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 Infinity. 2.16. 4.32. Zero. TRUE ANSWER : ? YOUR ANSWER : ?
The main purpose of choke is to pass high frequencies. to block low frequencies. to pass low frequencies. none of above. TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following statement is correct for divergence of electric and magnetic flux densities? Both are zero. These are zero for static densities but non zero for time varying densities. It is zero for the electric flux density. It is zero for the magnetic flux density. TRUE ANSWER : ? YOUR ANSWER : ?
The divergence of a vector is a scalar, while the curl of a vector is another Scalar Vector Unit vector None of these TRUE ANSWER : ? YOUR ANSWER : ?
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 uz N. - 5 × 10-5 uy N. 5 × 10-5 ux N. TRUE ANSWER : ? YOUR ANSWER : ?
The critical frequency of ‘F’ layer is greater than 30 MHz. True False TRUE ANSWER : ? YOUR ANSWER : ?
Find the length of a conductor which is moving with a velocity 0.4m/s in a magnetic field of 8T, inducing an emf of 20V. 0.5m. 6.25m. 5.25m. 0.6m. TRUE ANSWER : ? YOUR ANSWER : ?
Gradient of scalar field is expressed as Outward flux of a vector field per unit volume as the volume about the point tends to zero. Gradient of divergence of a vector field minus the curl of the vector field. Circulation of a vector field per unit area as the area tends to zero. Maximum rate of increase of scalar function at a point. TRUE ANSWER : ? YOUR ANSWER : ?
The useful magnetic flux obtainable from any closed surface is Unity None of these Constant Both A and B TRUE ANSWER : ? YOUR ANSWER : ?
Unit of electric flux density is coulomb / meter2. farad / meter. weber / meter2. coulomb. TRUE ANSWER : ? YOUR ANSWER : ?