Electronics and Experimental Methods (CSIR Physical Sciences): Questions 14 - 16 of 41

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Question number: 14

» Electronics and Experimental Methods » Operational Amplifiers

Appeared in Year: 2014

MCQ▾

Question

Consider the amplifier circuit comprising of two

An amplifier circuit composed of two op – amps

An Amplifier Circuit Composed of Two Op – Amps

In figure am amplifier circuit is shown, which is made up of two op – amps A1 and A2.

If the input ac signal has an impedance of 50kΩ , which of the following statements is true? (December)

Choices

Choice (4) Response

a.

A1 is required in the circuit if the output has to follow the phase of the input signal.

b.

A1 is required in the circuit because the source impedance is much greater than r

c.

A1 is required in the circuit because the source impedance is much less than R

d.

A1 can be eliminated from the circuit without affecting the overall gain

Question number: 15

» Electronics and Experimental Methods » Semiconductor Devices » Diodes

Appeared in Year: 2012

MCQ▾

Question

A diode D as shown in the circuit has an I – V relation that can be approximated by –

iD={

The circuit consists of a diode, resistor and a battery

The Circuit Consists of a Diode, Resistor and a Battery

In figure a diode D, resistor of 1 (ohm) and a battery of 10 V are connected.

The value of VD in the circuit is – (December)

Choices

Choice (4) Response

a.

8V

b.

5V

c.

(1+11)V

d.

2V

Question number: 16

» Electronics and Experimental Methods » Digital Techniques and Applications » Registers

Appeared in Year: 2012

MCQ▾

Question

The logic circuit shown in the figure below,

A logic circuit diagram

A Logic Circuit Diagram

In figure a logic circuit diagram consists of two Ex-OR gates and one OR gate.

implements the Boolean expression, (December)

Choices

Choice (4) Response

a.

y=A+B

b.

y=AB¯

c.

y=AB

d.

y=A¯B¯

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