Scr (Silicon Controlled Rectifiers) MCQs

Option A: Zero

Option B: 10 V

Option C: 1 V

Option D: 1 V

Correct Answer: 1 V ✔

Option A: Voltage

Option B: Current

Option C: Voltage as well as current

Option D: None of the above

Correct Answer: Current ✔

Option A: Is inexpensive

Option B: Is mechanically strong

Option C: Has small leakage current

Option D: Is tetravalent

Correct Answer: Has small leakage current ✔

Option A: Equal to

Option B: Less than

Option C: Greater than

Option D: None of the above

Correct Answer: Less than ✔

Option A: Breakover voltage

Option B: Appropriate anode current

Option C: Appropriate gate current

Option D: None of the above

Correct Answer: Appropriate gate current ✔

Option A: A rectifier and resistance

Option B: A rectifier and transistor

Option C: A rectifier and capacitor

Option D: None of the above

Correct Answer: A rectifier and transistor ✔

Option A: Reducing anode voltage to zero

Option B: Reducing gate voltage to zero

Option C: Reverse biasing the gate

Option D: None of the above

Correct Answer: Reducing anode voltage to zero ✔

Option A: Cathode

Option B: Anode

Option C: Anode supply

Option D: Gate

Correct Answer: Gate ✔

Option A: At zero potential

Option B: Negative

Option C: Positive

Option D: None of the above

Correct Answer: Positive ✔

Option A: Unidirectional

Option B: Bidirectional

Option C: Mechanical

Option D: None of the above

Correct Answer: Unidirectional ✔

Option A: Positive

Option B: Negative

Option C: At zero potential

Option D: None of the above

Correct Answer: Positive ✔

Option A: Triac

Option B: Diac

Option C: Unijunction transistor

Option D: Thyristor

Correct Answer: Thyristor ✔

Option A: Triode

Option B: Pentode

Option C: Gas-filled triode

Option D: Tetrode

Correct Answer: Gas-filled triode ✔

Option A: Cathode, anode, gate

Option B: Anode, cathode, grid

Option C: Anode, cathode, drain

Option D: None of the above

Correct Answer: Cathode, anode, gate ✔

Option A: Germanium

Option B: Silicon

Option C: Carbon

Option D: None of the above

Correct Answer: Silicon ✔

Option A: Two

Option B: Three

Option C: Four

Option D: None of the above

Correct Answer: Four ✔

Option A: Two

Option B: Three

Option C: Four

Option D: None of the above

Correct Answer: Three ✔

Option A: Anode current is reduced to zero

Option B: Gate voltage is reduced to zero

Option C: Gate is reverse biased

Option D: None of the above

Correct Answer: Anode current is reduced to zero ✔

Option A: Is decreased

Option B: Is increased

Option C: Remains the same

Option D: None of the above

Correct Answer: Is decreased ✔

Option A: Changing anode voltage

Option B: Changing gate voltage

Option C: Reverse biasing the gate

Option D: None of the above

Correct Answer: Changing gate voltage ✔

Option A: Exactly zero

Option B: Small leakage current

Option C: Large leakage current

Option D: None of the above

Correct Answer: Small leakage current ✔

Option A: Two SCRs in series

Option B: Two SCRs in parallel

Option C: Two SCRs in parallel opposition

Option D: None of the above

Correct Answer: Two SCRs in parallel ✔

Option A: Remains the same

Option B: Is increased

Option C: Is decreased

Option D: None of the above

Correct Answer: Is decreased ✔

Option A: Positive half-cycles only

Option B: Negative half-cycles only

Option C: Both positive and negative half-cycles

Option D: Positive or negative half-cycles

Correct Answer: Positive or negative half-cycles ✔

Option A: Gate

Option B: Cathode

Option C: Anode

Option D: None of the above

Correct Answer: Gate ✔