Explore topic-wise MCQs in Electronic Devices and Circuits.

This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Electronic Devices and Circuits knowledge and support exam preparation. Choose a topic below to get started.

1.

How the input impedance of a common collector transistor amplifier expressed in terms of transistor hybrid parameters?

A. h<sub>ic</sub> + (h<sub>fc</sub> h<sub>rc</sub> / Y<sub>L</sub> + h<sub>oc</sub>)
B. h<sub>ic</sub> (h<sub>fc</sub> h<sub>rc</sub> / Y<sub>L</sub> + h<sub>oc</sub>)
C. -h<sub>ic</sub> + (h<sub>fc</sub> h<sub>rc</sub> / Y<sub>L</sub> + h<sub>oc</sub>)
D. -h<sub>ic</sub> (h<sub>fc</sub> h<sub>rc</sub> / Y<sub>L</sub> + h<sub>oc</sub>)
Answer» C. -h<sub>ic</sub> + (h<sub>fc</sub> h<sub>rc</sub> / Y<sub>L</sub> + h<sub>oc</sub>)
Discussion
2.

How the input impedance of a common base transistor amplifier expressed in terms of transistor hybrid parameters?

A. -h<sub>ib</sub> + (h<sub>fb</sub> h<sub>ib</sub> / Y<sub>L</sub> + h<sub>ob</sub>)
B. h<sub>ib</sub> (h<sub>fb</sub> h<sub>ib</sub> / Y<sub>L</sub> + h<sub>ob</sub>)
C. -h<sub>ib</sub> + (h<sub>fb</sub> h<sub>rb</sub> / Y<sub>L</sub> + h<sub>ob</sub>)
D. h<sub>ib</sub> (h<sub>fb</sub> h<sub>rb</sub> / Y<sub>L</sub> + h<sub>ob</sub>)
Answer» E.
Discussion
3.

How the input impedance of a common emitter transistor amplifier expressed in terms of transistor hybrid parameters?

A. h<sub>ie</sub> (h<sub>fe</sub> h<sub>oe</sub> / Y<sub>L</sub> + h<sub>re</sub>)
B. h<sub>ie</sub> + (h<sub>fe</sub> h<sub>oe</sub> / Y<sub>L</sub> + h<sub>re</sub>)
C. h<sub>ie</sub> (h<sub>fe</sub> h<sub>re</sub> / Y<sub>L</sub> + h<sub>oe</sub>)
D. h<sub>ie</sub> + (h<sub>fe</sub> h<sub>re</sub> / Y<sub>L</sub> + h<sub>oe</sub>)
Answer» D. h<sub>ie</sub> + (h<sub>fe</sub> h<sub>re</sub> / Y<sub>L</sub> + h<sub>oe</sub>)
Discussion
4.

What is the input impedance of a transistor amplifier circuit if I1 = 10mA, I2 = 20mA, V1 = 25V, V2 = 15V?

A. 0.5k
B. 2k
C. 1.5k
D. 2.5k
Answer» E.
Discussion
5.

How the current gain of a common collector transistor amplifier expressed in terms of transistor hybrid parameters?

A. -h<sub>fc</sub> / (1 + Z<sub>L</sub> h<sub>rc</sub>)
B. h<sub>fc</sub> / (1 + Z<sub>L</sub> h<sub>rc</sub>)
C. -h<sub>fc</sub> / (1 + Z<sub>L</sub> h<sub>oc</sub>)
D. h<sub>fc</sub> / (1 + Z<sub>L</sub> h<sub>oc</sub>)
Answer» D. h<sub>fc</sub> / (1 + Z<sub>L</sub> h<sub>oc</sub>)
Discussion
6.

How the current gain of a common base transistor amplifier expressed in terms of transistor hybrid parameters?

A. -h<sub>fb</sub> / (1 + Z<sub>L</sub> h<sub>ob</sub>)
B. h<sub>fb</sub> / (1 + Z<sub>L</sub> h<sub>ob</sub>)
C. -h<sub>fb</sub> / (1 + Z<sub>L</sub> h<sub>rb</sub>)
D. h<sub>fb</sub> / (1 + Z<sub>L</sub> h<sub>rb</sub>)
Answer» B. h<sub>fb</sub> / (1 + Z<sub>L</sub> h<sub>ob</sub>)
Discussion
7.

How the current gain of a common emitter transistor amplifier expressed in terms of transistor hybrid parameters?

A. -h<sub>fe</sub> / (1 + Z<sub>L</sub> h<sub>re</sub>)
B. h<sub>fe</sub> / (1 + Z<sub>L</sub> h<sub>re</sub>)
C. -h<sub>fe</sub> / (1 + Z<sub>L</sub> h<sub>oe</sub>)
D. h<sub>fe</sub> / (1 + Z<sub>L</sub> h<sub>oe</sub>)
Answer» D. h<sub>fe</sub> / (1 + Z<sub>L</sub> h<sub>oe</sub>)
Discussion
8.

What is the current gain of a transistor amplifier circuit if I1 = 10mA, I2 = 20mA, V1 = 25V, V2 = 15V?

A. -0.5
B. -2
C. 0.5
D. 2
Answer» C. 0.5
Discussion