Consider a parallel-plate capacitor having area A = 0.40 m2 and separation d = 0

Question

Consider a parallel-plate capacitor having area A = 0.40 m2 and separation d = 0.016 m.
(a) The capacitor is first attached to a battery having voltage 9 V. What are Q (in pC) and ?V?
?V = 2 . V
Q = 3 . pC

(b) Now, the battery is removed, and a metallic slab of thickness a = 0.006 m is inserted. What are Q (in pC) and ?V?
Q = 4 . pC After the battery is removed, can Q or V change?
?V = 5 . V After the battery is removed, can Q or V change?

(c) Finally, the battery is reattached. What are Q (in pC) and ?V?
?V = 6 . V What should be the potential difference between the two plates when connected to a power supply of voltage V?
Q = 7 . pC

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