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600+ Electromagnetics Solved MCQs

These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Electrical Engineering .

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551.

The value of ∫ H.dL will be

A. j
B. i
C. b
D. h
Answer» B. i
discuss
552.

Given the vector potential is 16 – 12sin y j. Find the field intensity at the origin.

A. 28
B. 16
C. 12
D. 4
Answer» C. 12
discuss
553.

The Laplacian of the magnetic vector potential will be

A. –μ j
B. – μ i
C. –μ b
D. –μ h
Answer» A. –μ j
discuss
554.

Find the gradient of t = x2y+ ez at the point p(1,5,-2)

A. i + 10j + 0.135k
B. 10i + j + 0.135k
C. i + 0.135j + 10k
D. 10i + 0.135j + k
Answer» B. 10i + j + 0.135k
discuss
555.

+ z2 at (1,1,1)

A. i + j + k
B. 2i + 2j + 2k
C. 2xi + 2yj + 2zk
D. 4xi + 2yj + 4zk
Answer» B. 2i + 2j + 2k
discuss
556.

i + 2xy j + 5xz2 k

A. √4.01
B. √4.02
C. √4.03
D. √4.04
Answer» D. √4.04
discuss
557.

,2,5) is (in Joule)

A. 0.64
B. 0.72
C. 0.78
D. 0.80
Answer» B. 0.72
discuss
558.

/x) j + 5 k.

A. -8.014
B. -8.114
C. -8.214
D. -8.314
Answer» C. -8.214
discuss
559.

πε) ln(b/a). State True/False.

A. true
B. false
Answer» A. true
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560.

i in spherical coordinates with r = 4m and θ = π/2.

A. 600
B. 599.8
C. 588.9
D. 577.8
Answer» C. 588.9
discuss
561.

and 1, y = 0 and 2, z = 0 and 3.

A. 10
B. 12
C. 14
D. 16
Answer» B. 12
discuss
562.

in volume integral.

A. 80 π
B. 5 π
C. 75 π
D. 85 π
Answer» C. 75 π
discuss
563.

, hence find charge using volume integral.

A. 6100 π
B. 6200 π
C. 6300 π
D. 6400 π
Answer» D. 6400 π
discuss
564.

j.

A. 20
B. 70/3
C. 80/3
D. 30
Answer» C. 80/3
discuss
565.

= 9.

A. 120π
B. 180π
C. 240π
D. 300π
Answer» B. 180π
discuss
566.

5cm apart in transformer oil(εr=2.2) in 10-4 N,

A. 8.15
B. 5.18
C. 1.518
D. 1.815
Answer» D. 1.815
discuss
567.

5 X 10-7 C, both the charges are in vacuum.

A. 0.03
B. 0.05
C. 0.07
D. 0.09
Answer» D. 0.09
discuss
568.

cm in vacuum(in 10-8C)

A. 4
B. 2
C. 8
D. 6
Answer» A. 4
discuss
569.

cm and minimises as d increases. State True/False

A. true
B. false
Answer» A. true
discuss
570.

Electric field of an infinitely long conductor of charge density λ, is given by E =λ/(2πεh).aN. State True/False

A. true
B. false
Answer» A. true
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571.

,1,1)m?

A. 10-6
B. -10-6
C. 106
D. -106
Answer» B. -10-6
discuss
572.

14 units?

A. 1
B. 0.75
C. 0.5
D. 0.25
Answer» D. 0.25
discuss
573.

Find the potential of V = 60sin θ/r2 at P(3,60,25)

A. 5.774
B. 6.774
C. 7.774
D. 8.774
Answer» A. 5.774
discuss
574.

,1,3).

A. 105
B. 106
C. 107
D. 108
Answer» B. 106
discuss
575.

What is the potential difference between 10sinθcosφ/r2 at A(1,30,20) and B(4,90,60)?

A. 2.386
B. 3.386
C. 4.386
D. 5.386
Answer» C. 4.386
discuss
576.

m from the ring.

A. 18π
B. 24π
C. 36π
D. 72π
Answer» D. 72π
discuss
577.

at R = 4m and σ = -3 at R = 5m. Find the flux density at R = 1m.

A. 0
B. 1
C. 2
D. 3
Answer» A. 0
discuss
578.

at R = 4m and σ = -3 at R = 5m. Find the flux density at R = 3m.

A. 3
B. 10/3
C. 11/3
D. 4
Answer» B. 10/3
discuss
579.

at R = 4m and σ =-3 at R = 5m. Find the flux density at R = 4.5m.

A. 4/4.5
B. 3/4.5
C. 2/4.5
D. 1/4.5
Answer» C. 2/4.5
discuss
580.

at R = 4m and σ = -3 at R = 5m. Find the flux density at R = 6m.

A. 17/6
B. -17/6
C. 13/6
D. -13/6
Answer» D. -13/6
discuss
581.

Find the electric potential for an electric field 3units at a distance of 2m.

A. 9
B. 4
C. 6
D. 3/2
Answer» C. 6
discuss
582.

-10 units)

A. 2.1
B. 2.33
C. 2.5
D. 2.77
Answer» C. 2.5
discuss
583.

Transform the vector A = 3i – 2j – 4k at P(2,3,3) to cylindrical coordinates

A. -3.6j – 4k
B. -3.6j + 4k
C. 3.6j – 4k
D. 3.6j + 4k
Answer» A. -3.6j – 4k
discuss
584.

, -2)

A. 2.467i + j + 1.167k
B. 2.467i – j + 1.167k
C. 2.467i – j – 1.167k
D. 2.467i + j – 1.167k
Answer» A. 2.467i + j + 1.167k
discuss
585.

Transform the vector (4,-2,-4) at (1,2,3) into spherical coordinates.

A. 3.197i – 2.393j + 4.472k
B. -3.197i + 2.393j – 4.472k
C. 3.197i + 2.393j + 4.472k
D. -3.197i – 2.393j – 4.472k
Answer» B. -3.197i + 2.393j – 4.472k
discuss
586.

units.

A. 500
B. 250
C. 1000
D. 2000
Answer» C. 1000
discuss
587.

m/s.

A. 16.67
B. 2400
C. 2880
D. 0.06
Answer» B. 2400
discuss
588.

units.

A. 200
B. 50
C. 400
D. 0.02
Answer» A. 200
discuss
589.

units and E = 8 units.

A. 1.77
B. 2.25
C. 36
D. 144
Answer» C. 36
discuss
590.

units.

A. 3
B. 2
C. 60
D. 2.4
Answer» C. 60
discuss
591.

Find the permittivity of the surface when a wave incident at an angle 60 is reflected by the surface at 45 in air

A. 1.41
B. 3.5
C. 2.2
D. 1.73
Answer» D. 1.73
discuss
592.

kV.

A. 350n
B. 0.035kn
C. 0.035n
D. 3.35kn
Answer» C. 0.035n
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593.

kV. Find „a‟.

A. 1m
B. 1cm
C. 10cm
D. 1mm
Answer» D. 1mm
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594.

kV. Find „a‟.

A. 10mm
B. 100mm
C. 1000m
D. 1000cm
Answer» D. 1000cm
discuss
595.

The unit for dielectric strength is ____________

A. v/m2
B. mv/m2
C. mv/m
D. vm
Answer» C. mv/m
discuss
596.

m, calculate the dielectric strength.

A. 2mv/m
B. 4mv/m
C. 6mv/m
D. 8mv/m
Answer» A. 2mv/m
discuss
597.

Leakage in capacitors is primarily caused by _________

A. transistors
B. resistors
C. inductors
D. dc motors
Answer» A. transistors
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598.

The flow of electrons in dielectric is due to _________

A. conduction
B. potential difference
C. breakdown
D. resistance
Answer» C. breakdown
discuss
599.

Displacement current depends on ___________

A. moving charges
B. change in time
C. both moving charges and change in time
D. neither moving charges nor change in time
Answer» B. change in time
discuss
600.

Paper capacitor is a type of _________

A. fixed capacitor
B. variable capacitor
C. either fixed or variable depending on its usage
D. neither fixed nor variable
Answer» A. fixed capacitor
discuss

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