Mutual inductance between two magnetically coupled coils depends on all of above. permeability of core. cross sectional area of their common core. the number of their turns. TRUE ANSWER : ? YOUR ANSWER : ?
Cork Screw rule is used to find direction of electric field. direction of emf. direction of current. direction of magnetic field. TRUE ANSWER : ? YOUR ANSWER : ?
What is the value of total electric flux coming out of a closed surface? Zero. Equal to volume change density. Equal to the surface charge density. Equal to total charge enclosed by the surface. TRUE ANSWER : ? YOUR ANSWER : ?
In a lossless medium the intrinsic impedance η = 60π and μr = 1. The relative dielectric constant εr shall be 1. 4. 8. 2. TRUE ANSWER : ? YOUR ANSWER : ?
A plane wave magnetic field is represented by Bx = cos(y – ct). The electric and magnetic fields will be zero in the direction Ex = Ey = 0, By = Bz = 0. Ey = Ez = 0, By = Bz = 0. None of these. Ex = Ey = 0, Bx = By = 0. TRUE ANSWER : ? YOUR ANSWER : ?
A wire 1 m long carries a current of 5A and is at an angle of 30o with B = 1.5 wb/m2. Magnitude of force is 3.75 N. 5 N. 2.5 N. 2 N. TRUE ANSWER : ? YOUR ANSWER : ?
The magnitude of the induced emf in a conductor depends upon on the flux density of the magnetic field. amount of flux cut. amount of flux linkage. rate of change of flux linkage. TRUE ANSWER : ? YOUR ANSWER : ?
Magnetic field intensity at centre of circular coil, of diameter 1 m and carrying a current of 2 A is 1 A/m. 8 A/m. 2 A/m. 4 A/m. TRUE ANSWER : ? YOUR ANSWER : ?
A sphere of 20 cm radius contains electrical charge of density 2/(r sinθ) c/m3. What is the total charge contained within the sphere? 0. None of above. 0.335 C. 0.335/sinθ c. TRUE ANSWER : ? YOUR ANSWER : ?
A voltage waveform V(t) = 12t2 is applied across a 1H inductor for t = 0, with initial current through it being zero. The current through the inductor for t = 0 is given by 4t3. 12t3. 12t. 24t. TRUE ANSWER : ? YOUR ANSWER : ?