What is the direction of magnetic field at the centre of coil carrying current in (i) clockwise, (ii) anticlockwise direction?

How is the magnetic field due to a solenoid carrying current affected if a soft iron bar is introduced inside the solenoid?

Complete the following sentences:

(a) When current flows in a wire, it creates ……………

(b) On reserving the direction of current in a wire, the magnetic field produced by it gets ……………

(c) A current carrying solenoid behaves like a ……………

(d) A current carrying solenoid when freely suspended, it always rest in …………… direction.

State a law, which determines the direction of magnetic field around a current carrying wire.