A parallel plate air-core capacitor is connected across a source of constant potential differenc...

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A parallel plate air-core capacitor is connected across a source of constant potential difference. When a dielectric plate is introduced between the two plates then :
\( P \)
(A) some charge from the capacitor will flow back into the source.
(B) some extra charge from the source will flow back into the capacitor.
W.
(C) the average electric field intensity between the two plate does not change.
(D) the electric field intensity between the two plates will decrease.
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