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

If firing angle in an SCR circuit is increased, the output ___________

A

Remains the same

B

Is increased

C

Is decreased

D

None of the above

In an SCR circuit the supply voltage is generally ___________ that of breakover voltage

A

Equal to

B

Less than

C

Greater than

D

None of the above

When SCR is OFF, the current in the circuit is ___________

A

Exactly zero

B

Small leakage current

C

Large leakage current

D

None of the above

"All changed, changed utterly: A terrible beauty is born" This extract is taken from W.B Yeats' poem titled _______

A

No Second troy

B

Easter 1916

C

The Second Coming

D

The Wild Swans at Coole

If one angle of a triangle is three times a second angle and the third is 20 degrees more than the second angle, the second angle, in degrees, is

A

32

B

36

C

4

D

None of these

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

A

Positive half-cycles only

B

Negative half-cycles only

C

Both positive and negative half-cycles

D

Positive or negative half-cycles

An SCR is made of ___________

A

Germanium

B

Silicon

C

Carbon

D

None of the above

When SCR starts conducting, then ___________ loses all control

A

Gate

B

Cathode

C

Anode

D

None of the above

An SCR is a ___________ triggered device

A

Voltage

B

Current

C

Voltage as well as current

D

None of the above

In the normal operation of an SCR, anode is ___________ w.r.t. cathode

A

At zero potential

B

Negative

C

Positive

D

None of the above

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

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