When a wire is wound around a soft iron bar, and a current is passed through it, the soft iron bar behaves like a magnet.

A coil of insulated copper wire is wound around a piece of soft iron and current is passed in the coil from a battery. What name is given to the device so obtained ? Give one use of the device mentioned by you.

A coil carrying current behaves like a magnet.

What happens when Propyne is passed through a red hot iron tube?

Soft Iron and Hard Iron

The magnetic field produced around a straight line wire when current flows through it is

An electromagnet with soft iron core is a temporary magnet.

When acetylene is passed through red hot iron tube the product formed is

Fig. shows a coil wound around a soft iron bar XY. Suggest one way of increasing the strength of the electromagnet so formed.

An iron rod of volume 10^(-4)m^(3) and relative permeability 1000 is placed inside a long solenoid wound with 5 "turns"//"cm" . If a current of 0.5 A is passed through the solenoid, then the magnetic moment of the rod is

An iron rod of volume 10^(-4)m^(3) and relative permeability 1000 is placed inside a long solenoid wound with 5 turns"/"cm . If a current of 0.5 A is passed through the solenoid, then the magnetic moment of the rod is