The control element of an SCR is ___________

When SCR starts conducting, then ___________ loses all control

A

Gate

B

Cathode

C

Anode

D

None of the above

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

In pneumatic control systems the control valve used as final control element converts

A

Pressure signal to electric signal

B

Pressure signal to position change

C

Electric signal to pressure signal

D

Position change to pressure signal

An SCR is made of ___________

A

Germanium

B

Silicon

C

Carbon

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

An SCR has ___________ pn junctions

A

Two

B

Three

C

Four

D

None of the above

An SCR behaves as a ___________ switch

A

Unidirectional

B

Bidirectional

C

Mechanical

D

None of the above

An SCR is a solid state equivalent of ___________

A

Triode

B

Pentode

C

Gas-filled triode

D

Tetrode

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

A

Changing anode voltage

B

Changing gate voltage

C

Reverse biasing the gate

D

None of the above

The control element of an SCR is ___________

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