A circular loop has its radius increasing at a rate of 2 m/s. The loop placed perpendicular to a constant magnetic field of 0.5 wb/m2. When the radius of the loop is 4 m. the emf induced in the will be Zero. 8 π V. 0.8 π V. 0.4 π V. TRUE ANSWER : ? YOUR ANSWER : ?
A potential field is given by V = 3x2 y – yz. The electric field at P(2, -1, 4) is 12 Ix + 8 Iy + Iz V/m. 12 Ix - 8 Iy - Iz V/m. 12 Ix - Iz V/m. 12 Ix - 8 Iy V/m. TRUE ANSWER : ? YOUR ANSWER : ?
Electric flux in coulombs emanating from any surface of a cube containing C coulombs of charge at its centre is Q / 6. Q / 4π. 4πQ / 6ε. Q / 6ε. TRUE ANSWER : ? YOUR ANSWER : ?
If n is the polarization vector and k is the direction of propagation plane electromagnetic wave, then n. k = 0. n = - k. n × k = 0. n = K. TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following statement is correct for divergence of electric and magnetic flux densities? It is zero for the magnetic flux density. These are zero for static densities but non zero for time varying densities. It is zero for the electric flux density. Both are zero. TRUE ANSWER : ? YOUR ANSWER : ?
The work done by a force F = 4un - 3uy + 2uz N in giving a 1nC charge a displacement of (10 ux + 2uy - 7uz) m is 40 nj. 60 nj. 100 nj. 20 nj. TRUE ANSWER : ? YOUR ANSWER : ?
Two infinite parallel metal plates are charged with equal surface charge density of the same polarity. The electric field in the gap between the plates is dependent on coordinates of field points. same as that produced by one plate. double the field produced by one plate. zero. TRUE ANSWER : ? YOUR ANSWER : ?
The property of the coil by which a counter emf is induced in it when the current through the coil changes is known as series aiding inductance. self inductance. capacitance. mutual inductance. TRUE ANSWER : ? YOUR ANSWER : ?
An open wire transmission line having a characteristic impedance of 600 ohms is terminated by a resistive load of 900 O. The standing wave ratio will be 4.5 2.5 1.5 3.5 TRUE ANSWER : ? YOUR ANSWER : ?
The magnitude of the induced emf in a conductor depends upon on the amount of flux linkage. amount of flux cut. rate of change of flux linkage. flux density of the magnetic field. TRUE ANSWER : ? YOUR ANSWER : ?