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 :
some charge from the capacitor will flow back into the source.
some extra charge from the source will flow back into the capacitor.
the electric field intensity between the two plate does not change.
the electric field intensity between the two plates will decrease.
Solution:
Concept: Capacitance with dielectric.
Formula: (C' = KC), (Q = CV).
Solution: When a dielectric is introduced in a capacitor connected to a constant potential difference (V), the capacitance (C) increases to (KC). Since (V) is constant, the charge (Q = CV) must increase. Thus, extra charge flows from the source into the capacitor.
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