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

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

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Electromagnetic Field Theory
Which of following is true for a purely inductive circuit ?

 Actual power of the circuit is zero.
 Apparent power of the circuit is zero.
 Reactive power of the circuit is zero.
 Any capacitance even if present in the circuit will not be charged.

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