What is the solenoid? Give magnitude of magnetic of magnetic field is applied on it?

What is magnetic field intensity?

What is radial magnetic field ?

A long solenoid carrying a current produces a magnetic field B along its axis. If the number of turns per cm is doubled and the current in the solenoid is halved, then the new value of the magnetic field along its axis will be

On what factors does the magnitude of magnitude of magnetic field at the centre of a current carrying circular wire depends.