Electromagnetic Theory (CSIR Physical Sciences): Questions 11 - 13 of 57

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 401 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 300.00 or

Question number: 11

» Electromagnetic Theory » Electrostatics: Gauss's Law and Its Applications

Appeared in Year: 2014

MCQ▾

Question

Consider an electromagnetic wave at the interface between two homogeneous dielectric media of dielectric constant ε1 and ε2 . Assuming ε2>ε1 and no charge on the surface, the electric field vector E and the displacement vector D in the two media satisfy the following inequalities – (June)

Choices

Choice (4) Response

a.

E2 < E1 and D2 < D1

b.

E2 < E1 and D2 > D1

c.

E2 > E1 and D2 > D1

d.

E2 > E1 and D2 < D1

Question number: 12

» Electromagnetic Theory » Scalar and Vector Potentials

Appeared in Year: 2012

MCQ▾

Question

The magnetic field corresponding to the vector potential A=12F×r+10r3r where F is a constant vector, is – (June)

Choices

Choice (4) Response

a.

F

b.

F

c.

F+30r4r

d.

F30r4r

Question number: 13

» Electromagnetic Theory » Gauge Invariance

Appeared in Year: 2013

MCQ▾

Question

Let (V, A) and (V’, A’) denote two sets of scalar and vector potentials, and ψ a scalar function. Which of the following transformations level the electric and magnetic field (and hence Maxwell’s equations) unchanged? (December)

Choices

Choice (4) Response

a.

A=A2ψandV=Vψt

b.

A=AψandV=V+2ψt

c.

A=A+ψandV=Vψt

d.

A=A+ψandV=V+ψt

Sign In