Free Printable EMT QUIZ

1.

Which of the following statements are incorrect?

a)

Displacement current exists inside perfect solid conductor

b)

Displacement current exists inside a perfect sheet of conductor

c)

Current density and current are directly proportional

d)

Current density and current are indirectly proportional

2.

Which of the following is not described in Faraday's experiment?

a)

Change in magnetic flux linkage

b)

Electromotive force

c)

Static Electric field

d)

Number of turns in a closed circuit

3.

The concept of displacement current was a major contribution attributed to

a)

Faraday

b)

Gauss

c)

Ampere

d)

Maxwell

4.

Which one of the following is correct?

a)

Pointing vector is a power density vector.

b)

Faraday discovered conduction current density

c)

Ampere discovered Electromagnetic induction

d)

Gauss law relates curl of magnetic field

5.

According to Amperes law

a)

Total electric flux is equal to electric charge

b)

Total magnetic flux is equal to electric charge

c)

Total magnetic flux is equal to total current

d)

Total electric flux is equal to total current

6.

a)

b)

c)

d)

7.

A material has a conductivity of 0.01mho/m and a relative permittivity of 4. The frequency at which conduction current in the medium is equal to the displacement current is

a)

400 MHz

b)

90 MHz

c)

45 MHz

d)

900 MHz

8.

In an Electromagnetic wave the Electric field lies along X direction and the wave is propagating along Y direction, then the direction of Magnetic field is,

a)

Along positive Z direction

b)

Along negative X direction

c)

Along positive X direction

d)

Along negative Z direction

9.

Which of the following represents continuity of current?

a)

$∇.H⃗=0$

b)

$∇.J⃗=-(∂ρ_v)/∂t$

c)

$∇×E⃗=-(∂B⃗)/∂t$

d)

$∇×H⃗=I$

10.

Inconsistency in the Ampere's circuit law for time varying fields is eliminated by introducing.

a)

Conduction current density

b)

Transformer e.m.f.

c)

A combination of motional & transformer e.m.f.

d)

None of these

11.

A time varying field is applied to a circuit

with a capacitor

a)

The current in the circuit consists of conduction current and displacement current

b)

The displacement current passes through the capacitor

conduction

c)

current is equal to displacement current

d)

all of the above

12.

For static electric and magnetic fields in an inhomogeneous source-free medium, which of the following represents the correct form of two of Maxwell's equations?

a)

$∇.E=0,∇×B=J$

b)

$∇×E=0,∇.B=0$

c)

$∇.E=0,∇×B=J$

d)

$∇.E=0,∇×B=0$

13.

The charge builds up in a capacitor is due to

a)

Conduction current density

b)

Displacement current density

c)

Convection current density

d)

Polarisation

14.

Find the curl of E when B is given as 15t.

a)

15

b)

-15

c)

7.5

d)

-7.5

EMT QUIZ

Total questions: 14

Worksheet time: 16mins

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