Choose the correct statements from the following:

A. Induced emf opposes any change in the current in a circuit
B. Induced emf in a closed coil can be increased by increasing the number of turns in the coil
C. Varying current in a coil can not induce emf in a neighbouring coil.
D. An LCR circuit has zero impedance at resonant frequency
E. Average power supplied to an inductor over one complete cycle is zero

Choose the correct answer from the options given below:

A, B and E only

The correct answer is Option (3) → A, B and E only

(A) This is true as it follows Lenz's law, which states that the induced emf always opposes change in magnetic flux that causes it.

(B) This is true because the induced emf is directly proportional to the number of turns (N) in the coil. Increasing the number of turns increases the total emf.

(E) This is true. In an ideal inductor, the power alternates between positive and negative values as energy is stored and released from the magnetic field. Over a complete cycle, the net transfer is zero.