JEE Main 2021 (4 Aug, Shift 2) Physics Q20: A student…

Question

A student measured volume of a 3 dimensional body of height, length and breadth h, l and b respectively using three vernier callipers A, B and C. He found the volumes to be $\mathrm{V_A}$, $\mathrm{V_B}$, $\mathrm{V_C}$ respectively and forgot to apply the zero error correction
The actual value of volume is $\mathrm{V_0}$. If $\mathrm{V_A} > \mathrm{V_0}$, $\mathrm{V_B} - \mathrm{V_C}$ is a positive value and $\mathrm{V_C} < \mathrm{V_0}$, then what is not true about A, B and C.

Accepted Answer

Option 4: A has a negative zero error and C has a positive zero error.

Answer

$\mathrm{V_A}$ and $\mathrm{V_B}$ may have values more than $\mathrm{V_0}$ and $\mathrm{V_C}$.

Answer

A has positive zero error, C has negative zero error.

Answer

B may have positive, negative or no zero error.

Answer

A has a negative zero error and C has a positive zero error.

JEE Main 4 August 2021, Shift 2, Physics Q20