A wire of length L metre carrying a current I ampere is bent in the form of a circle. Its magnitude of magnetic moment will be -
An equilateral triangular loop of side l carries a current I. It is placed in a magnetic field B such that the plane of loop is in the direction of B. The torque on the loop is-
A charged particle (charge q) is moving in a circle of radius R with uniform speed v. The associate magnetic moment µ is given by -
A long solenoid has n turns per metre and current I amp is flowing through it. The magnetic field at the ends of the solenoid is -
In a cyclotron, if a deuteron can gain an energy of 40 MeV, then a proton can gain an energy of -
The magnetic field at the centre of an equilateral triangular loop of side 2L and carrying a current i is -
A magnet is moved towards a coil (i) quickly (ii) slowly; then the induced charge is -
A circular coil of 20 turns and radius 10 cm is placed in uniform magnetic field of 0.10 T normal to the plane of the coil. If the current in coil is 5 A, then the torque acting on the coil will be -
Curie temperature is the temperature above which -