Basically, what is a thyristor?
Correct answer D. A PNPN device
Subject / 245 questions
Electrical Engineering MCQs
Page 12 of Electrical Engineering multiple-choice questions with answers. Tap an option to check yourself.
Page 12 of 13
Which PNPN device is fitted with two gate terminals?
Correct answer B. SCS
How many junctions does a silicon controlled rectifier (SCR) have?
Correct answer C. Device with three junctions
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Which thyristor is the solid-state equivalent of a thyratron tube?
Correct answer B. Silicon controlled rectifier (SCR)
How is a TRIAC best described?
Correct answer B. 3 terminal bidirectional switch
Which quantity has the watt as its SI unit?
Correct answer D. Power
Which of the following quantities has no unit?
Correct answer D. Magnetic susceptibility
The kilowatt-hour (kWh) is a unit of which quantity?
Correct answer B. Energy
Which quantity is a voltmeter designed to measure?
Correct answer B. Voltage
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What is the internal resistance of an ideal current source?
Correct answer A. Infinite
What is the internal resistance of an ideal voltage source?
Correct answer A. Zero
A capacitor prevents a sudden change in which quantity?
Correct answer A. Voltage
An inductor prevents a sudden change in which quantity?
Correct answer C. Current
How much power does an ideal inductor dissipate?
Correct answer C. Zero
Which of the following are passive elements?
Correct answer A. Both
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When a current of 1 A flows in a circuit, how many electrons pass through it each second?
Correct answer B. 0.625 × 10^19
On what does the resistivity of a conductor depend?
Correct answer A. Type of material
A conductor of diameter d and length l has a resistance of R Ω. If the diameter is halved and the length doubled, what will its resistance become?
Correct answer D. 8R Ω
A circuit carries a steady current of 10 A for one minute. How many coulombs of charge pass through it?
Correct answer D. 600
What is the unit of resistivity?
Correct answer A. Ω·metre