MasteringPhysics: Week9 Magnetism Google Chrome Secure https:// masteringphysics

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MasteringPhysics: Week9 Magnetism Google Chrome Secure https:// masteringphysics rom/myct itemWiew?ottset nexta assignment ProblemlD 73039198 Physics 210 17 tem 8 Item 8 Part A of 19 A. The loop is 14 cLu A single-urri suuare loop ca Find the minimum magnetic neld Br necessary to start tipp ng the loop up trom the table on a side and has a mass of 37x10 2 kg Initially the loop lies flat on Express your answer using two significant figures. is lurred is found that only one side the loop expenences an upward force 03 mT Submit My AnSAers give Up Incorrect: Try Again; 3 attempts remaining previcius l lot 8 relun assignment Provide Feedback Continue

Explanation / Answer

The force is tipping the loop, not raising the whole thing. Thus F = (m/2)*g.

magnetic force F = ILB

I = 19 A, L = 14 cm , m = 3.7*10^-2 kg

mg/2 = ILB

3.7*10^-2*9.8/2 = 19*0.14*B

B = 68 mT

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