A long solenoid carrying a current produces a magnetic field `B` along its axis. If the current is doubled and the number of turns per cm is halved, the new vlaue of the magnetic field is

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

A long solenoid carrying a current produces a magnetic field B along its axis. IF the current is doubled and the number of turns per unit length is halved, the new value of he magnetic field is-

A long solenoid carring a current, produces a magnetic field B along its axis. If the current is doubled and the number of turns per cm is doubled. The new value of the magnetic field is

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

A long solenoid carrying a current produces a magnetic field B along its axis. If the number ofturns 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

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