Chapter10 - Magnetic Measurements

Exa 10.1 page 229

In [1]:
from __future__ import division
from math import pi
K=0.1*10**-3 
d=60 
N2=200 
phi2=K*d/(2*N2) 
a2=25*10**-6 
B=phi2/a2 
N=300 
I=10 
l=0.1 
H=N*I/l 
Permability_absolute=4*pi*10**-7 
Permability_relative=B/(Permability_absolute*H)
print "Relative permability of iron = %.2f"%(Permability_relative)

Relative permability of iron = 15.92

Exa 10.2 page 229

In [2]:
N1=2500 
I1=2 
l1=1 
a2=3*10**-4 
Permability_absolute=4*pi*10**-7 
phi2=Permability_absolute*N1*I1*a2/(l1) 
N2=50 
theta=1 
l=10 
K=2*N2*phi2/(theta*l) 
a=60*pi*10**-7 
print "Galvanometer Constant=%.6f Wb turns/division"%(K)

Galvanometer Constant=0.000019 Wb turns/division