Magnetic Effect...

Give names of two materials with which permanent magnets are made.

When a coil carries current in an anti clockwise direction what pole does it create?

Why does short circuit lead to the fuse wire burning?
Which of the following is correct reason?
(A) When live wire comes in contact with the neutral line.
(B) When current in the circuit abruptly increases.

A compass needle is kept far below, and parallel to a long straight current carrying wire. What is likely to happen to the compass needle?

Statement A : A commutator is sometimes called split rings.
Statement B : The induced current produced in conductor is direct in nature.

An electric generator is a device which converts

Which rule determines the direction of flow of current in the conductor?

Statement A : The magnetic field produces by a current in a straight wire has no poles.
Statement B : Like poles of magnets repel each other.

In the statement of Fleming’s left hand rule. What does the fore finger represent?

A closed loop with a battery and a key is kept close to a loop with a galvanometer. What is the change noticed in the coil?