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  4. 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 decrease?

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Q. 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 decrease?

Haryana PMTHaryana PMT 2011

Solution:

When battery is disconnected charge remains constant. On introducing glass slab capaciry increases. Potential difference and energy stored decreases.