Q. Assertion (A): McMurray Bredford half bridge inverter uses complementary commutation

Reason (R): Three phase inverter can have two modes of operation.

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Q. In a single phase full wave ac regulator feeding R-L load, the gate pulses

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Q. In a semi converter feeding a resistive load,

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Q. In a single phase semi-converter the number of thyristors is

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Q. A dc chopper is feeding an RLE load. The current can become discontinuous if

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Q. Which of these commutation methods uses two leads?

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Q. In rectifier circuits, the rms value of ac component of output voltage is equal to

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Q. A UJT exhibits negative resistance characteristics when

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Q. In rectifier circuits, ripple factor RF and form factor FF are related as

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Q. If we connect two silicon unilateral switches in anti- parallel we get

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Q. A single phase half wave rectifier is feeding a resistive load. As firing angle is increased

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Q. A cycloconverter for single phase operation has

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Q. A chopper is a high efficiency circuit.

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Q. The difference between resonant commutation and self commutation is

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Q. Which of these devices have four layers?

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Q. When UJT is used for thyristor gate signal, the output of UJT is

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Q. The stud in a stud mounted SCR acts as

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Q. In a single phase full wave regulator feeding R-L load, short gate pulse are not suitable.

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Q. Half bridge and full bridge inverters of one type use different commutation methods.

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Q. Assertion (A): An ac regulator uses natural commutation

Reason (R): An ac regulator can be used for static on load tap changing of transformer.

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