Divu paralēlu strāvu nesošu vadu radītais magnētiskais lauks – problēmas un risinājumi

1. Divi gari paralēli vadi, pa kuriem plūst vienāda strāva, 3.-A. Ja attālums attālums starp abiem vadiem ir 40 cm, nosakiet magnētiskais lauks punktā P. μ_o = 4π x 10^-7 Wb A^-1 m^-1.

Zināms:

Elektriskā strāva (I) = 3-A

Attālums starp 1. un 2. vadu (r₁₂) = 40 cm = 0.4 m

Attālums starp 1. vadu un P (r_1P) = 30 cm = 0.3 m

Attālums starp 2. vadu un P (r_2P) = 40 – 30 = 10 cm = 0.1 m

µ_o = 4π x 10^-7 Wb.A^-1.m^-1

Meklē: Magnetic field at point P

šķīdums:

Magnetic field produced by wire 1 (left) :

Magnetic field produced by wire 2 (right) :

Magnetic field at point P :

B_P = B₂ - B₁ = 6 x 10^-6 - 2 x 10^-6

B_P = 4 x 10^-6 Tesla

2. A long wire carrying current 2-A. Determine magnitude and direction of magnetic field at point P. (μ_o = 4π x 10^-7 Wb A^-1 m^-1)

Zināms:

Elektriskā strāva (I) = 2 A

Distance between wire and point P (r_P) = 4 cm = 0.04 m

μ_o = 4π x 10^-7 Wb. A^-1 m^-1

Meklē: Magnitude and direction of magnetic induction at point P

šķīdums: