Transistors - Practice Test

[#111] In a transistor, the base current is about ___________ of emitter current

(A) 25%

(B) 20%

(C) 35%

(D) 5%

Correct Answer

(D) 5%

[#112] At series resonance, voltage across L is ___________ voltage across C

(A) Equal to but opposite in phase to

(B) Equal to but in phase with

(C) Greater than but in phase with

(D) Less than but in phase with

Correct Answer

(A) Equal to but opposite in phase to

[#113] A transistor is a ___________ operated device

(A) current

(B) voltage

(C) both voltage and current

(D) none of the above

Correct Answer

(A) current

Explanation

Solution: A transistor is a current-operated device. In a transistor, the output current is controlled by the input current, specifically the base current controls the collector current. This characteristic makes it a current-controlled device, unlike some other devices that are controlled by voltage.

[#114] Transistor biasing is done to keep ___________ in the circuit

(A) Proper direct current

(B) Proper alternating current

(C) The base current small

(D) Collector current small

Correct Answer

(A) Proper direct current

[#115] A tuned amplifier is used in ___________ applications

(A) Radio frequency

(B) Low frequency

(C) Audio frequency

(D) None of the above

Correct Answer

(A) Radio frequency

Transistors - Study Mode

[#111] In a transistor, the base current is about ___________ of emitter current

Correct Answer

[#112] At series resonance, voltage across L is ___________ voltage across C

Correct Answer

[#113] A transistor is a ___________ operated device

Correct Answer

Explanation

[#114] Transistor biasing is done to keep ___________ in the circuit

Correct Answer

[#115] A tuned amplifier is used in ___________ applications

Correct Answer