Physics for Sciences 2 Hw4 Problem 17.10 Problem 17.10 A metal rod is connected

Question

Physics for Sciences 2 Hw4 Problem 17.10 Problem 17.10 A metal rod is connected to a battery through two stiff metal wires that hold the rod horizontally. The rod is between the poles of a horseshoe magnet that is sitting on a mass-measuring platform scale, which reads 100 g. After you turned on the current in the circuit, the scale supporting the magnet read 106 g. The rod is 7.3 cm long and the current through it is 1.4 A. Part A Find the magnitude of the magnetic field. Express your answer to two significant figures and B Value T Submit My Answers Give Up Incorrect; Try Again; 2 attempts remaining

Explanation / Answer

applygravitational force = magnetic force

mg = iLB

where m is mass

g is accleration due to gravity

i is current

L is length

and B is magnetic field

so
so magnetic field B = mg/iL

B = 0.106 * 9.8/(1.4 *0.073)

B = 10.16 tesla

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