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Electromagnetic Field Theory

Electromagnetic Field Theory
For an inductor, current is proportional to

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

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Electromagnetic Field Theory
The inductance of a long solenoid of length 1000 mm wound uniformly with 3000 turns on a cylindrical paper cable of 60 mm diameter is

 32 mH.
 3.2 µH.
 3.2 H.
 3.2 mH.

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Electromagnetic Field Theory
A plane wave magnetic field is represented by Bx = cos(y – ct). The electric and magnetic fields will be zero in the direction

 None of these.
 Ex = Ey = 0, Bx = By = 0.
 Ey = Ez = 0, By = Bz = 0.
 Ex = Ey = 0, By = Bz = 0.

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Electromagnetic Field Theory
If in a 1 mF capacitor, an instantaneous displacement current of 1 A is to be established in the spaces between its plates then it is possible by applying

 106 Amp/sec.
 106 volts/sec.
 106 volts.
 106 Amp.

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Electromagnetic Field Theory
1 Maxwell is the same as

 10-4 weber.
 10-8 weber.
 104 weber.
 10-8 weber.

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Electromagnetic Field Theory
Cork Screw rule is used to find

 direction of electric field.
 direction of current.
 direction of magnetic field.
 direction of emf.

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