CSIR Physical Sciences: Questions 359 - 362 of 389

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Question number: 359

» Electronics and Experimental Methods » Operational Amplifiers

Appeared in Year: 2011

MCQ▾

Question

A time varying signal Vin is fed to an Op – Amp circuit with output signal V0 as shown

A circuit diagram of an Op – amp

A Circuit Diagram of an Op – Amp

In figure a circuit diagram of an Op – amp is shown.

The circuit implements a (June)

Choices

Choice (4) Response
a.

Low pass filter with cutoff frequency 16 Hz

b.

Low pass filter with cutoff frequency 100 Hz

c.

High pass filter with cutoff frequency 16 Hz

d.

High pass filter with cutoff frequency 100 Hz

Question number: 360

» Thermodynamic and Statistical Physics » Diffusion Equation

Appeared in Year: 2011

MCQ▾

Question

Consider two independently diffusing non-interacting in 3 – dimensional space, both placed at the origin at time t=0 . These particles have different diffusion constants D1 and D2 . The quantity [R1(t)R2(t)]2 where R1(t) and R2(t) are the positions of the particles at time t , behaves as – (June)

Choices

Choice (4) Response
a.

6tD1D2

b.

6tD12+D22

c.

6t(D1+D2)

d.

6t(D1D2)

Question number: 361

» Mathematical Methods of Physics » Poles, Residues & Evaluation of Integrals

Appeared in Year: 2011

MCQ▾

Question

The value of the real integral I=3+3dxx2+3x+2 is – (December)

Choices

Choice (4) Response
a.

b.

ln(25)

c.

0

d.

3π2

Question number: 362

» Quantum Mechanics » Variational Method

Appeared in Year: 2011

MCQ▾

Question

If an electron is in the ground state of the hydrogen atom, the probability that its distance from the proton is more than one Bohr radius is approximately, (June)

Choices

Choice (4) Response
a.

0.48

b.

0.68

c.

0.28

d.

0.91

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