October 2009
Intermediate to advanced
503 pages
14h 28m
English
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Solved Problems
1. The magnetic susceptibility of silicon is −0.4 × 10−5. Calculate the flux density and magnetic moment per unit volume when magnetic field of intensity 5 × 105 A/m is applied.
sol: Given: χ = –0.4 × 10‒5
H = 5 × 105 A /m
B = ? and M = ?
B = μ0(H + M) = μ0 H(1 + χ)
= 4π × 10‒7 × 5 × 105 [1 – 0.4 × 10‒5] = 4π × 5 × 10‒2 × 0.9996 = 0.62 Wb/m2
M = χH = –0.4 × 10–5 × 5 × 105 = –2.0 A/m.
2. The magnetic field strength in silicon is 1000 A/m. If the magnetic susceptibility is −0.25 × 10−5, calculate the magnetization and flux density in silicon.
sol: Magnetic field strength (H) = 1000 A/m
Magnetic susceptibility (χ) = –0.25 × 10‒5
Magnetization (M) = χH = –0.25 × 10‒5 × 1000 = –0.25 × 10‒2 A/m.
Magnetic flux density ( ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.