You can use measurements of the magnetic field of a coil to determine how much c

Question

You can use measurements of the magnetic field of a coil to determine how much current your battery is supplying to the coil. Using your value of B (Experiment EXP5), determine the conventional current I through your coil. If this current is less than 3 A, you should replace the battery. (Take the magnetic field along the axis of the coil as coil, r is the distance along the axis from the center of the coil, and N is the number of coils. Remember that you must always position the compass in such a way that the coil's magnetic field is 2T_ 4 (r2 + R2)3/ the coil as 82R2IN where R is the radius of the circular perpendicular to the Earth's magnetic field, BE and assume the compass deflection from North is 0. Use the following as necessary: 0, BE, r, R, N and 0.) Additional Materials Section 17.8

Explanation / Answer

let theta is the angle of deflection in the compass.

then, B_coil = BE*tan(theta)

mue*N*I*R^2/(2*(r^2 + R^2)^3/2) = BE*tan(theta)

I = BE*tan(theta)*2*(r^2 + R^2)^(3/2)/(mue*N*R^2) <<<<<<-----Answer

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