SI unit of flux density is____________________? A. NA-1m-1 B. NAm-1 C. NmA-1 D. NmA-2

The relationship between Tesla and smaller unit Gauss of magnetic induction is given by_________________? A. 1T = 103 G B. 1T = 10-4 G C. 1T = 10-2 GD. 1T = 104 G

Which one of the following material is most suitable for making core of an electromagnet ? A. air B. steel C. Cu-Ni alloyD. soft iron

A magnetic field___________________? A. always exerts a force on a charged particle B. never exerts a force on a charged particles C. exerts a force if the charged particle is moving in the direction of the magnetic field linesD. exerts…

Two parallel wires carrying currents in the opposite directions____________________? A. repel each other B. attract each other C. have no effect upon each other D. they cancel out their individual magnetic fields

What is the value of the current in a wire of 10cm long at the right angle to a uniform magnetic field of 0.5 Weber/m2 when the force acting on the wire is 5N ? A. 1A B. 10AC. 100A…

Magnetic force acting on a unit positive charge moving perpendicular to the magnetic field with a unit velocity is called____________________? A. magnetic flux B. magnetic field intensityC. magnetic induction D. self inductance