Electrical Engg (EEE) - MCQ Practice Questions

Which of the following is a unidirectional device in power electronics?

The forward voltage drop across a silicon diode at room temperature is approximately:

Which device is used to convert DC to AC power?

The peak inverse voltage (PIV) rating of a diode is important to prevent:

In MOSFET, the gate-source voltage at which current starts to flow is called:

In a buck converter, the output voltage is always:

The maximum frequency of a thyristor is typically limited by:

A PWM inverter with sinusoidal modulation produces output voltage with:

The presence of freewheeling diode in a DC motor drive is essential because it:

In a boost converter operating in continuous conduction mode (CCM), if the duty cycle is 0.5 and input voltage is 12V, what is the output voltage?

Which of the following devices is a unidirectional switch in power electronics?

In a half-bridge inverter, what is the minimum number of switches required to generate AC output from DC source?

What is the primary purpose of a freewheeling diode in a buck converter?

In a three-phase full-bridge inverter, the total number of thyristors required is:

In a buck-boost converter, the polarity of output voltage compared to input is:

What is the maximum theoretical efficiency of a step-down chopper with duty cycle 0.5?

Which power semiconductor device is best suited for high-frequency switching applications above 100 kHz?

The holding current (Ih) specification of a thyristor is important to ensure:

What is the purpose of a freewheeling diode in a converter circuit?

What does the snubber circuit in a power converter primarily protect against?