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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

 12t.
 24t.
 12t3.
 4t3.

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Electromagnetic Field Theory
1 Maxwell is the same as

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

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Electromagnetic Field Theory
The electrical field strength at a distance point A due to a point charge +q, located at the origin, is 100 µl v/m. If the point charge is now enclosed by a perfectly conducting metal sheet sphere whose centre is at origin, A, outside the sphere, becomes

 None of above.
 100 μ v/m.
 0.
 - 100 μ v/m.

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Electromagnetic Field Theory
Ohm’s law in point from field theory can be expressed as

 R = ρ × ( l / A).
 J = σE.
 V = IR.
 J = E / σ.

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Electromagnetic Field Theory
When a conductor moves in the field, so that it makes an angle 8 with the lines of flux, the force F is given as : F = Bl sin2 0.

No
Yes

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Electromagnetic Field Theory
The static electric field in a conductor is

None of these
Zero
Infinity
Unity

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