Question

One of the plates of the capacitor is connected to a source at $+20V$. The other plate $P$ is earthed. What is the potential of the plate $P$ ?

• A. - 20 V
• B. + 20 V
• C. zero
• D. None of the above.

Answer 1

Answer: (C)

When a plate is earthed its potential is zero.
When a plate is not earthed and it is not connected to a source of emf even in this case also its potential is zero