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Electromagnetic Field Theory

Electromagnetic Field Theory
If E is the electric field intensity, then what is the value of divergence of (curl of E)?

 Null vector.
 | E |.
 Zero.
 E.

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Electromagnetic Field Theory
A loop is rotating about x-axis in a magnetic field, B = BO cos(ω + φ) ay. The voltage in the loop is

 Due to both rotating and transformer action.
 Due to rotating only.
 Due to transformer only.
 Zero.

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Electromagnetic Field Theory
The radiation pattern of a parabola antenna is

Omnidirectional
Highly directional
None of these
A figure of directional

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Electromagnetic Field Theory
A long straight wire carries a current I = 10A. At what distance is the magnetic field H = 1A/m?

 1.19 m.
 1.39 m.
 1.29 m.
 1.59 m.

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Electromagnetic Field Theory
Which of the following represents ohms law

 V = RI
 J = σE
 I = GV
All of these

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Electromagnetic Field Theory
Magnetic circuit with cross sectional area of 20 cm2 is to be operated at 50 Hz from 120 Vrms supply. The number of turns required to active a peak magnetic flux density of 1.8 T in the core flux is

 150.
 450.
 300.
 600.

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MORE MCQ ON Electromagnetic Field Theory

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