Electromagnetic Field Theory Magnetic circuit with cross sectional area of 20 cm2 is to be operated at 50 Hz from 120 Vrms supply. The number of turns required to active a peak magnetic flux density of 1.8 T in the core flux is 150. 600. 450. 300. 150. 600. 450. 300. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory Which of following can induce the maximum induced voltage ? 1 amp dc. 1 amp 1 Hz. 20 amp dc. 1 amp 100 Hz. 1 amp dc. 1 amp 1 Hz. 20 amp dc. 1 amp 100 Hz. ANSWER DOWNLOAD EXAMIANS APP
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. 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. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory The right hand rule for determining the direction of the induced EMF was introduced by Lenz Maxwell Faraday Fleming Lenz Maxwell Faraday Fleming ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory Which of the following will increase the antenna radiation efficiency? Providing insulation on conductor Top loading of antenna Use of larger section of conductor Any of the above Providing insulation on conductor Top loading of antenna Use of larger section of conductor Any of the above ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory Materials subjected to rapid reversals of magnetism should have high permeability. low permeability. low hysteresis loss. both a and b. high permeability. low permeability. low hysteresis loss. both a and b. ANSWER DOWNLOAD EXAMIANS APP
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