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Electromagnetic Field Theory

Electromagnetic Field Theory
Which of following circuit element stores energy in electro-magnetic field?

 Inductor.
 Capacitor.
 Variable Resistor.
 Condenser.

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Electromagnetic Field Theory
How much current must flow in a loop of radius 1m to produce a magnetic field of 1 mA/m?

 1.5 mA.
 2.5 mA.
 1mA.
 2 mA.

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Electromagnetic Field Theory
inductance (L2) in parallel without mutual coupling will be

 10 mH.
 5 mH.
 20 mH.
 15 mH.

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Electromagnetic Field Theory
The energy stored in the magnetic field at a solenoid 30 cm long and 3 cm diameter wound with 1000 turns of wire carrying an current at 10 A, is

 0.015 J.
 0.15 J.
 1.15 J.
 0.5 J.

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Electromagnetic Field Theory
1 Tesla =

 1 wb .
 1 wb- m2.
 1 wb/m.
 1 wb/ m2.

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Electromagnetic Field Theory
A magnetic material has a total flux B of 80 micro Wb with an mmf of 160 AT. The reluctance in ampere turn per weber is

 2 × 106.
 2 × 10-6.
 2 × 10-8.
 2 × 108.

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