GATE 2022 : Electromagnetic Theory Quiz 4

Which of the following represent the correct expression of magnetic energy density?

The tangential component of magnetic field intensity at the interface between two surface is

A magnetic field  exist at a point. If a test charge moving  experience no force at a certain point, the electric field at that point will be

The energy stored in a solenoid is 25 J. It is 20 cm long and has a diameter of 3 cm and wound with 1500 turns of wire. Determine the approximate current carried by the solenoid. (Consider π² ≈ 10)

A coil is linked with a varying magnetic flux  If at time t = 5 sec the emf induced is 10 V. then the value of a is

Two infinitely long wires at x = 0 and x = 2 carries steady current of 10A flowing in +y direction. The magnetic field density  at (4, 0, 0) is