Electromagnetic Field Theory If n is the polarization vector and k is the direction of propagation plane electromagnetic wave, then n. k = 0. n × k = 0. n = K. n = - k. n. k = 0. n × k = 0. n = K. n = - k. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory Which of the following impedance inversion is obtained? Balun transformer Short-circuited stub A half wave line A quarter wave line Balun transformer Short-circuited stub A half wave line A quarter wave line 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. group velocity. phase velocity. normal velocity. velocity of propagation. group velocity. phase velocity. normal velocity. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory A magnetic field B = 5 × 10-2 uz T exerts a force on 0.02 m conductor along the x-axis. The conductor carried a current of 5 mA in the – ux direction. What force must be applied to the conductor to hold it in position - 5 × 10-5 uy N. 5 × 10-5 uy N. 5 × 10-5 ux N. 5 × 10-5 uz N. - 5 × 10-5 uy N. 5 × 10-5 uy N. 5 × 10-5 ux N. 5 × 10-5 uz N. 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 abω Bo sinω t. Bo ω sinω t. Zero. ab Bo cosω t. abω Bo sinω t. Bo ω sinω t. Zero. ab Bo cosω t. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic Field Theory In a dielectric material an applied field in x direction Ex = 5 v/m gives a polarization of px = 3/10π ux nc/m2. The susceptibility of the material is 2.16. 4.32. Zero. Infinity. 2.16. 4.32. Zero. Infinity. ANSWER DOWNLOAD EXAMIANS APP
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