Generate Quiz 6997FF686C396

1 / 10

Lorentz force in electric and magnetic field is ______.

Elimination Tool

A) F = qv(E+B)

B) F = qE(v+B)

C) F = qvB

D) F = q(E+vB)

2 / 10

A coil of 600 turns is threaded by a flux of 8×10-5 webers if this flux is reduced to 3×10-5 webers in 0.015 seconds. The average induced e.m.f. is:

Elimination Tool

A) -2.0 volts

B) -3.0 volts

C) +2.0 volts

D) +2.5 volts

3 / 10

The insulation between sheets of the transformer core is to get small.

Elimination Tool

A) Hysteresis loop

B) Eddy current

C) Both

D) None of these

4 / 10

Magnetic flux is a scalar product of _____.

Elimination Tool

A) B and V

B) B and A

C) B and I

D) None of these options are correct

5 / 10

The emf induced in a circuit according to Faraday’s law depends on the:

Elimination Tool

A) Maximum magnetic flux

B) Initial magnetic flux

C) Change in magnetic flux

D) The rate of change of magnetic flux

6 / 10

Two α-particles have the ratio of their velocities as 3 : 2 on entering the field. If they move in different circular paths, then the ratio of the radii of their paths is:

Elimination Tool

A) 2 : 3

B) 3 : 2

C) 4 : 9

D) 9 : 4

7 / 10

If a charge of 2C is moving with 5m/s enter at 30° in 3 T, calculate the force experienced by it.

Elimination Tool

A) 10N

B) 15N

C) 20N

D) 30N

8 / 10

Electron charge in accelerating motion will produce ______.

Elimination Tool

A) Electric field

B) Magnetic field

C) EM waves

D) None of these

9 / 10

The turns ratio of transformer is 10. It means that ____.

Elimination Tool

A) Is=10Ip

B) Ns=Np/10

C) Ns=10Np

D) Vs=Vp/10

10 / 10

If number of loops are increased than according to Faraday law ____ will increase.

Elimination Tool

A) Voltage

B) Electric field

C) Magnetic field

D) All of these

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