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Electromagnetic Field Theory

Electromagnetic Field Theory
The minimum height of outer atmosphere is

200 km
150 km
100 km
400 km

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Electromagnetic Field Theory
Which of the following is zero in relation to electromagnetic fields?

 Div grad V.
 Curl curl A.
 Grad div A.
 Div curl A.

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Electromagnetic Field Theory
If the resistance of a conductor does not vary in accordance with the Ohms law it is known as

 non - linear conductor.
 non - conductor.
 bad conductor.
 reverse conductor.

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Electromagnetic Field Theory
An emf of 16 volts is induced in a coil of inductance 4 H. The rate of change of current must be

 16 A / s.
 32 A / s.
 4 A / s.
 64 A / s.

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Electromagnetic Field Theory
Due to which of the following reasons a lightning conductor on top of a building is made into a pointed spike?

None of these
Dust particles may not accumulate
Charge per unit area becomes very high for lightening to discharge
Rain drops may not collect

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Electromagnetic Field Theory
In free space E (z, t) = 103 sin(ωt - βz) uy v/m. What is the value of H (z, t)

 (103/377) cos(ωt - β z)(-ux) A/m.
 None of above.
 (103/377) sin(ωt - β z)(-ux) A/m.
 (103/377) sin(ωt - β z)(ux) A/m.

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MORE MCQ ON Electromagnetic Field Theory

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