Power Electronics: Application of electronics to the control and conversion of electric power.

This is an MCQ-based quiz on Power  Electronics.

This includes Triac, FET, SCR, and Diac

Start Quiz

A Triac has three terminals viz ………………

Drain, source, gate Two main terminal and a gate terminal Cathode, anode, gate None of the above

The V-I characteristics for a triac in the first and third quadrants are essentially identical to those of ………………. in its first quadrant

Transistor SCR UJT none of the above

A triac can pass a portion of …………… half-cycle through the load

Only positive Only negative Both positive and negative None of the above

The triple frequency of a six-phase half wave rectifier for 220 V, 60 Hz input will be -

2160 Hz 360 Hz 720 Hz 60 Hz

The minimum duration of the pulse in a pulse triggering system for thyristors should be at -

10 ms 10 μs 30 ms 15 ms

A triac is a -

3 terminal bidirectional switch 3 terminal bilateral switch 2 terminal switch 2 terminal bilateral switch

Which semiconductor power device out of the following, is not a current triggering device?

MOSFET G.T.O Triac Thyristor

Which statement is true for latching current ?

It is related to conduction process of device. It is related to turn off process of the device. It is related to turn on process of the device. None of the above

A triac is equivalent to two SCRs ___________.

In parallel In series In inverse-parallel None of the above

The triac is ___________.

Like a bidirectional SCR A four-terminal device Not a thyristor None of the above

When a UJT is turned ON, the resistance between emitter terminal and lower base terminal ___________

Remains the same Is decreased Is increased None of the above

A diac has ___________ semiconductor layers

Three Two Four None of the above

A diac is simply ___________.

A single junction device A three junction device A triac without gate terminal None of the above
Quiz/Test Summary
Title: Power Electronics: Application of electronics to the control and conversion of electric power.
Questions: 13
Contributed by:
Diego