Question

The figure shows a cross section across a long cylindrical conductor of radius a = 1.99 cm carrying uniform current 24.7 A. What is the magnitude of the current's magnetic field at radial distance (a) 0, (b) 1.43 cm, (c) 1.99 cm (wire's surface), (d)3.13 cm?

Answer 1

Solution;

a= 1.99 cm = 0.0199 m

I= 24.7 A

A)

When r= 0

Then the magnitude B is

B=0 T

B) when r= 1.43 cm

Then the magnitude B is

C) when r=1.99 cm on surface then the magnitude B is

d)

When r= 3.13 cm

Then the magnitude of B is