A 150-turn circular coil of wire has a radius of 10.0 cm and a total resistance of 0.105Ω . At its center the?
A 150-turn circular coil of wire has a radius of 10.0 cm and a total resistance of 0.105Ω . At its center the magnetic field strength is 7.45mT .
1. Determine the voltage of the power supply creating the current in the coil.
2. What would be the field strength at a point 4.1cm directly above or below the center of the coil?
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show your working please I'll check it.
Field at center of current loop is B = μo N I / (2 r) where μo - magnetic permeability; μo= 4π x 10^-7 Tm/A N - number of turns; N=10 I - current; I = V/R = 12 / 0.5 = 24A r - radius of a loop; r=0.125m B = 4π * 10^-7 * 10 * 24 / (2 * 0.125) B = 0.0012 T = 1.2mT