Assertion : In the following circuit e.m.f. is `2 V` internal resistance of the cell is `1 Omega` and `R = 1 Omega` the reading of the voltmeter is `1 V`.
Reason : `V = E - ir`, where `E = 2 V, i= 1 A` and `R = 1 Omega`

Options

A. If both assertion and reason are ture and reason is the correct explanation of assertion.
B. If both assertion and reason are true but reason is not the correct explanation of assertion.
C. If assertion is true but reason is false.
D. If assertion and reason both are false.

Answer

A

Explanation

(a) Here `E = 2 V, I = (2)/(2) = 1 amp` and `r = 1 Omega`
`:. V = E - ir = 2 - (1)(1) = 1` volt