
The magnetic dipole moment of a current loop is independent of

Important Questions on Magnetic Effect of Current





The ratio of the magnetic field at the centre of a current-carrying circular coil to magnetic moment is . If the current and the radius both are doubled. The new ratio will become


A uniform conducting wire of length and resistance is wound up as a current-carrying coil in the shape of,
(i) an equilateral triangle of side .
(ii) a square of side .
The magnetic dipole moments of the coil in each case respectively are:







A particle of mass and charge is moving in a circle of radius with speed , where speed of light. The ratio of the magnetic moment of the particle to its angular momentum is



A wire carrying current is bent in the shape as shown, where rectangle and are perpendicular to each other. If the sides of the rectangles are of lengths and , then the magnitude and direction of magnetic moment of the loop is :



