Electromagnetic Field Theory
For a linear electromagnetic circuit, which of the following statement is true?

 Field energy is lesser than the co-energy.
 Field energy is greater than the co-energy.
 Field energy is equal to the co-energy.
 Co-energy is zero.

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Electromagnetic Field Theory
Which of the following statement is correct for divergence of electric and magnetic flux densities?

 These are zero for static densities but non zero for time varying densities.
 It is zero for the electric flux density.
 Both are zero.
 It is zero for the magnetic flux density.

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

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Electromagnetic Field Theory
Which statement does not say that electrostatic field is conservative?

 The work done in a closed path inside the fields is zero.
 The potential difference between two points is zero.
 If is gradient of a scalar potential.
 If the curl of E is identically zero.

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