Electronics and Experimental Methods (CSIR Physical Sciences): Questions 20 - 22 of 44

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Question number: 20

» Electronics and Experimental Methods » Semiconductor Devices » Transistors

Appeared in Year: 2012

MCQ▾

Question

The transistor in the given circuit has hfe=35Ω and hie=1000Ω . If the load resistance RL=1000Ω , the voltage and current gain are, respectively – (June)

Circuit diagram of transistor

Circuit Diagram of Transistor

In figure a circuit consist of the transistor is shown.

Choices

Choice (4) Response

a.

+35and35

b.

35and0.97

c.

0.98and35

d.

35and+35

Question number: 21

» Electronics and Experimental Methods » Operational Amplifiers

Appeared in Year: 2011

MCQ▾

Question

In the operational amplifier circuit below, the voltage at point A is –

Image shows an operational amplifier circuit

Image Shows an Operational Amplifier Circuit

In figure a circuit of an operational amplifier

(December)

Choices

Choice (4) Response

a.

0 V

b.

– 5.0 V

c.

0.5 V

d.

1.0 V

Question number: 22

» Electronics and Experimental Methods » Filtering and Noise Reduction

Appeared in Year: 2014

MCQ▾

Question

Consider a Low Pass (LP) and High Pass (HP) filter with cut – off frequency fLP and fHP respectively, connected in series or in parallel configuration as shown in figure A and B below:

Series and Parallel Configuration of HP and LP filter

Series and Parallel Configuration of HP and LP Filter

In figure Low Pass (LP) and High Pass (HP) filter, connected in series and parallel configuration as shown in figure A and B, respectively.

Which of the following statement is correct? (December)

Choices

Choice (4) Response

a.

For fHP<fLP , A acts as a Band Pass filter and B acts as a Band Reject filter.

b.

For fHP>fLP , A passes the signal without filtering and B acts as a Band Reject filter.

c.

For fHP<fLP , A acts as a Band Pass filter and B passes the signal without filtering.

d.

For fHP>fLP , A stops the signal from passing through and B passes the signal without filtering.

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