# Electromagnetic Theory-Electromagnetic Induction (CSIR (Council of Scientific & Industrial Research) Physical Sciences): Questions 1 - 4 of 4

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## Question number: 1

» Electromagnetic Theory » Electromagnetic Induction

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Appeared in Year: 2014

MCQ▾

### Question

A superconducting ring carries a steady current in the presence of a magnetic field normal to the plane of the ring. Identify the incorrect statement. (December)

### Choices

Choice (4)Response

a.

The flux passing through the superconductor is quantized in unit of

b.

The current density and are related by the equation where is a constant.

c.

The superconductor shows an energy gap, which is proportional to the transition temperature of the superconductor.

d.

The current and the magnetic field in the superconductor are time independent.

## Question number: 2

» Electromagnetic Theory » Electromagnetic Induction

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Appeared in Year: 2013

MCQ▾

### Question

The electric field of an electromagnetic wave is given by, . The associated magnetic field is (December – 2013)

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 3

» Electromagnetic Theory » Electromagnetic Induction

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Appeared in Year: 2011

MCQ▾

### Question

Consider a solenoid of radius R with turns per unit length, in which a time dependent current (where ) flows. The magnitude of the electric field at a perpendicular distance from the axis of symmetry of the solenoid, is – (December)

### Choices

Choice (4)Response

a.

b.

0

c.

d.

## Question number: 4

» Electromagnetic Theory » Electromagnetic Induction

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Appeared in Year: 2016

MCQ▾

### Question

A conducting circular disc of radius and resistivity rotates with an angular velocity in a magnetic field perpendicular to it. voltmeter is connected as shown in the figure below.

Assume its internal resistance to be infinite, the reading on the voltmeter: (December)

### Choices

Choice (4)Response

a.

depends on and

b.

depends on and , but not on

c.

is zero because a current flows in the direction of

d.

is zero because the flux through the loop is not changing

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