The upper frequency limit of BJT depends on the:

collector length in the transistor

One major disadvantage of BJTs over FETs is that:

they do not have a good noise figure

BJTs are suitable for RF applications because:

good performance in terms of frequency

BJTs are bipolar junction transistors. The name bipolar is given because:

they are made of n type and p type semiconductor

they have holes as charge carriers

they have electrons as charge carriers

Explore topic-wise MCQs in Microwave Engineering.

This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Microwave Engineering knowledge and support exam preparation. Choose a topic below to get started.

1.	with the increase in the operating frequency of a BJT, the S22 parameter of the transistor:
A.	increases
B.	decreases
C.	remains constant
D.	none of the mentioned
Answer» C. remains constant

Discussion

2.	In the hybrid –π model of a BJT, the capacitance Cc between the base and collector in the hybrid –π model is ignored.
A.	true
B.	false
Answer» B. false

Discussion

3.	The upper frequency limit of BJT depends on the:
A.	collector length in the transistor
B.	base length
C.	emitter length
D.	driving voltage
Answer» C. emitter length

Discussion

4.	Bipolar junction transistor is a ________ driven device.
A.	current
B.	voltage
C.	power
D.	none of the mentioned
Answer» B. voltage

Discussion

5.	One major disadvantage of BJTs over FETs is that:
A.	they have low gain
B.	they do not have a good noise figure
C.	low bandwidth
D.	none of the mentioned
Answer» C. low bandwidth

Discussion

6.	At frequency range of about 2-4 GHz, BJTs are preferred over FETs.
A.	true
B.	false
Answer» B. false

Discussion

7.	Silicon junction transistors are used as amplifiers at frequency range of about:
A.	5-10 MHz
B.	2-10 GHz
C.	40-50 MHz
D.	12-45 GHz
Answer» C. 40-50 MHz

Discussion

8.	Bipolar junction transistors have _______ 1/f characteristics hence making them suitable for oscillators.
A.	high
B.	low
C.	constant
D.	decreasing exponential
Answer» C. constant

Discussion

9.	BJTs are suitable for RF applications because:
A.	good performance in terms of frequency
B.	power capacity
C.	noise characteristics
D.	all of the mentioned
Answer» E.

Discussion

10.	BJTs are bipolar junction transistors. The name bipolar is given because:
A.	they are made of n type and p type semiconductor
B.	they have holes as charge carriers
C.	they have electrons as charge carriers
D.	none of the mentioned
Answer» E.

Discussion

Explore topic-wise MCQs in Microwave Engineering.

with the increase in the operating frequency of a BJT, the S22 parameter of the transistor:

In the hybrid –π model of a BJT, the capacitance Cc between the base and collector in the hybrid –π model is ignored.

The upper frequency limit of BJT depends on the:

Bipolar junction transistor is a ________ driven device.

One major disadvantage of BJTs over FETs is that:

At frequency range of about 2-4 GHz, BJTs are preferred over FETs.

Silicon junction transistors are used as amplifiers at frequency range of about:

Bipolar junction transistors have _______ 1/f characteristics hence making them suitable for oscillators.

BJTs are suitable for RF applications because:

BJTs are bipolar junction transistors. The name bipolar is given because: