1. | \(M\) | 2. | \(\sqrt{2} M\) |
3. | \(3 M\) | 4. | \(2 M\) |
What is the magnetic dipole moment of the given loop?
1. | \({ 5 \over 2} \pi R^2I\) | 2. | \(3 \pi R^2I\) |
3. | \({ 3 \over 2} \pi R^2I\) | 4. | \(5 \pi R^2I\) |
The magnetic moment of a current (i) carrying circular coil of radius (r) and number of turns (n) varies as :
(1)
(2)
(3) r
(4)
A small coil of N turns has an effective area A and carries a current I. It is suspended in a horizontal magnetic field such that its plane is perpendicular to . The work done in rotating it by about the vertical axis is
(a) (b)
(c) (d)
An electron moves with a constant speed v along a circle of radius r. Its magnetic moment will be (e is the electron's charge)
(1) evr
(2) evr
(3) ev
(4) 2rev