BJT Questions with Answers Free Practice Test | Page 2

Bipolar-Junction Transistors (BJT) are essential components in analog and digital circuits. These transistors act as amplifiers or switches and are crucial in designing electronic systems. Many aptitude questions and answers in exams like GATE, ISRO, and DRDO focus on BJT characteristics, configurations, and biasing. This section provides BJT questions with answers and step-by-step solutions to help you understand transistor operation in common-base, common-emitter, and common-collector setups. Practicing these problems through aptitude test practice online strengthens your theoretical knowledge and helps in solving circuit-based questions efficiently during competitive exams.

Learn about BJT operation and characteristics. See also transistor bias circuits and electronic devices

Showing 10 of 24 questions

Per page:

Q11

With low-power transistor packages, the base terminal is usually the:

A tab end
B middle
C right end
D stud mount

Answer: Option B

Q12

 When a silicon diode is forward biased, what is VBE for a C-E configuration?

A voltage-divider bias
B 0.4 V
C 0.7 V
D emitter voltage

Answer: Option C

Q13

What is the current gain for a common-base configuration where IE = 4.2 mA and IC = 4.0 mA?

A 16.80
B 1.05
C 0.20
D 0.95

Answer: Option D

Q14

If a 2 mV signal produces a 2 V output, what is the voltage gain?

A 0.001
B 0.004
C 100
D 1000

Answer: Option D

Q15

The symbol hfe is the same as:

A mca12_1001a1.gif
B mca12_1001b1.gif
C hi-fi
D mca12_1001d1.gif

Answer: Option A

Q16

Most of the electrons in the base of an NPN transistor flow:

A out of the base lead
B into the collector
C into the emitter
D into the base supply

Answer: Option B

Q17

In a transistor, collector current is controlled by:

A collector voltage
B base current
C collector resistance
D all of the above

Answer: Option B

Q18

Total emitter current is:

A IE – IC
B IC + IE
C IB + IC
D IB – IC

Answer: Option C

Q19

Often a common-collector will be the last stage before the load; the main function(s) of this stage is to:

A provide voltage gain
B provide phase inversion
C provide a high-frequency path to improve the frequency response
D buffer the voltage amplifiers from the low-resistance load and

Answer: Option D

Q20

For a C-C configuration to operate properly, the collector-base junction should be reverse biased, while forward bias should be applied to which junction?

A collector-emitter
B base-emitter
C collector-base
D cathode-anode

Answer: Option A

📚 More from Electronics

← All Topics 🎯 Practice ⏱️ Take Test 🔍 Search

Back to Electronics

Bipolar-Junction Transistors (BJT) Questions and Answers

📚 More from Electronics

Electronics

Other Subjects

Bipolar-Junction Transistors (BJT) Questions and Answers

📚 More from Electronics

Electronics

Other Subjects

Report a Problem