BEE FREE BEE Bachelor of Electrical Engineering Engineering Electromagnetics Fundamentals Questions and Answers 2

Question 1

A parallel-plate capacitor with plate area A and separation d is filled with a dielectric of permittivity ε. What is the capacitance?

Accepted Answer

εA/d

Answer

εd/A

Answer

A/(εd)

Answer

d/(εA)

Question 2

What is the divergence of the electric field in a region containing volume charge density ρ_v according to Gauss's law in differential form?

Accepted Answer

ρ_v / ε₀

Answer

ε₀ / ρ_v

Answer

ρ_v × ε₀

Answer

Zero

Question 3

A conducting loop moves through a uniform, time-invariant magnetic field. What is the induced EMF in the loop?

Accepted Answer

Zero

Answer

Maximum

Answer

Equal to the flux

Answer

Dependent on loop resistance

Question 4

Which boundary condition holds for the tangential component of the electric field at an interface between two perfect dielectrics?

Accepted Answer

E_t1 = E_t2

Answer

D_t1 = D_t2

Answer

E_t1 = 0

Answer

ε₁E_t1 = ε₂E_t2

Question 5

What is the skin depth in a good conductor proportional to?

Accepted Answer

1/√(πfμσ)

Answer

√(πfμσ)

Answer

πfμσ

Answer

1/(πfμσ)

Question 6

In a lossless transmission line, what is the characteristic impedance Z₀ expressed in terms of distributed inductance L and capacitance C per unit length?

Accepted Answer

√(L/C)

Answer

√(C/L)

Answer

L/C

Answer

LC