Electromagnetic Field Theory When the phase velocity of an EM wave depends on frequency in any medium the phenomenon is called Polarisation Scattering Absorption Dispersion Polarisation Scattering Absorption Dispersion ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory Which of the following statement regarding waveguides is incorrect? Waveguides can handle large power at UHF and microwaves At frequencies below the cut off value the wave progresses across the waveguide after total reflections Waveguides are usually air filled hollow conducting metallic tubes for transmitting UHF and microwaves At waveguide can be coupled to a coaxial cable Waveguides can handle large power at UHF and microwaves At frequencies below the cut off value the wave progresses across the waveguide after total reflections Waveguides are usually air filled hollow conducting metallic tubes for transmitting UHF and microwaves At waveguide can be coupled to a coaxial cable ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory Poyniting vector has the dimensions Watt × metre2. Watts/metre2. Watt/metre. Watt × metre. Watt × metre2. Watts/metre2. Watt/metre. Watt × metre. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory As a result of reflection from a plane conducting wall, electromagnetic waves acquire an apparent velocity greater than the velocity of light in space. This is called the velocity of propagation. normal velocity. group velocity. phase velocity. velocity of propagation. normal velocity. group velocity. phase velocity. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory A magnetic material has a total flux B of 80 micro Wb with an mmf of 160 AT. The reluctance in ampere turn per weber is 2 × 10-8. 2 × 10-6. 2 × 106. 2 × 108. 2 × 10-8. 2 × 10-6. 2 × 106. 2 × 108. ANSWER DOWNLOAD EXAMIANS APP
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 50 W. 20 W. 15 W. 25 W. 50 W. 20 W. 15 W. 25 W. ANSWER DOWNLOAD EXAMIANS APP
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