Power Electronics

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Equalising circuits are provided across each SCR in series operation to pro- vide uniform

In its application, an SUS behaves in the same way as

When transistors are used in series or parallel, a snubber circuit is used to

A conducting SCR can be opened by reducing __________ to zero.

The device which cannot be triggered by voltage of either polarity is

Which semiconductor power device out of the following is not a current trig- gered device?

In a SCR circuit, the angle of conduction can be changed by changing

The SCR is turned-off when the anode current falls below

Thyristor A has rated gate current of 2 A and thyristor B is a rated gate current of 100 mA

A UJT has one base resistance of 5.2 k. Its intrinsic stand of ratio is 0.67. The inter-base voltage of 12 V is applied across the two passes. The value of base current will be

Optocouplers combine

The normal way to close a SCR is by

The uncontrolled electronic switch employed in power-electronic converters is

It is recommended to use UJT oscillator for gate-triggering of the thyristors mainly because

As compared to UJT, SUS

With gate open, a SCR can be turned-on by making supply voltage

For thyristors, pulse triggering is preferred to triggering because

UJT oscillators are used for gate-triggering of thyristors for

Which of the following PNPN devices does not have a gate terminal?

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