Question

Given below are two statements labelled as Assertion (A) and Reason (R).

Assertion (A) : When a current, $i=3\sqrt{2}\sin \left(\omega t\right)\text{A}$, flows in a wire, then the $\text{DC}$ ammeter connected in series reads $3\text{A}$.

Reason (R) : $\text{DC}$ ammeter reads the amplitude of the current passing through it.

Select the most appropriate answer from the options given below.

$[$0.77 Mark$]$

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

Answer 1

The correct option is D A is false and R is also false.

$\text{DC}$ ammeter reads average value of current.

For $i=3\sqrt{2}\sin \left(\omega t\right)$, the average value is zero.

So, $\text{DC}$ ammeter reading will be zero.