Question

If a magnet is placed in a medium of air
then the ratio of magnetic flux density in
air medium to the magnetic field intensity
is called as​

Answer 1

Answer:

magnetic field

Explanation:

as the field around it helps it stay in air..

Answer 2

Magnetic field intensity will get increased by 4 times.

Explanation:

• The formulae for magnetic field intensity at the centre of circular coil of radius R and carrying current I is $B = \frac{\mu _{0}I}{2\pi R}$

• From the formulae, we can see that magnetic field intensity B at centre of the coil is directly comparable to Current that is passing through it.

• Also, magnetic field intensity will be oppositely proportional to radius of that coil.

• So, if we double the current passing through the coil the magnetic field intensity will be doubled and simultaneously if we halve the radius then it will also increase the intensity by 2 times.

Hence overall the intensity will get increased by 4 times.