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Electromagnetic Field Theory

Electromagnetic Field Theory
A voltage waveform V(t) = 12t2 is applied across a 1H inductor for t = 0, with initial current through it being zero. The current through the inductor for t = 0 is given by

 4t3.
 12t3.
 12t.
 24t.

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Electromagnetic Field Theory
An electric field on a place described by its potential V = 20 (r -1 + r-2) where r is the distance from the source. The field is due to

 A dipole.
 Both of A and B.
 A monopole.
 A quardra pole.

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Electromagnetic Field Theory
A coil of 300 turns is wound on a non-magnetic core having a mean circumference of 300 mm and a cross sectional area of 300 mm2. The current of 3 A will be

 37.68 µH.
 113.04 mH.
 113.04 µH.
 37.68 mH.

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Electromagnetic Field Theory
A charge which when placed in vacuum from an equal and similar charge repels with a force of 9 × 103 N, is known as

 micro - coulomb.
 coulomb.
 milli - coulomb.
 pico - coulomb.

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Electromagnetic Field Theory
Two coils are coupled in such a way that the mutual inductance between them is 20 mH. If the inductances of the coils are 40 mH and 50 mH respectively, the coefficient of coupling is

 0.577.
 0.477.
 0.447.
 0.01.

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Electromagnetic Field Theory
A vector field A = p In is given in Cartesian coordinates. In cylindrical coordinates it will be represented as

 A = cosφ Ir.
 A = cosφ Ir + sinφ Iφ.
 A = cosφ Ir - sinφ Ir.
 A = sinφ Ir.

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MORE MCQ ON Electromagnetic Field Theory

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