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# GATE EE 2021 : Electromagnetic theory Quiz 4

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Question 1

Biot–Savart law is the magnetic equivalent of Coulomb’s law. The difference is

Question 2

The relation between the magnetic vector potential and the magnetic field intensity can be given by

Question 3

In a spherical co-ordinate system magnetic vector potential at point (r, θ, ϕ) is given as A = 12 cosθa

_{ϕ}. The magnetic flux density at point (3, 0, ) will beQuestion 4

A vector magnetic potential is given by

The magnetic flux density at (2, π, 0) will be

Question 5

Find the flux density at B| (3,) if the given magnetic vector potential A= 8sin sphericalco-ordinates?

Question 6

A magnetic material has the following parameters:

(i) M=120A/m and μ= 2 x 10^{-4}H/m.

(ii) B=200μT, X_{m}= 15

Determine magnetic field intensity and magnetic flux density for both (i) and (ii)

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Nov 1ESE & GATE EE

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