Electromagnetics Field (3140912) MCQs

MCQs of Steady Magnetic Fields

Showing 11 to 20 out of 43 Questions
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11.
What will be the magnetic field of a finite current element with 2A current and height 1/2π m?
(a) 1 A/m
(b) 2 A/m
(c) 0.5 A/m
(d) 0.25 A/m
Answer:

Option (a)

12.
The current element of the solenoid of turns 100, length 2m and current 0.5A is given by
(a) 100 dx
(b) 200 dx
(c) 25 dx
(d) 50 dx
Answer:

Option (c)

13.
A current filament of 3āx A lies along x-axis. The component H at P(−1,3,2) is
(a) −73āy−109āz mA/m
(b) −73āy+109āz mA/m
(c) 73āy+109āz A/m
(d) −73āy+109āz A/m
Answer:

Option (b)

14.
A circular loop located at x2 + y2 = 9, z = 0 carries a direct current of 10 A along āΦ. The value of H at P(0,0,4) is
(a) 0.36āx A/m
(b) 0.36āy A/m
(c) 0.36āz A/m
(d) None of above
Answer:

Option (c)

15.
In a certain conducting region,H = yz(x2 + y2)āx−xzy2āy+x2y2āz A/m then current density J at P(5,2,−3) is
(a) −420āx+102āy+123āz A/m2
(b) 420āx+102āy+123āz A/m2
(c) 420āx−102āy+123āz A/m2
(d) −420āx−102āy−123āz A/m2
Answer:

Option (c)

16.
The point form of Ampere's law is
(a) Curl(B) = I
(b) Curl(D) = J
(c) Curl(H) = J
(d) Curl(V) = I
Answer:

Option (c)

17.
Ampere's law is based on
(a) Biot Savart's law
(b) Gauss law
(c) Stoke’s theorem
(d) Maxwell theorem
Answer:

Option (c)

18.
The divergence of magnetic field intensity (H) is
(a) 1
(b) −1
(c) 0
(d) ∞
Answer:

Option (c)

19.
Select the correct relation for ∫H•dL = 0
(a) E = –Grad(V)
(b) B = –Grad(D)
(c) H = –Grad(Vm)
(d) D = –Grad(A)
Answer:

Option (c)

20.
Magnetic flux density of the material with magnetic vector potential, A = yāx+zāy+xāz is
(a) āx+āy+āz
(b) −āx−āy−āz
(c) −āx+āy−āz
(d) āx−āy+āz
Answer:

Option (b)

Showing 11 to 20 out of 43 Questions
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