Experimental Skills Mastery Flashcards for NEET — 25 cards

First 8 of 25 Experimental Skills Mastery flashcards

Read the question, answer it in your head, then open the answer to check yourself.

1. Card 1 of 25

   Write the formula for the Least Count (LC) or Vernier Constant of Vernier Calipers.

   Hint: Difference between one main scale division and one vernier scale division.

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   Answer

   $LC = 1 \text{ MSD} - 1 \text{ VSD}$

2. Card 2 of 25

   What defines a POSITIVE zero error in Vernier Calipers?

   Hint: It means the instrument reads a value greater than zero when it should be zero.

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   Answer

3. Card 3 of 25

   How do you calculate the True Reading from an Observed Reading given a zero error?

   Hint: Always SUBTRACT the zero error with its proper sign (+ or -).

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   Answer

   $\text{True Reading} = \text{Observed Reading} - (\text{Zero Error})$

4. Card 4 of 25

   Define the 'Pitch' of a Screw Gauge.

   Hint: Usually 1 mm or 0.5 mm.

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   Answer

   The linear distance moved by the screw in one complete rotation of the circular scale.

5. Card 5 of 25

   Write the formula for the Least Count of a Screw Gauge.

   Hint: Relates linear movement to angular rotation.

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   Answer

   $LC = \frac{\text{Pitch}}{\text{Total divisions on Circular Scale}}$

6. Card 6 of 25

   What is 'Backlash Error' in a Screw Gauge and how is it avoided?

   Hint: Slippage in the threads.

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   Answer

   Error due to wear and tear of screw threads causing a lag in linear movement upon reversing rotation. Avoided by always rotating the screw in ONE direction while measuring.

7. Card 7 of 25

   In the Simple Pendulum experiment, what does the slope of the $T^2$ (Y-axis) vs $L$ (X-axis) graph represent?

   Hint: Derived from $T = 2\pi \sqrt{L/g}$.

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   Answer

   $\text{Slope} = \frac{4\pi^2}{g}$

8. Card 8 of 25

   What is the 'Effective Length' ($L$) of a simple pendulum?

   Hint: $L = l + r$ (length of string + radius of bob).

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   Answer

   The distance from the rigid point of suspension to the center of gravity of the spherical bob.