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  4. A parallel plate capacitor is connected to a 5 V battery and charged. The battery is then disconnected and a glass slab is introduced between the plates. Then the quantities that decrease are

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Q. A parallel plate capacitor is connected to a $5 \,V$ battery and charged. The battery is then disconnected and a glass slab is introduced between the plates. Then the quantities that decrease are

KEAMKEAM 2011Electrostatic Potential and Capacitance

Solution:

When a charging battery is disconnected and a glass slab is introduced between the plates, then
(i) Charge remains the same.
(ii) Capacitance increases.
(iii) Potential difference across the plates decreases.
(iv) Energy stored decreases.