Question

What will be the magnetic potential difference across the air gap of 1cm length in magnetic field of 100 at/m ?

Answer 1

Magnetic potential difference across air gap is 1 AT.

Explanation:

Given data:

Length of air gap = 1 cm

Magnetic field = 100 AT/M.

H= 100 AT

L= 1 cm  = 1/100 m

Formula to calculate magnetic field strength:

H = m.m.f./L  -------------- (1)

Here H = magnetic field strength measured in Amperes per metre .

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

Magnetic potential difference across air gap is 1 AT.

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