CIRCUIT DAMAGE DUE
/line of force through P
r metres Length of magnetic
/-"" ^^^ /line of force thr
/ s "V^v - 2 ir r metres
Conductor carrying I
Consider a single conductor carrying a current of
amperes and the
resulting magnetic field as shown in Figure 4.20.
The magnetising force at point P is given by: H
-y- = ^- A
is the length of the magnetic line of force through P.
Since the magnetic flux density B = μ^Η tesla (strictly in vacuum,