ELECTROMAGNETIC FIELD THEORY QUIZ

The magnitude of the induced emf in a conductor depends upon on the

amount of flux cut.

rate of change of flux linkage.

flux density of the magnetic field.

amount of flux linkage.

TRUE ANSWER : ?
YOUR ANSWER : ?

The minimum height of outer atmosphere is

150 km

100 km

200 km

400 km

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Two coils have inductances L1 = 1200 mH and L2 = 800 mH. They are connected in such a way that flux in the two coils aid each other and inductance is measured to be 2500 mH, then Mutual inductance between the coils is ___________ mH.

250.

145.

150.

225.

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YOUR ANSWER : ?

The critical frequency of ‘F’ layer is greater than 30 MHz.

True

False

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________ at a point is defined as the force experienced per unit positive charge at a point placed in the electric field.

Electric flux.

Electric intensity.

None of these

Magnetic flux density.

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The potential that appears at a point in space due to the current which caused it is called potential

Retardation

Oscillating

Lagging the current

Accelerating

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Plane z = 10 m carries charge 20 C/m2. The electric field intensity at the origin is

– 72 πuz v/m.

– 10 uz v/m.

– 18 πuz v/m.

– 360 πuz v/m.

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YOUR ANSWER : ?

Which antenna is a wideband antenna?

Hertz antenna

None of these

Folded dipole

Marconi antenna

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An infinite sheet has a charge density of 150 μ C/m. The flux density in μ C/m 2 is

1/75.

100.

50.

75.

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A conductor is rotating with in a magnetic field. At which of the positions do the peak voltages occur?

Along the axis of the magnetic field.

At right angles to the axis of the magnetic field.

At an angle of 45° to the axis of the magnetic field.

Anywhere.

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YOUR ANSWER : ?

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