Question

The magnetic induction field due to a magnetic north pole of strength 10am and 5cm away from the pole in weber/m^2

Answer 1

Answer:

4 x 10–4 Wb / m2.

Explanation:

Magnitude of magnetic induction due to a pole of strength m at a distance r from it is

B = μ0/ 4π(m / r2) ,    μ0 / 4π = 10–7 H.

m = 10 Am,  r = 5 cm = 5 x 10–2 m

So, magnitude of magnetic induction, B = (10–7)(10 / 25 x 10–4)

=4 x 10–4 Wb / m2.