Magnetic Effects Of Current Mock Tests

A circular loop of radius R carrying current I is placed in a uniform magnetic field B perpendicular to its plane. The tension in the loop is:

In a domestic electric circuit, the fuse wire is connected in:

A current loop behaves as a magnetic dipole. The magnetic potential energy is minimum when the angle between the magnetic moment and external field is:

A proton and an alpha particle enter a magnetic field perpendicularly with same speed. The ratio of radii of their paths (r_p : r_alpha) is:

An electric motor converts:

A charged particle enters a uniform magnetic field perpendicular to its velocity. The path traced is:

An electron and a proton enter a uniform magnetic field perpendicularly with the same kinetic energy. The ratio of the radii of their paths is: (m_p/m_e = 1840)

When a bar magnet is broken into two equal halves, what happens to the pole strength and magnetic moment of each piece?