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Electromagnetic Field Theory

Electromagnetic Field Theory
For an inductor, current is proportional to

 voltage across the inductor.
 magnetic field.
 none of them.
 both (A) and (B).

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Electromagnetic Field Theory
A conductor of length 100 cm moves at right angles to a magnetic field of flux density 1.5 Wb/m2 with a velocity of 50 m/s. The induced emf in the conductor will be

 75 V.
 37.5 V.
 50 V.
 150 V.

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Electromagnetic Field Theory
A satellite that simply reflect back the signals from one region of the earth to the other region is known as

Active satellite
Passive satellite
Geostationary satellite
Orbiting satellite

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Electromagnetic Field Theory
Which antenna is a wideband antenna?

Folded dipole
None of these
Marconi antenna
Hertz antenna

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Electromagnetic Field Theory
A sphere of 20 cm radius contains electrical charge of density 2/(r sinθ) c/m3. What is the total charge contained within the sphere?

 0.335/sinθ c.
 0.
 None of above.
 0.335 C.

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Electromagnetic Field Theory
Which of the following impedance inversion is obtained?

A half wave line
Short-circuited stub
Balun transformer
A quarter wave line

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