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 300. 150. 450. 600. 300. 150. 450. 600. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory Materials subjected to rapid reversals of magnetism should have low permeability. high permeability. both a and b. low hysteresis loss. low permeability. high permeability. both a and b. low hysteresis loss. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory Gradient of scalar field is expressed as Gradient of divergence of a vector field minus the curl of the vector field. Circulation of a vector field per unit area as the area tends to zero. Maximum rate of increase of scalar function at a point. Outward flux of a vector field per unit volume as the volume about the point tends to zero. Gradient of divergence of a vector field minus the curl of the vector field. Circulation of a vector field per unit area as the area tends to zero. Maximum rate of increase of scalar function at a point. Outward flux of a vector field per unit volume as the volume about the point tends to zero. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory Skin depth is proportional to Frequency. 1/√σ. Permeability. √(σ). Frequency. 1/√σ. Permeability. √(σ). ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory The attenuation in waveguide above to cut off frequency Very low Zero Very high Infinite Very low Zero Very high Infinite ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory 1 Tesla = 1 wb/m. 1 wb/ m2. 1 wb- m2. 1 wb . 1 wb/m. 1 wb/ m2. 1 wb- m2. 1 wb . ANSWER DOWNLOAD EXAMIANS APP
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