AIPMT 2009 · Physics

AIPMT 2009 Physics Questions with Solutions

The AIPMT 2009 paper had 49 Physics questions from 22 chapters.

Current Electricity had the most questions (5), followed by System of Particles and Rotational Motion with 4.

3 questions below have the answer and explanation free; the other 46 are in Premium.

Practise AIPMT 2009 Physics free

Physics questions: 49
Chapters covered: 22
Solved free here: 3 of 49
Easy / Medium / Hard: 13 / 27 / 9

Difficulty is NEET MIND's own tag for each question.

Chapter-wise: AIPMT 2009 Physics

How many questions each chapter had in AIPMT 2009. Open a chapter for its questions from every year.

All 49 AIPMT 2009 Physics questions

In paper order. Try each one, then open the answer where it is shown.

Question 1 (AIPMT 2009, Q1)
Units and MeasurementsEasy
If the dimensions of a physical quantity are given by [ $M^a$ $L^b$ $T^c$ ], then the physical quantity will be:
1. Option A: Force if a = 0, b = -1, c = -2
2. Option B: Pressure if a = 1, b = -1, c = -2
3. Option C: Velocity if a = 1, b = 0, c = -1
4. Option D: Acceleration if a = 1, b = 1, c = -2
The answer and explanation for this question are in NEET MIND Premium.
Question 2 (AIPMT 2009, Q2)
Motion in a Straight LineEasy
A particle starts its motion from rest under the action of a constant force. If the distance covered in first 10 seconds is $S_1$ and that covered in the first 20 seconds is $S_2$ then:
1. Option A: $S_2$ = $S_1$
2. Option B: $S_2$ = $2S_1$
3. Option C: $S_2$ = $3S_1$
4. Option D: $S_2$ = $4S_1$
The answer and explanation for this question are in NEET MIND Premium.
Question 3 (AIPMT 2009, Q3)
Motion in a PlaneMedium
A bus is moving with a speed of $10\,\mathrm{m\,s^{-1}}$ on a straight road. A scooterist wishes to overtake the bus in $100\,\mathrm{s}$ . If the bus is at a distance of $1\,\mathrm{km}$ from the scooterist, with what speed should the scooterist chase the bus?
1. Option A: $10\,\mathrm{m\,s^{-1}}$
2. Option B: $20\,\mathrm{m\,s^{-1}}$
3. Option C: $40\,\mathrm{m\,s^{-1}}$
4. Option D: $25\,\mathrm{m\,s^{-1}}$
The answer and explanation for this question are in NEET MIND Premium.
Question 4 (AIPMT 2009, Q4)
Laws of MotionEasy
The mass of lift is $2000\,\mathrm{kg}$ . When the tension in the supporting cable is $28000\,\mathrm{N}$ , then its acceleration is:
1. Option A: $14\,\mathrm{m\,s^{-2}}$ upwards
2. Option B: $30\,\mathrm{m\,s^{-2}}$ downwards
3. Option C: $4\,\mathrm{m\,s^{-2}}$ upwards
4. Option D: $4\,\mathrm{m\,s^{-2}}$ downwards
The answer and explanation for this question are in NEET MIND Premium.
Question 5 (AIPMT 2009, Q5)
Laws of MotionMedium
An explosion blows a rock into three parts. Two parts go off at right angles to each other. These two are: a $1\,\mathrm{kg}$ first part moving with a velocity of $12\,\mathrm{m\,s^{-1}}$ and a $2\,\mathrm{kg}$ second part moving with a velocity of $8\,\mathrm{m\,s^{-1}}$ . If the third part flies off with a velocity of $4\,\mathrm{m\,s^{-1}}$ , its mass would be:
1. Option A: $3\,\mathrm{kg}$
2. Option B: $5\,\mathrm{kg}$
3. Option C: $7\,\mathrm{kg}$
4. Option D: $17\,\mathrm{kg}$
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Question 6 (AIPMT 2009, Q6)
OscillationsMedium
A block of mass $M$ is attached to the lower end of a vertical spring. The spring is hung from a ceiling and has force constant $k$ . The mass is released from rest with the spring initially unstretched. The maximum extension produced in the length of the spring will be:
1. Option A: $\dfrac{Mg}{2k}$
2. Option B: $\dfrac{Mg}{k}$
3. Option C: $\dfrac{2Mg}{k}$
4. Option D: $\dfrac{4Mg}{k}$
The answer and explanation for this question are in NEET MIND Premium.
Question 7 (AIPMT 2009, Q7)
System of Particles and Rotational MotionEasy
Two bodies of mass $1\,\text{kg}$ and $3\,\text{kg}$ have position vectors $\hat{i}+2\hat{j}+\hat{k}$ and $-3\hat{i}-2\hat{j}+\hat{k}$ respectively. The centre of mass of this system has a position vector:
1. Option A: $-\hat{i}+\hat{j}+\hat{k}$
2. Option B: $-2\hat{i}+2\hat{k}$
3. Option C: $-2\hat{i}-\hat{j}+\hat{k}$
4. Option D: $2\hat{i}-\hat{j}-2\hat{k}$
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Question 8 (AIPMT 2009, Q8)
System of Particles and Rotational MotionMedium
Four identical thin rods each of mass $M$ and length $l$ form a square frame. The moment of inertia of this frame about an axis through the centre of the square and perpendicular to its plane is:
1. Option A: $\dfrac{1}{3}Ml^2$
2. Option B: $\dfrac{4}{3}Ml^2$
3. Option C: $\dfrac{2}{3}Ml^2$
4. Option D: $\dfrac{13}{3}Ml^2$
The answer and explanation for this question are in NEET MIND Premium.
Question 9 (AIPMT 2009, Q9)
System of Particles and Rotational MotionMedium
A thin circular ring of mass $M$ and radius $R$ is rotating in a horizontal plane about an axis perpendicular to its plane with angular velocity $\omega$ . If two objects each of mass $m$ are attached gently to opposite ends of a diameter of the ring, then the ring will rotate with angular velocity:
1. Option A: $\dfrac{\omega M}{M+m}$
2. Option B: $\dfrac{\omega(M-2m)}{M+2m}$
3. Option C: $\dfrac{\omega M}{M+2m}$
4. Option D: $\dfrac{\omega(M+2m)}{M}$
The answer and explanation for this question are in NEET MIND Premium.
Question 10 (AIPMT 2009, Q10)
Laws of MotionEasy
A body under the action of a force $\vec{F}=6\hat{i}-8\hat{j}+10\hat{k}$ acquires an acceleration of $1\,\mathrm{m\,s^{-2}}$ . The mass of the body must be:
1. Option A: $10\sqrt{2}\,\mathrm{kg}$
2. Option B: $2\sqrt{10}\,\mathrm{kg}$
3. Option C: $10\,\mathrm{kg}$
4. Option D: $20\,\mathrm{kg}$
The answer and explanation for this question are in NEET MIND Premium.
Question 11 (AIPMT 2009, Q11)
System of Particles and Rotational MotionMedium
If $\vec{F}$ is the force acting on a particle having position vector $\vec{r}$ and $\vec{\tau}$ be the torque of this force about the origin, then:
1. Option A: $\vec{r}\cdot\vec{\tau}=0$ and $\vec{F}\cdot\vec{\tau}\ne0$
2. Option B: $\vec{r}\cdot\vec{\tau}\ne0$ and $\vec{F}\cdot\vec{\tau}=0$
3. Option C: $\vec{r}\cdot\vec{\tau}>0$ and $\vec{F}\cdot\vec{\tau}<0$
4. Option D: $\vec{r}\cdot\vec{\tau}=0$ and $\vec{F}\cdot\vec{\tau}=0$
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Question 12 (AIPMT 2009, Q12)
GravitationMedium
The figure shows the elliptical orbit of a planet m about the Sun $S$ . The shaded area $SCD$ is twice the shaded area $SAB$ . If $t_1$ is the time for the planet to move from $C$ to $D$ and $t_2$ is the time to move from $A$ to $B$ , then:
1. Option A: $t_1=t_2$
2. Option B: $t_1>t_2$
3. Option C: $t_1=4t_2$
4. Option D: $t_1=2t_2$
The answer and explanation for this question are in NEET MIND Premium.
Question 13 (AIPMT 2009, Q13)
Work, Energy and PowerMedium
An engine pumps water continuously through a hose. Water leaves the hose with velocity $v$ and $m$ is the mass per unit length of the water jet. What is the rate at which kinetic energy is imparted to water?
1. Option A: $\frac{1}{2}m^2v^2$
2. Option B: $\frac{1}{2}mv^3$
3. Option C: $mv^3$
4. Option D: $\frac{1}{2}mv^2$
The answer and explanation for this question are in NEET MIND Premium.
Question 14 (AIPMT 2009, Q14)
Work, Energy and PowerEasy
A body of mass $1\,\mathrm{kg}$ is thrown vertically upward with velocity $20\,\mathrm{m/s}$ . It momentarily comes to rest after reaching a height of $18\,\mathrm{m}$ . How much energy is lost due to air friction? ( $g=10\,\mathrm{m/s^2}$ )
1. Option A: $10\,\mathrm{J}$
2. Option B: $20\,\mathrm{J}$
3. Option C: $30\,\mathrm{J}$
4. Option D: $40\,\mathrm{J}$
The answer and explanation for this question are in NEET MIND Premium.
Question 15 (AIPMT 2009, Q15)
Thermal Properties of MatterEasy
The two ends of a rod of length $L$ and uniform cross-sectional area $A$ are kept at temperatures $T_1$ and $T_2$ ( $T_1>T_2$ ). The rate of heat transfer dQ/dt through the rod in steady state is:
1. Option A: Option 1
2. Option B: Option 2
3. Option C: Option 3
4. Option D: Option 4
Show answer & explanationHide answer & explanation
Correct answer: (A) Option 1
Explanation
Using Fourier’s law: $\frac{dQ}{dt}=\frac{kA(T_1-T_2)}{L}$
Question 16 (AIPMT 2009, Q16)
ThermodynamicsEasy
In thermodynamic processes, which of the following statements is not true?
1. Option A: In an adiabatic process $PV^{\gamma}=\text{constant}$
2. Option B: In an adiabatic process the system is insulated from surroundings
3. Option C: In an isochoric process pressure remains constant
4. Option D: In an isothermal process temperature remains constant
The answer and explanation for this question are in NEET MIND Premium.
Question 17 (AIPMT 2009, Q17)
Thermal Properties of MatterMedium
A black body at $227^{\circ}C$ radiates heat at the rate of $7\,\mathrm{cal\,cm^{-2}s^{-1}}$ . At $727^{\circ}C$ , the rate of heat radiated will be:
1. Option A: 80
2. Option B: 60
3. Option C: 50
4. Option D: 112
Show answer & explanationHide answer & explanation
Correct answer: (D) 112
Explanation
Using Stefan–Boltzmann law: $P\propto T^4$ $\frac{P_2}{P_1}=\left(\frac{1000}{500}\right)^4=16$ $P_2=16\times7=112$
Question 18 (AIPMT 2009, Q18)
ThermodynamicsEasy
The internal energy change in a system that has absorbed $2\,\mathrm{kcal}$ of heat and done $500\,\mathrm{J}$ of work is:
1. Option A: $7900\,\mathrm{J}$
2. Option B: $8900\,\mathrm{J}$
3. Option C: $6400\,\mathrm{J}$
4. Option D: $5400\,\mathrm{J}$
The answer and explanation for this question are in NEET MIND Premium.
Question 19 (AIPMT 2009, Q19)
WavesHard
The driver of a car traveling with speed $30\,\mathrm{m/s}$ towards a hill sounds a horn of frequency $600\,\mathrm{Hz}$ . If the speed of sound in air is $330\,\mathrm{m/s}$ , the frequency of reflected sound heard by the driver is:
1. Option A: $500\,\mathrm{Hz}$
2. Option B: $550\,\mathrm{Hz}$
3. Option C: $555.5\,\mathrm{Hz}$
4. Option D: $720\,\mathrm{Hz}$
The answer and explanation for this question are in NEET MIND Premium.
Question 20 (AIPMT 2009, Q20)
OscillationsMedium
A simple pendulum performs simple harmonic motion about $x=0$ with an amplitude $a$ and time period $T$ . The speed of the pendulum at $x=\dfrac{a}{2}$ will be:
1. Option A: $\dfrac{\pi a\sqrt{3}}{T}$
2. Option B: $\dfrac{\pi a\sqrt{3}}{2T}$
3. Option C: $\dfrac{\pi a}{T}$
4. Option D: $\dfrac{3\pi^2 a}{T}$
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Question 21 (AIPMT 2009, Q21)
OscillationsMedium
Which one of the following equations of motion represents simple harmonic motion? Where k, $k_0$ , $k_1$ and a are all positive
1. Option A: Acceleration $= kx$
2. Option B: Acceleration $= -k_0x+k_1x^2$
3. Option C: Acceleration $=-k(x+a)$
4. Option D: Acceleration $=k(x+a)$
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Question 22 (AIPMT 2009, Q22)
Electromagnetic WavesHard
The electric field part of an electromagnetic wave in a medium is represented by: $E_x=0$ $E_y=2.5\,\frac{N}{C}\cos\left[\left(2\pi\times10^6\,\frac{rad}{m}\right)t-\left(\pi\times10^{-2}\,\frac{rad}{s}\right)x\right]$ $E_z=0$ The wave is:
1. Option A: Moving along $-x$ direction with frequency $10^6$ Hz and wavelength $200$ m
2. Option B: Moving along $y$ direction with frequency $2\pi\times10^6$ Hz and wavelength $200$ m
3. Option C: Moving along $x$ direction with frequency $10^6$ Hz and wavelength $100$ m
4. Option D: Moving along $x$ direction with frequency $10^6$ Hz and wavelength $200$ m
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Question 23 (AIPMT 2009, Q23)
WavesHard
A wave in a string has amplitude $2\,cm$ . The wave travels in the positive $x$ -direction with speed $128\,m/s$ and 5 complete waves are present in a length of $4\,m$ . The equation describing the wave is:
1. Option A: y = (0.02)m sin (7.58x – 1005 t)
2. Option B: y = (0.02)m sin (7.85x + 1005 t)
3. Option C: y = (0.02)m sin (15.7x – 2010 t)
4. Option D: y = (0.02)m sin (15.7x + 2010 t)
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Question 24 (AIPMT 2009, Q24)
WavesMedium
Each of the two strings of lengths $51.6\,cm$ and $49.1\,cm$ are tensioned separately by $20\,N$ . Mass per unit length of both strings is $1\,g/m$ . When both strings vibrate simultaneously, the number of beats produced is:
1. Option A: 3
2. Option B: 5
3. Option C: 7
4. Option D: 8
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Question 25 (AIPMT 2009, Q25)
Electrostatic Potential and CapacitanceMedium
Three capacitors each of capacitance $C$ and breakdown voltage $V$ are joined in series. The equivalent capacitance and breakdown voltage of the combination will be:
1. Option A: $3C,\;3V$
2. Option B: $\dfrac{C}{3},\;\dfrac{V}{3}$
3. Option C: $3C,\;\dfrac{V}{3}$
4. Option D: $\dfrac{C}{3},\;3V$
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Question 26 (AIPMT 2009, Q26)
Current ElectricityMedium
A wire of resistance $12\,\Omega$ per metre is bent to form a complete circle of radius $10\,cm$ . The resistance between its two diametrically opposite points A and B is:
1. Option A: $6\,\Omega$
2. Option B: $0.6\pi\,\Omega$
3. Option C: $3\,\Omega$
4. Option D: $6\pi\,\Omega$
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Question 27 (AIPMT 2009, Q27)
Moving Charges and MagnetismMedium
A bar magnet having a magnetic moment of $2\times10^4\,JT^{-1}$ is free to rotate in a horizontal plane. A horizontal magnetic field $B=6\times10^{-4}\,T$ exists in the space. The work done in rotating the magnet slowly from a direction parallel to the field to a direction $60^\circ$ from the field is:
1. Option A: $2\,J$
2. Option B: $0.6\,J$
3. Option C: $12\,J$
4. Option D: $6\,J$
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Question 28 (AIPMT 2009, Q28)
Moving Charges and MagnetismMedium
The magnetic force acting on a charged particle of charge $-2\mu C$ in a magnetic field of $2\,T$ acting in y-direction, when the particle velocity is $(2\hat{i}+3\hat{j})\times10^6\,m/s$ , is:
1. Option A: $8N$ in z-direction
2. Option B: $8N$ in negative z-direction
3. Option C: $4N$ in z-direction
4. Option D: $8N$ in y-direction
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Question 29 (AIPMT 2009, Q29)
Electromagnetic InductionMedium
A conducting circular loop is placed in a uniform magnetic field of $0.04\,T$ with its plane perpendicular to the magnetic field. The radius of the loop starts shrinking at $2\,mm/s$ . The induced emf in the loop when the radius is $2\,cm$ is:
1. Option A: $1.6\pi\,\mu V$
2. Option B: $3.2\pi\,\mu V$
3. Option C: $4.8\pi\,\mu V$
4. Option D: $0.8\pi\,\mu V$
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Question 30 (AIPMT 2009, Q30)
Electrostatic Potential and CapacitanceHard
The electric potential at a point $(x,y,z)$ is given by: $V=-x^2y-xz^3+4$
1. Option A: Option 1
2. Option B: Option 2
3. Option C: Option 3
4. Option D: Option 4
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Question 31 (AIPMT 2009, Q31)
Current ElectricityHard
See the electrical circuit shown in the figure. Which one of the following equations is a correct equation for it?
1. Option A: Option 1
2. Option B: Option 2
3. Option C: Option 3
4. Option D: Option 4
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Question 32 (AIPMT 2009, Q32)
Current ElectricityMedium
A galvanometer having a coil resistance of $60\,\Omega$ shows full scale deflection when a current of $1.0\,A$ passes through it. It can be converted into an ammeter to read currents up to $5.0\,A$ by:
1. Option A: Putting in parallel a resistance of $15\,\Omega$
2. Option B: Putting in parallel a resistance of $240\,\Omega$
3. Option C: Putting in series a resistance of $15\,\Omega$
4. Option D: Putting in series a resistance of $240\,\Omega$
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Question 33 (AIPMT 2009, Q33)
Moving Charges and MagnetismEasy
Under the influence of a uniform magnetic field, a charged particle moves with constant speed V in a circle of radius $R$ . The time period of rotation of the particle:
1. Option A: Depends on both v and R
2. Option B: Depends on v and not on R
3. Option C: Depends on R and not on v
4. Option D: Is independent of both v and R
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Question 34 (AIPMT 2009, Q34)
Alternating CurrentHard
Power dissipated in an LCR series circuit connected to an AC source of emf $\varepsilon$ is:
1. Option A: Option 1
2. Option B: Option 2
3. Option C: Option 3
4. Option D: Option 4
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Question 35 (AIPMT 2009, Q35)
Electrostatic Potential and CapacitanceHard
Three concentric spherical shells have radii $a$ , $b$ , and $c$ $(a<b<c)$ and have surface charge densities $\sigma$ , $-\sigma$ , and $\sigma$ respectively. If $V_A$ , $V_B$ , and $V_C$ denote the potentials of the shells, then for $c=a+b$ , we have:
1. Option A: $V_C=V_B=V_A$
2. Option B: $V_C=V_A\ne V_B$
3. Option C: $V_C=V_B\ne V_A$
4. Option D: $V_C\ne V_B\ne V_A$
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Question 36 (AIPMT 2009, Q36)
Current ElectricityMedium
A student measures the terminal potential difference $(V)$ of a cell (emf $\varepsilon$ and internal resistance $r$ ) as a function of current $(I)$ flowing through it. The slope and intercept of the graph between $V$ and $I$ are respectively equal to:
1. Option A: $-\varepsilon$ and $r$
2. Option B: $\varepsilon$ and $-r$
3. Option C: $-r$ and $\varepsilon$
4. Option D: $r$ and $-\varepsilon$
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Question 37 (AIPMT 2009, Q37)
Electromagnetic InductionHard
A rectangular, a square, a circular and an elliptical loop, all in the $(x-y)$ plane, are moving out of a uniform magnetic field with a constant velocity $\vec{V}=v·\hat{i}$ . The magnetic field is directed along the negative $z$ -axis direction. The induced emf, during the passage of these loops coming out of the field region, will not remain constant for:
1. Option A: any of the four loops
2. Option B: The rectangular, circular and elliptical loops
3. Option C: The circular and the elliptical loops
4. Option D: Only the elliptical loop
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Question 38 (AIPMT 2009, Q38)
Magnetism and MatterEasy
If a diamagnetic substance is brought near the north or the south pole of a bar magnet, it is:
1. Option A: Attracted by both the poles
2. Option B: Repelled by both the poles
3. Option C: Repelled by the north pole and attracted by the south pole
4. Option D: Attracted by the north pole and repelled by the south pole
Show answer & explanationHide answer & explanation
Correct answer: (B) Repelled by both the poles
Explanation
Diamagnetic substances are weakly repelled by magnetic fields irrespective of pole.
Question 39 (AIPMT 2009, Q39)
Dual Nature of Radiation and MatterEasy
The number of photoelectrons emitted for light of frequency $\nu$ (higher than threshold frequency $\nu_0$ ) is proportional to:
1. Option A: Frequency of light $(\nu)$
2. Option B: $\nu-\nu_0$
3. Option C: Threshold frequency $(\nu_0)$
4. Option D: Intensity of light
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Question 40 (AIPMT 2009, Q40)
Dual Nature of Radiation and MatterMedium
Monochromatic light of wavelength $667\,\mathrm{nm}$ is produced by a helium-neon laser. The power emitted is $9\,\mathrm{mW}$ . The number of photons arriving per second on the average at a target irradiated by this beam is:
1. Option A: $3 \times 10^{19}$
2. Option B: $9 \times 10^{17}$
3. Option C: $3 \times 10^{16}$
4. Option D: $9 \times 10^{15}$
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Question 41 (AIPMT 2009, Q41)
Dual Nature of Radiation and MatterMedium
The figure shows a plot of photo current versus anode potential for a photosensitive surface for three different radiations. Which one of the following is correct?
1. Option A: Curves (b) and (c) represent incident radiations having same frequencies and same intensity
2. Option B: Curves (a) and (b) represent incident radiations of different frequencies and different intensities
3. Option C: Curves (a) and (b) represent incident radiations of same frequencies but different intensities
4. Option D: Curves (b) and (c) represent incident radiations of different frequencies and different intensities
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Question 42 (AIPMT 2009, Q42)
NucleiMedium
The number of beta particles emitted by a radioactive substance is twice the number of alpha particles emitted by it. The resulting daughter is an:
1. Option A: Isotope of parent
2. Option B: Isobar of parent
3. Option C: Isomer of parent
4. Option D: Isotone of parent
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Question 43 (AIPMT 2009, Q43)
AtomsMedium
The ionization energy of the electron in hydrogen atom in its ground state is $13.6\,\text{eV}$ . The atoms are excited to higher energy levels to emit radiations of 6 wavelengths. Maximum wavelength corresponds to transition between:
1. Option A: n = 4 to n = 3 states
2. Option B: n = 3 to n = 2 states
3. Option C: n = 3 to n = 1 states
4. Option D: n = 2 to n = 1 states
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Question 44 (AIPMT 2009, Q44)
NucleiMedium
In a Rutherford scattering experiment when a projectile of charge $Z_1$ and mass $M_1$ approaches a target nucleus of charge $Z_2$ and mass $M_2$ , the distance of closest approach is $r_0$ . The energy of the projectile is:
1. Option A: Directly proportional to mass $M_1$
2. Option B: Directly proportional to $M_1×M_2$
3. Option C: Directly proportional to $Z_1Z_2$
4. Option D: Inversely proportional to $Z_1$
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Question 45 (AIPMT 2009, Q45)
NucleiMedium
In the nuclear decay given below: $^{A}_{Z}X \rightarrow {}^{A}_{Z+1}Y \rightarrow {}^{A-4}_{Z-1}B^{*} \rightarrow {}^{A-4}_{Z-1}B$ The particles emitted in the sequence are:
1. Option A: $\alpha,\beta,\gamma$
2. Option B: $\beta,\alpha,\gamma$
3. Option C: $\gamma,\beta,\alpha$
4. Option D: $\beta,\gamma,\alpha$
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Question 46 (AIPMT 2009, Q46)
Current ElectricityHard
The mean free path of electrons in a metal is $4 \times 10^{-8}\,\text{m}$ . The electric field which can give on an average $2\,\text{eV}$ energy to an electron in the metal will be in units of $\text{V/m}$ :
1. Option A: $5 \times 10^{7}$
2. Option B: $8 \times 10^{7}$
3. Option C: $5 \times 10^{-11}$
4. Option D: $8 \times 10^{-11}$
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Question 47 (AIPMT 2009, Q48)
Semiconductor ElectronicsMedium
A p–n photodiode is fabricated from a semiconductor with a band gap of $2.5\,\text{eV}$ . It can detect a signal of wavelength:
1. Option A: $496\,\AA$
2. Option B: $6000\,\AA$
3. Option C: $4000\,\text{nm}$
4. Option D: $6000\,\text{nm}$
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Question 48 (AIPMT 2009, Q49)
Semiconductor ElectronicsMedium
The symbolic representation of four logic gates are given below. The logic symbols for OR, NOT and NAND gates are respectively:
1. Option A: (i), (iii), (iv)
2. Option B: (iii), (iv), (ii)
3. Option C: (iv), (i), (iii)
4. Option D: (iv), (ii), (i)
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Question 49 (AIPMT 2009, Q50)
Semiconductor ElectronicsEasy
A transistor is operated in common-emitter configuration at $V_C = 2\,\text{V}$ such that a change in the base current from $100\,\mu\text{A}$ to $200\,\mu\text{A}$ produces a change in the collector current from $5\,\text{mA}$ to $10\,\text{mA}$ . The current gain is:
1. Option A: 50
2. Option B: 75
3. Option C: 100
4. Option D: 150
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