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
The developed electromagnetic force and or torque in electromechanical energy conversion system act in a direction that tends

 to decrease the stored energy at constant flux.
 to decrease the stored energy at constant mmf.
 to decrease the co-energy at constant mmf.
 to increase the stored energy at constant flux.

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