A parallel-plate capacitor is connected to a battery of

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

12\,\text{V}

. Its plate separation is then doubled without disconnecting the battery. If the initial energy stored was

U_{1}

, what is the new energy

U_{2}

? (a)

U_{2}=U_{1}

(b)

U_{2}=2U_{1}

(c)

U_{2}=\dfrac{U_{1}}{2}

(d)

U_{2}=\dfrac{U_{1}}{4}