Magnetic Dipole...

The reason for Earth's magnetic field is-

A current loop is similar to a :

Which of the following statements is correct?

1. Magnetic line of forces always start from north pole and end at south pole of the magnet.

2. The magnetic lines of forces never intersect each other

Choose the correct code:

When a bar magnet of magnetic moment \(\vec{M}\) is placed in a magnetic field \(\vec{B}\), then the torque exerted on the magnet will be:

A circular coil of radius 4 cm and of 20 turns carries a current of 3 amperes. It is placed in a magnetic field of intensity of 0.5weber/m². The magnetic dipole moment of the coil is

What is the angle of dip at magnetic poles of earth?

A closely wound solenoid of 2000 turns and the area of cross-section 1.5 × 10^–4 m² carries a current of 2.0 A. It is suspended through its center and perpendicular to its length, allowing it to turn in a horizontal plane in a uniform magnetic field 5 × 10^–2 tesla making an angle of 30º with the axis of the solenoid. The torque on the solenoid will be

Magnetism at the centre of a bar magnet is ______?

An electron moving around the central nucleus has a magnetic moment equal to ___________, where 'l' is the magnitude of the angular momentum of the circulating electron about the central nucleus. ('e' is charge and 'm' is mass of an electron)

The magnetic field strength due to a short bar magnet at a distance r from the mid point of the magnet is B. Find the magnetic field strength at a distance 2r from the mid point of the magnet.