Electromagnetic Theory (CSIR Physical Sciences): Questions 31 - 33 of 55

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Question number: 31

» Electromagnetic Theory » Electromagnetic Induction

Appeared in Year: 2014

MCQ▾

Question

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

Choices

Choice (4) Response
a.

The current density J and B are related by the equation ×J+Λ2B=0, where Λ is a constant.

b.

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

c.

The flux passing through the superconductor is quantized in unit of hce

d.

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

Question number: 32

» Electromagnetic Theory » Scalar and Vector Potentials

Appeared in Year: 2011

MCQ▾

Question

For constant uniform electric and magnetic fields E=E0 and B=B0 , it is possible to choose a gauge such that the scalar potential ϕ and vector potential A are given by, - (June)

Choices

Choice (4) Response
a.

ϕ=0andA=E0r

b.

ϕ=E0randA=0

c.

ϕ=E0randA=12(B0×r)

d.

ϕ=0andA=12(B0×r)

Question number: 33

» Electromagnetic Theory » Reflection and Refraction

Appeared in Year: 2011

MCQ▾

Question

Circularly polarized light with intensity I0 is incident normally on a glass prism as shown in the figure. The index of refraction of glass is 1.5 . The intensity I of light emerging from the prism is:

A circularly polarized light incident on a prism

A Circularly Polarized Light Incident on a Prism

Figure shows circularly polarized light with intensity I0 is incident normally on a glass prism.

(June)

Choices

Choice (4) Response
a.

0.92I0

b.

I0

c.

0.96I0

d.

0.88I0

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