Question

What is the magnetic potential difference across an air: gap of 1 cm length having magnetic field strength 100 AT/M?

Answer 1

The magnetic potential difference across the air gap is 1 AT

Explanation:

Given that,

The air gap of 1 cm length with magnetic field 100 AT/M.

Thus, H= 100 AT

L= 1 cm  = 1/100 m

We know  formula to calculate magnetic field strength:

 H = m.m.f./L  -------------- (1)

where

H = magnetic field strength measured in Amperes per metre $(Am^{-1})$.

m.m.f = magneto motive force measured in Ampere turns (At).

L = average length of magnetic circuit measured in metres (m).

Other formula to calculate magnetic field strength:

H = NI/L ----------------(2)

where

N = number of turns and

I = current in amperes.

Equating (1) and (2)

m.m.f. or NI = H X L

=  100× (1/100 )

= 1 AT

Hence, the magnetic potential difference across the air gap is 1 AT

Answer 2

Answer:

Explanation:What is the magnetic potential difference across an air: gap of 1 cm length having

magnetic field strength 100 AT/m?