Electricity And Magnetism - Study Mode
[#316] Consider the following statements. 1. Magnetic lines of force are closed curves while electric lines are not. 2. Electric lines of force are closed curves while magnetic lines are not. 3. Both electric and magnetic lines of force are closed curves. Which of statement(s) given above is/are correct?
Correct Answer
(C) Only 1
[#317] A choke coil has
Correct Answer
(C) high inductance and low resistance
[#318] While moving from one end to another end inside a solenoid, its magnetic field . . . . . . . .
Correct Answer
(C) remains same
[#319] If the resistance of the conductor is doubled then the electric current is halved. What causes this:
Correct Answer
(B) $$I = frac{V}{R}$$
[#320] What is the direction of magnetic field lines in a magnet?
Correct Answer
(C) North pole to South pole