CSIR Physical Sciences: Questions 90 - 92 of 401

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Question number: 90

» 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 Equation , which of the following statements is true? (December)

Choices

Choice (4) Response

a.

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

b.

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

c.

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

d.

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

Question number: 91

» Mathematical Methods of Physics » Binomial, Poisson and Normal Distributions

Appeared in Year: 2014

MCQ▾

Question

If the electrostatic potential in spherical polar coordinates is Equation ; where Equation and Equation are constants, then the charge density at a distance Equation will be – (June)

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 92

» Classical Mechanics » Special Theory of Relativity » Relativistic Kinematics

Appeared in Year: 2012

MCQ▾

Question

Two events, separated by a (special) distance Equation , are simultaneous in one inertial frame. The time interval between these two events in a frame moving with a constant speed Equation (where the speed of light Equation ) is – (June)

Choices

Choice (4) Response

a.

40 s

b.

60 s

c.

20 s

d.

0 s

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