Electromagnetics Field (3140912) MCQs

MCQs of Time varying fields and Maxwell’s equations

Showing 1 to 10 out of 35 Questions
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1.
Maxwell’s first equation in free space is
(a) ∇×H = D+J
(b) ∇×H = D
(c) ∇×H = 0
(d) ∇×H = J
Answer:

Option (b)

2.
For static magnetic field
(a) ∇×B = ρ
(b) ∇×B = μJ
(c) ∇•B = μ0J
(d) ∇×B = 0
Answer:

Option (b)

3.
The electric field in free space is
(a) D/ε0
(b) D/μ0
(c) ε0D
(d) σ/ε0
Answer:

Option (a)

4.
Displacement current density is
(a) D
(b) J
(c) ∂D/∂t
(d) ∂J/∂t
Answer:

Option (c)

5.
The time varying electric field is
(a) E = −∇V
(b) E = −∇V − A
(c) E = −∇V − B
(d) E = −∇V − D
Answer:

Option (b)

6.
A field can exist if it satisfies
(a) Gauss’s law
(b) Faraday’s law
(c) Coulomb’s law
(d) All Maxwell’s equations
Answer:

Option (d)

7.
If σ = 2 ℧/m, E = 10 V/m, the conduction current density is
(a) 5 A/m2
(b) 20 A/m2
(c) 40 A/m2
(d) 30 A/m2
Answer:

Option (b)

8.
Maxwell’s equations give the relations between
(a) Different fields
(b) Different sources
(c) Different boundary conditions
(d) None of above
Answer:

Option (a)

9.
The boundary condition on E is
(a) an×(E1− E2) = 0
(b) an•(E1− E2) = 0
(c) E1 = E2
(d) None of above
Answer:

Option (a)

10.
The boundary conditions on H is
(a) an×(H1− H2) = Js
(b) an•(H1− H2) = Js
(c) H1 = H2
(d) None of above
Answer:

Option (b)

Showing 1 to 10 out of 35 Questions
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