Electromagnetic Field Theory The hysteresis loop of a magnetic material has an area of 5 cm2 with the scale given as 1 cm = 2 AT and 1 cm = 50 mwb At 50 Hz; the total hysteresis loss is 20 W. 15 W. 50 W. 25 W. 20 W. 15 W. 50 W. 25 W. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory An infinite sheet has a charge density of 150 μ C/m. The flux density in μ C/m 2 is 75. 50. 1/75. 100. 75. 50. 1/75. 100. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory The effective reactance of an inductive coil remains same irrespective of the frequency. increases because of stray capacitance as the frequency increases. decreases because of stray capacitance as the frequency increases. none of these. remains same irrespective of the frequency. increases because of stray capacitance as the frequency increases. decreases because of stray capacitance as the frequency increases. none of these. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory A magnetic vector potential is given by the expression A = (- cos x) (cos y) uz. The flux density at the origin is 0. – uy. 2 ux. – 2 ux. 0. – uy. 2 ux. – 2 ux. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory When the phase velocity of an EM wave depends on frequency in any medium the phenomenon is called Scattering Polarisation Dispersion Absorption Scattering Polarisation Dispersion Absorption ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory A Yagi antenna has a driven antenna Only With one or more directors With a reflector With a reflector and one or more directors Only With one or more directors With a reflector With a reflector and one or more directors ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS