Statement I : In the circuit in `Fig. 7.46`, both cells are ideal and of fixed emf, the resistor `R_(1)` has fixed resistance and the resistance of resistor `R_(2)` can be varied ( but `R_(2)` is always non zero). Then the electric power delivered to the resistor of resistance `R_(1)` is independent of the value of resistance `R_(2)`.
Statement II: If potential difference across a fixed resistance is unchanged , the poweer delivered to the resistor remains constant.

Options

A. If both Assertion `&` Reason are True `&` the Reason is a correct explanation of the Assertion.
B. If both Assertion `&` Reason are True but Reason is not a correct explanation of the Assertion.
C. If Assertion is True but the Reason is False.
D. If both Assertion `&` Reason are False.

Answer

A

Explanation

The potential difference across the resistance is always `|E_(1)-E_(2)|` in magnitude. Hence statement 1 and 2 are true and statement 2 is correct explanation of statement 1.