Electromagnetics Field (3140912) MCQs

MCQs of Time varying fields and Maxwell’s equations

Showing 21 to 30 out of 35 Questions
1 2 3 4
21.
Both the conduction and displacement current densities coexist in
(a) Only conductors in air
(b) Only dielectrics in air
(c) Conductors placed in any dielectric medium
(d) Never coexist
Answer:

Option (c)

22.
What is curl of E for B = 15t?
(a) 15
(b) −15
(c) 7.5
(d) −7.5
Answer:

Option (b)

23.
The charge build up in a capacitor is due to
(a) Conduction current density
(b) Displacement current density
(c) Polarization
(d) Magnetization
Answer:

Option (b)

24.
Surface integral is zero for
(a) Electric field intensity
(b) Electric flux density
(c) Magnetic flux density
(d) Magnetic field intensity
Answer:

Option (c)

25.
For zero electric potential, electric field intensity is
(a) 0
(b) 1
(c) dA/dt
(d) −dA/dt
Answer:

Option (d)

26.
Gradient of the magnetic vector potential is
(a) −μεdV/dt
(b) μεdE/dt
(c) −μεdA/dt
(d) μεdB/dt
Answer:

Option (a)

27.
The charge density of a electrostatic field is
(a) Curl(E)
(b) Div(E)
(c) Curl(D)
(d) Div(D)
Answer:

Option (d)

28.
Divergence of the electric flux density in free space is
(a) 1
(b) 0
(c) −1
(d) ∞
Answer:

Option (b)

29.
The line integral of the electric field intensity is
(a) Mmf
(b) Emf
(c) Electric potential
(d) Magnetic potential
Answer:

Option (b)

30.
Which of the following relations is correct?
(a) Mmf = ∫B•dl
(b) Mmf = ∫H•dl
(c) Emf = ∫E•dl
(d) Emf = ∫D•dl
Answer:

Option (c)

Showing 21 to 30 out of 35 Questions
1 2 3 4