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

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

ANSWER DOWNLOAD EXAMIANS APP

Electromagnetic Field Theory
A wire carrying current is bent in the form of a circular loop. Then the magnetic field around each portion of the wire will be

 perpendicular to the circumference of the wire.
 parallel to half portion and perpendicular for the other half.
 none of above.
 parallel to the plane of the wire.

ANSWER DOWNLOAD EXAMIANS APP

Electromagnetic Field Theory
A rectangular waveguide is a

Tube antenna to transmit and receive electromagnetic waves
Hollow rectangular walled room carrying electromagnetic wave
Rectangular conducting wire to propagate electromagnetic waves
Hollow rectangular conducting tube through which electromagnetic waves can be propagat-ed

ANSWER DOWNLOAD EXAMIANS APP