Effect of Various Capacitors on Frequency Response – 1 MCQ’s

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This set of Analog Electronic Circuits Multiple Choice Questions & Answers (MCQs) focuses on “Effect of Various Capacitors on Frequency Response – 1″.

1. During high frequency applications of a B.J.T., which parasitic capacitors arise between the collector and the emitter?
a) No capacitor arises
b) Ccs
c) Cb
d) Ccs and Cb

2. During high frequency applications of a B.J.T, which parasitic capacitors arise between the collector and the base?
a) Cje and Cb
b) Ccs
c) Cπ
d) Cµ

3. During high frequency applications of a B.J.T., which parasitic capacitors arise between the base and the emitter?
a) Cje and Cb
b) Ccs
c) Cb
d) Ccs and Cb

4. Which parasitic capacitors are present at the collector terminal of the B.J.T.?
a) Cje and Cb
b) Ccs and Cµ
c) Cb
d) Ccs and Cb

5. Which parasitic capacitors don’t affect the frequency response of the C.B. stage of the B.J.T.?
a) None of the parasitic capacitances
b) All the parasitic capacitances
c) Some of the coupling capacitors
d) Ccs and Cb

6. If the transconductance of the B.J.T increases, the transit frequency ______
a) Increases
b) Decreases
c) Doesn’t get affected
d) Doubles

7. Which parasitic capacitors do not affect the frequency response of the C.E. stage, of the B.J.T.?
a) Cje and Cb
b) Ccs and Cµ
c) Cb and Cµ
d) No parasitic capacitor gets deactivated

8. Which parasitic capacitors don’t affect the frequency response of the C.C. stage of the B.J.T.?
a) Ccs
b) Ccs and Cb
c) Cb
d) Ccs and Cµ

9. If the total capacitance between the base and the emitter increases by a factor of 2, the transit frequency __________
a) reduces by 2
b) increases by 2
c) reduces by 4
d) increases by 4

10. If a C.E. stage with early effect has a load Rl and transconductance gm, what is the factor by which the capacitance between the base and the collector at the output side, gets multiplied?
a) 1 + 2/gm*(Rl || ro)
b) 1 – 1/gm*(Rl || ro)
c) 1 + 1/gm*(Rl || ro)
d) 1 – 2/gm*(Rl || ro)

11. If a C.E. stage has a load Rl and transconductance gm, what is the factor by which the capacitance between the base and the collector at the input side gets multiplied?
a) 1 + gmRl
b) 1 – gmRl
c) 1 + 2*gmRl
d) 1 – 2*gmRl

12. Which effect plays a critical role in producing changes in the frequency response of the B.J.T.?
a) Thevenin’s effect
b) Miller effect
c) Tellegen’s effect
d) Norton’s effect

13. If a C.E. stage has a load Rl and transconductance gm, what is the factor by which the capacitance between the base and the collector at the output side gets multiplied?
a) 1 + 1/gmRl
b) 1 – 1/gmRl
c) 1 + 2/gmRl
d) 1 – 2/gmRl

14. For a high frequency response of a simple C.E. stage with a transconductance of gm, what is Cin?
a) Cµ(1 + gm*R2) – Cπ
b) Cµ(1 + gm*R2) + Cπ
c) Cµ(1 – 2*gm*R2) + Cπ
d) Cµ(1 + 2*gm*R2) – Cπ

15. For a high frequency response of a simple C.E. stage with a transconductance of gm, what is Cout?
a) Ccs – Cµ*(2 + 1/gm*R2)
b) Ccs + Cµ*(1 + 2/gm*R2)
c) Ccs – Cµ*(1 + 1/gm*R2)
d) Ccs + Cµ*(1 + 1/gm*R2)

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