Question

Assertion $\left(A\right)$: Absolute error in physical quantity can be positive, negative or zero.
Reason $\left(R\right)$: Absolute error is the difference in measured value and true value of physical quantity.
Choose the correct option:

• A. Both $A$ and $R$ are true and $R$ is the correct explanation of $A$.
• B. Both $A$ and $R$ are true and $R$ is not the correct explanation of $A$.
• C. $A$ is true but $R$ is false.
• D. $A$ is false but $R$ is true.

Answer 1

The correct option is D $A$ is false but $R$ is true.

Absolute error = $\mid \text{Measured value- Actual value}\mid$. It is always positive.
Hence, option $\left(d\right)$ is the correct answer.