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 The frequency of the power wave associated with an electromagnetic wave having field as E = e-z/δ cos(ω - zδ) is given by ω / π. ω/2π. ω. ω/4π. ω / π. ω/2π. ω. ω/4π. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory For an inductor, current is proportional to magnetic field. none of them. voltage across the inductor. both (A) and (B). magnetic field. none of them. voltage across the inductor. both (A) and (B). ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory The operation of electric generators and motors depend on the intraction between magnetic field and Electric current. Electric fields. Commutator. Copper conductors. Electric current. Electric fields. Commutator. Copper conductors. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory For DC voltage an inductor is virtually a open circuit. short circuit. depends on magnitude of voltage. depends on polarity. open circuit. short circuit. depends on magnitude of voltage. depends on polarity. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory A rectangular loop in the x – z plane bounded by the lines x = 0, x = a, z = 0 and z = b is in a time varying magnetic field is given by B = B0 cosωt + ay. Where B0 is constant, ω is angular frequency and ay unit vector in the y direction. Now the emf induced in the loop is given by Bo ω sinω t. abω Bo sinω t. Zero. ab Bo cosω t. Bo ω sinω t. abω Bo sinω t. Zero. ab Bo cosω t. ANSWER DOWNLOAD EXAMIANS APP
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