If n is the polarization vector and k is the direction of propagation plane electromagnetic wave, then n = - k. n = K. n × k = 0. n. k = 0. TRUE ANSWER : ? YOUR ANSWER : ?
The electric flux is given D = (2y2 + z) Ix + 4xy Iy + x Iz C/m2. The volume charge density at point (-1, 0, 3) is - 8 C/m3. 0 C/m3. - 4 C/m3. - 2 C/m3. TRUE ANSWER : ? YOUR ANSWER : ?
Magnetic flux density emerging out of a closed surface is zero. depends on magnetic movements inside the closed surface. infinite. depends on magnetic movements outside the closed surface TRUE ANSWER : ? YOUR ANSWER : ?
In free space E (z, t) = 103 sin(ωt - βz) uy v/m. What is the value of H (z, t) None of above. (103/377) sin(ωt - β z)(ux) A/m. (103/377) cos(ωt - β z)(-ux) A/m. (103/377) sin(ωt - β z)(-ux) A/m. TRUE ANSWER : ? YOUR ANSWER : ?
If in a 1 mF capacitor, an instantaneous displacement current of 1 A is to be established in the spaces between its plates then it is possible by applying 106 volts/sec. 106 Amp/sec. 106 Amp. 106 volts. TRUE ANSWER : ? YOUR ANSWER : ?
A loop antenna is a commonly used for Satellite communication All of these Direction finding Radar TRUE ANSWER : ? YOUR ANSWER : ?
In above problem the induced emf will be reduced to half if the conductor moves an angle of 60° to the direction of field. 30° to the direction of field. 75° to the direction of field. 45° to the direction of field. TRUE ANSWER : ? YOUR ANSWER : ?
Whenever the magnetic flux changes with respect to an electric conductor or a coil, an EMF is induced in the conductor is Faraday’s fourth law third law second law first law TRUE ANSWER : ? YOUR ANSWER : ?
In a lossless medium the intrinsic impedance η = 60π and μr = 1. The relative dielectric constant εr shall be 1. 8. 2. 4. TRUE ANSWER : ? YOUR ANSWER : ?
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. 450. 150. 600. TRUE ANSWER : ? YOUR ANSWER : ?