Explore topic-wise MCQs in Electrical Engineering.

This section includes 682 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering knowledge and support exam preparation. Choose a topic below to get started.

101.

m/s.

A. 16.67
B. 2400
C. 2880
D. 0.06
Answer» C. 2880
Discussion
102.

units.

A. 200
B. 50
C. 400
D. 0.02
Answer» B. 50
Discussion
103.

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» C. 3.197i + 2.393j + 4.472k
Discussion
104.

, -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» B. 2.467i – j + 1.167k
Discussion
105.

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» B. -3.6j + 4k
Discussion
106.

-10 units)

A. 2.1
B. 2.33
C. 2.5
D. 2.77
Answer» D. 2.77
Discussion
107.

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» D. 1/4.5
Discussion
108.

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» C. 11/3
Discussion
109.

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» B. 1
Discussion
110.

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» E.
Discussion
111.

m from the ring.

A. 18Ï€
B. 24Ï€
C. 36Ï€
D. 72Ï€
Answer» E.
Discussion
112.

,1,3).

A. 105
B. 106
C. 107
D. 108
Answer» C. 107
Discussion
113.

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

A. 0.03
B. 0.05
C. 0.07
D. 0.09
Answer» E.
Discussion
114.

14 units?

A. 1
B. 0.75
C. 0.5
D. 0.25
Answer» E.
Discussion
115.

,1,1)m?

A. 10-6
B. -10-6
C. 106
D. -106
Answer» C. 106
Discussion
116.

πεh).aN. State True/False.

A. true
B. false
Answer» B. false
Discussion
117.

cm in vacuum(in 10-8C)

A. 4
B. 2
C. 8
D. 6
Answer» B. 2
Discussion
118.

cm and minimises as d increases. State True/False

A. true
B. false
Answer» B. false
Discussion
119.

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» E.
Discussion
120.

= 9.

A. 120Ï€
B. 180Ï€
C. 240Ï€
D. 300Ï€
Answer» C. 240Ï€
Discussion
121.

j.

A. 20
B. 70/3
C. 80/3
D. 30
Answer» D. 30
Discussion
122.

in volume integral.

A. 80 π
B. 5 π
C. 75 π
D. 85 π
Answer» D. 85 Ï€
Discussion
123.

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

A. 10
B. 12
C. 14
D. 16
Answer» C. 14
Discussion
124.

πε) ln(b/a). State True/False.

A. true
B. false
Answer» B. false
Discussion
125.

, hence find charge using volume integral.

A. 6100 π
B. 6200 π
C. 6300 π
D. 6400 π
Answer» E.
Discussion
126.

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

A. 600
B. 599.8
C. 588.9
D. 577.8
Answer» D. 577.8
Discussion
127.

i + 2xy j + 5xz2 k

A. √4.01
B. √4.02
C. √4.03
D. √4.04
Answer» E.
Discussion
128.

+ z2 at (1,1,1)

A. i + j + k
B. 2i + 2j + 2k
C. 2xi + 2yj + 2zk
D. 4xi + 2yj + 4zk
Answer» C. 2xi + 2yj + 2zk
Discussion
129.

/x) j + 5 k.

A. -8.014
B. -8.114
C. -8.214
D. -8.314
Answer» D. -8.314
Discussion
130.

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» C. i + 0.135j + 10k
Discussion
131.

,2,5) is (in Joule)

A. 0.64
B. 0.72
C. 0.78
D. 0.80
Answer» C. 0.78
Discussion
132.

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» D. 4
Discussion
133.

The value of ∫ H.dL will be

A. j
B. i
C. b
D. h
Answer» C. b
Discussion
134.

Find the displacement current density of a material with flux density of 5sin t

A. 2.5cos t
B. 2.5sin t
C. 5cos t
D. 5sin t
Answer» D. 5sin t
Discussion
135.

Find the magnetic field intensity when the magnetic vector potential x i + 2y j + 3z k.

A. 6
B. -6
C. 1
Answer» C. 1
Discussion
136.

The Laplacian of the magnetic vector potential will be

A. –μ j
B. – μ i
C. –μ b
D. –μ h
Answer» B. – μ i
Discussion
137.

Which of the following identities is always zero for static fields?

A. grad(curl v)
B. curl(div v)
C. div(grad v)
D. curl(grad v)
Answer» E.
Discussion
138.

The curl of the electric field intensity is

A. conservative
B. rotational
C. divergent
D. static
Answer» C. divergent
Discussion
139.

The attenuation is given by 20 units. Find the power loss in decibels.

A. 13.01
B. 26.02
C. 52.04
D. 104.08
Answer» B. 26.02
Discussion
140.

The current reflection coefficient is given by -0.75. Find the voltage reflection coefficient.

A. -0.75
B. 0.25
C. -0.25
D. 0.75
Answer» E.
Discussion
141.

The incident and the reflected voltage are given by 15 and 5 respectively. The transmission coefficient is

A. 1/3
B. 2/3
C. 1
D. 3
Answer» C. 1
Discussion
142.

The power reflected by a wave with incident power of 16 units is(Given that the reflection coefficient is 0.5)

A. 2
B. 8
C. 6
D. 4
Answer» E.
Discussion
143.

The power of the electromagnetic wave with electric and magnetic field intensities given by 12 and 15 respectively is

A. 180
B. 90
C. 45
D. 120
Answer» C. 45
Discussion
144.

The power of a wave of with voltage of 140V and a characteristic impedance of 50 ohm is

A. 1.96
B. 19.6
C. 196
D. 19600
Answer» D. 19600
Discussion
145.

Find the conductivity of a material with conduction current density 100 units and electric field of 4 units.

A. 25
B. 400
C. 0.04
D. 1600
Answer» B. 400
Discussion
146.

Calculate the displacement current density when the electric flux density is 20sin 0.5t.

A. 10sin 0.5t
B. 10cos 0.5t
C. 20sin 2t
D. 20cos 2t
Answer» C. 20sin 2t
Discussion
147.

Find the flux enclosed by a material of flux density 12 units in an area of 80cm.

A. 9.6
B. 12/80
C. 80/12
D. 12/0.8
Answer» B. 12/80
Discussion
148.

In metals which of the following equation will hold good?

A. curl(h) = j
B. curl(j) = dd/dt
C. curl(h) = d
D. curl(j) = db/dt
Answer» B. curl(j) = dd/dt
Discussion
149.

Find the electric flux density of a material with charge density 16 units in unit volume.

A. 1/16
B. 16t
C. 16
D. 162
Answer» D. 162
Discussion
150.

The charge build up in the capacitor is due to which quantity?

A. conduction current
B. displacement current
C. convection current
D. direct current
Answer» C. convection current
Discussion