In a series of resonant circuit, with an increase in L

• resonant frequency will decrease

• bandwidth will decrease

• Quality factor will increase

• all of the above

The major advantage of ZCS and ZVS is

• Switch turn on and off and zero voltage and zero current

• High current stress on switch

• Low current on switch

• none of the mentioned

The soft switching helps in

• Increasing switching frequency

• Reducing switch stress

• Decreasing EMI

• All of these

The solid state relays have a

• SCR

• Coil and contact arrangement

• Optocoupler

• None of the above

A converter circuit which employs turn off and on when the voltage or current through the device is zero at an instant switching is called a _____.

• conventional converter

• resonant converter

• zero switching converter

• power converter

The difference between resonant commutation and self-commutation is

• both of these methods are based on entirely different principles

• in resonant commutation, the commutating elements carry load otherwise, it does not carry load current

• in a resonant commutation uses L and C but self-commutation uses only a capacitor

• none of the above

Induction heating is a ______ type of heating.

• zero frequency

• high frequency

• low frequency

• power frequency

In order to tune a parallel resonance circuit to a lower frequency, the capacitance must

• be increased

• be decreased

• be zero

• remain the same

A parallel resonant circuit can be employed

• as a high impedance

• to reject a small band of frequencies

• to amplify certain frequencies

• both A and B

In a series and parallel resonant circuit, increase in resistance would cause

• increase in bandwidth for both circuits

• decrease in bandwidth for both circuits

• decrease in bandwidth for series circuit and increase for parallel circuit

• increase in bandwidth for series circuit and decrease for parallel circuit