Question

A wire of resistance R is connected across a cell of emf ε and internal resistance r. The current through the circuit is I. In time t, the work done by the battery to establish the current I is

• A. $\frac{ε^2t}{R}$
• B. IRt
• C. I2Rt
• D. εIt

Answer 1

Answer: (D)

εIt

Answer 2

The correct answer is (D) : εIt.