Question

A parallel plate air core capacitor is connected across a source of constant potential difference. When a dielectric plate is introduce between the two plates, then

• A. some charge from the capacitor will flow back into the source.
• B. some extra charge from the source will flow into the capacitor.
• C. the electric field intensity between the two plates inside dielectric will increase.
• D. the electric field intensity between the two plates inside dielectric will decrease.

Answer 1

Answer: (B)

some extra charge from the source will flow into the capacitor.

As the capacitor is connected to the source, the potential difference as well as the filed remains constant between the plates. Here the charge will flow from the source to capacitor to maintain the constant potential.