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Question

A parallel plate capacitor is connected across a 2 V battery and charged. The battery is then disconnected and a glass slab is introduced between plates. Which of the following pairs of quantities decreases?

A
Charge and potential difference.
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B
Potential difference and energy stored.
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C
Energy stored and capacitance.
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D
Capacitance and charge.
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Solution

The correct option is B Potential difference and energy stored.
When battery is disconnected, charge remains constant. On introducing glass slab, capacity increases. Potential difference and energy stored decreases.

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