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When a UJT is used for triggering an SCR, then the wave shape of voltage obtained from the UJT circuit will be ____________

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When a UJT is used for triggering an SCR, then the wave shape of voltage obtained from the UJT circuit will be ____________

(a) Square

(b) Pulse

(c) Trapezoidal

(d) Saw-tooth

This question was posed to me by my college professor while I was bunking the class.

My doubt stems from DC Motors in portion Characteristics of DC & AC Motors of Electric Drives

1 Answer

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Best answer
The correct choice is (b) Pulse

The best explanation: UJT relaxation oscillator using RC circuit is used for SCR triggering and the wave shape obtained is an exponentially decaying pulse. So, we can say pulse waveform is obtained.

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