Question

on Magnetism Class 12 Question 1. A toroid of n turns, mean radius R and crosssectional radius a carries current I. It is placed on a horizontal table taken as x-y plane. Its magnetic moment m [NCERT Exemplar]
(a) is non-zero and points in the z-direction by symmetry.
(b) points along the axis of the tortoid (m = mΦ).
(c) is zero, otherwise there would be a field falling as \frac{1}{r^{3}} at large distances outside r3 the toroid.
(d) is pointing radially outwards.

Answer 1

Answer:

energy in the form of transverse magnetic and the electric waves in a vacuum these waves travel at the speed of light which is itself a from of electromagnetic . redeation ,: the accelaration of electric charges such as a alternative current in the radio transmitter gives rise to a electromagnetic radiation