Can anyone please answer the following questions I need all

Solution

(1). Electric field strength (E):

The force act on a unit positive charged particle placed on an electric field is known as electric field strength .

i.e., E = F/q

Where F = force

          q = charge

(2).Dipole magnet means a closed loop of electric current or a pair of poles as the dimensions of the source reduced to zerowhile keeping the magnetic moment constant

Magnetic moment M = pole strength x separation of the two poles

(3).The number of lines of forces crossing unit area in a nonmal direction is proportional to the electric intensity.

thats the reason.