Top 80+ Solved Electronic Circuits 1 MCQ Questions Answer
Q. Which of the following condition is true for cut-off mode?
a. the collector current is zero
b. the collector current is proportional to the base current
c. the base current is non zero
d. all of the mentioned
Q. Which of the following is true for the cut- off region in an npn transistor?
a. potential difference between the emitter and the base is smaller than 0.5v
b. potential difference between the emitter and the base is smaller than 0.4v
c. the collector current increases with the increase in the base current
d. the collector current is always zero and the base current is always non zero
Q. Which of the following is true for a typical active region of an npn transistor?
a. the potential difference between the emitter and the collector is less than 0.5 v
b. the potential difference between the emitter and the collector is less than 0.4 v
c. the potential difference between the emitter and the collector is less than 0.3 v
d. the potential difference between the emitter and the collector is less than 0.2 v
Q. Which of the following is true for the active region of an npn transistor?
a. the collector current is directly proportional to the base current
b. the potential difference between the emitter and the collector is less than 0.4 v
c. all of the mentioned
d. none of the mentioned
Q. Which of the following is true for a npn transistor in the saturation region?
a. the potential difference between the collector and the base is approximately 0.2v
b. the potential difference between the collector and the base is approximately 0.3v
c. the potential difference between the collector and the base is approximately 0.4v
d. the potential difference between the collector and the base is approximately 0.5v
Q. The potential difference between the base and the collector Vcb in a pnp transistor in saturation region is
a. -0.2 v
b. -0.5v
c. 0.2 v
d. 0.5 v
Q. For a pnp transistor in the active region the value of Vce (potential difference between the collector and the base) is
a. less than 0.3v
b. less than 3v
c. greater than 0.3v
d. greater than 3v
Q. Which of the following is true for a pnp transistor in active region?
a. cb junction is reversed bias and the eb junction is forward bias
b. cb junction is forward bias and the eb junction is forward bias
c. cb junction is forward bias and the eb junction is reverse bias
d. cb junction is reversed bias and the eb junction is reverse bias
Q. Which of the following is true for a pnp transistor in saturation region?
a. cb junction is reversed bias and the eb junction is forward bias
b. cb junction is forward bias and the eb junction is forward bias
c. cb junction is forward bias and the eb junction is reverse bias
d. cb junction is reversed bias and the eb junction is reverse bias
Q. For the circuit shown, find the quiescent point.
a. none of the below
b. (4v, 10ma)
c. (10v, 3ma)
d. (3ma, 10v)
Q. The feature of an approximate model of a transistor is
a. it helps in quicker analysis
b. it provides individual analysis for different configurations
c. it helps in dc analysis
d. ac analysis is not possible
Q. Which of the following acts as a buffer?
a. cc amplifier
b. ce amplifier
c. cb amplifier
d. cascaded amplifier
Q. Which of the following is true?
a. cc amplifier has a large current gain
b. ce amplifier has a large current gain
c. cb amplifier has low voltage gain
d. cc amplifier has low current gain
Q. For best operation of a BJT, which region must the operating point be set at?
a. active region
b. cutoff region
c. saturation region
d. reverse active region
Q. From the given circuit, using a silicon transistor, what is the value of IBQ?
a. 47.08 ma
b. 47.08 ua
c. 50 ua
d. 0 ma