Silicon Controlled Rectifiers(SCR)

This is an MCQ-based quiz on Silicon Controlled Rectifiers.

This includes Germanium, Silicon, Carbon, Triac, Diac, Unijunction transistor, and Thyristor

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An SCR is made of ___________

Germanium Silicon Carbon None of the above

When SCR starts conducting, then ___________ loses all control

Gate Cathode Anode None of the above

An SCR is a ___________ triggered device

Voltage Current Voltage as well as current None of the above

Which of the following device has characteristic close to that of an ideal voltage source?

Zener diode Vacuum diode Crystal diode All of the above

Define the disadvantages of rectifier?

Rectifiers cannot operate at high voltages. Rectifiers can operate at high voltages. high voltages. None of the above

An SCR can exercise control over __________ of a.c. supply

Positive half-cycles only Negative half-cycles only Both positive and negative half-cycles Positive or negative half-cycles

An SCR combines the features of __________

A rectifier and resistance A rectifier and transistor A rectifier and capacitor None of the above

An SCR is a solid state equivalent of __________.

Triode Pentode Gas-filled triode Tetrode

Pulse gate triggering is achieved by means of the ___.

An LC circuit

An UJT relaxation oscillator circuit

A diac-triac circuit

A rheostatic arrangement

With gate open, the maximum anode current at which SCR is turned off from ON condition is called _____.

Breakdown voltage

Peak reverse voltage

Holding current

Latching current

We can control a.c. power in a load by connecting _________.

Two SCRs in series

Two SCRs in parallel

Two SCRs in parallel opposition

None of the above

An SCR has three terminals viz __________

Cathode, Anode, Gate

Anode, Cathode, Grid

Anode, Cathode, Drain

None of the above

In an SCR circuit, the angle of conduction can be changed by ……….

Changing anode voltage Changing gate voltage Reverse biasing the gate None of the above

When SCR is OFF, the current in the circuit is …………….

Exactly zero Small leakage current Large leakage current None of the above

Quiz/Test Summary

Title: Silicon Controlled Rectifiers(SCR)

Questions: 14

Contributed by:

Diego Fri, Mar 25, 2022 01:17 PM UTC

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