Chapter 13 : Magnetism

Example No. 13_1 Page No. 291

# Make the following conversions: (a) 25,000 Mx to Wb# (b) 0.005 Wb to Mx.

# Given data

A = 25000.0#          # A=25000 Maxwell
B = 0.005#          # B=0.005 Wabers
C = 1*10**8#         # Conversion Factor

Wb = A*(1.0/C)#
print 'The 25000 Maxwell = %0.2e Wabers'%Wb
print 'i.e 250*10**-6 Wb or 250 uWb'

Mx = B*C#
print 'The 0.005 Wabers = %0.2f Maxwell'%Mx
print 'i.e 5.0*10**5 Mx'

The 25000 Maxwell = 2.50e-04 Wabers
i.e 250*10**-6 Wb or 250 uWb
The 0.005 Wabers = 500000.00 Maxwell
i.e 5.0*10**5 Mx

Example No. 13_2 Page No. 392

# With a flux of 10,000 Mx through a perpendicular area of 5 sqcm, what is the flux density in gauss?

# Given data

A = 5.#      # Area=5 sqcm
flux = 10000.0# # Total Flux=10000 Mx

B = flux/A#
print 'The Flux Density = %0.2f Guass (G)'%B

The Flux Density = 2000.00 Guass (G)

Example No. 13_3 Page No. 394

# With a flux of 400 uWb through an area of 0.0005 sqm, what is the flux density B in tesla units?

# Given data

A = 0.0005#          # Area=0.0005 sqm
flux = 400*10**-6#    # Total Flux=400 uWb

B = flux/A#
print 'The Flux Density = %0.2f Tesla (T)'%B

The Flux Density = 0.80 Tesla (T)

Example No. 13_4 Page No. 394

# Make the following conversions: (a) 0.003 T to G# (b) 15,000 G to T.

# Given data

A = 0.003#          # A=0.003 Tesla
B = 15000.#          # B=15000 Guass
C = 1.*10**4#         # Conversion Factor

G = A*C#
print 'The 0.003 Tesla = %0.2f Guass'%G

T = B*(1/C)#
print 'The 15,000 Guass = %0.2f Tesla'%T

The 0.003 Tesla = 30.00 Guass
The 15,000 Guass = 1.50 Tesla