Question

What is a radial magnetic field?

Answer 1

Hint: In order to solve this question we need to understand the magnetic field. Magnetic field is the magnetic lines of forces which are produced due to magnetic dipoles. Magnetic field always occurs in a loop so its curl is non zero while the electric field diverges and its curl is zero. Magnetic dipole is a combination of two poles of magnet known as North pole and South pole, So a magnetic field starts from North pole and ends at South pole and then from South pole to North pole and hence creating a loop.

Complete answer:
Radial magnetic field is a type of magnetic field which is radial in nature. It is produced in a moving coil galvanometer.

We can define it by considering a circular loop in between magnetic fields created by pole pieces, so a radial magnetic field generates when the plane of coil is parallel to directions of external magnetic field between pole pieces. This condition could be achieved in a moving coil galvanometer by using pole pieces having concave surfaces inside and by using a soft iron core within the coil.

Note: It should be remembered that a radial magnetic field is a space varying magnetic field that means it is constant in time. Otherwise if the magnetic field is time varying then according to Maxwell electromagnetic equations, it creates a space varying electric field and hence an electromagnetic wave would be produced.