CSIR Physical Sciences: Questions 30 - 32 of 401

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Question number: 30

» Electromagnetic Theory » Dynamics of Charged Particles in Static Electromagnetic Field

Appeared in Year: 2014

MCQ▾

Question

A charged particle moves in a helical path under the influence of a constant magnetic field. The initial velocity is such that the component along the magnetic field is twice the component in the plane normal to magnetic field.

A charged particle moves in a helical path

A Charged Particle Moves in a Helical Path

Figure shows a charged particle moves in a helical path under the influence of a constant magnetic field.

The ratio lR of the pinch l to the radius R of the helical path is –

(December)

Choices

Choice (4) Response

a.

2π

b.

π

c.

4π

d.

π2

Question number: 31

» Electronics and Experimental Methods » Operational Amplifiers

Appeared in Year: 2013

MCQ▾

Question

Consider the op – amp circuit shows in the figure.

An op – amp circuit diagram

An Op – Amp Circuit Diagram

In figure an op – amp circuit diagram is shown.

If the input is a sinusoidal wave Vi=5sin(1000t) , then the amplitude of output V0 is – (December)

Choices

Choice (4) Response

a.

5

b.

52

c.

52

d.

522

Question number: 32

» Quantum Mechanics » Variational Method

Appeared in Year: 2014

MCQ▾

Question

Let ψnlm denote the eigenfunctions of a Hamiltonian for a spherically symmetric potential V (r). The expectation value of Lz in the state ψ=16[ψ200+5ψ210+10ψ211+20ψ211] is - (December)

Choices

Choice (4) Response

a.

518

b.

56

c.

518

d.

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