Tests 10 pt In the figure below, a long straight wire carries a cur- entot,-5.00

Question

Tests 10 pt In the figure below, a long straight wire carries a cur- entot,-5.00 A. A square loop with a side of length 0.250m is placed a distance 0.100 m away from the wire. The square loop carries a current I,-2.50 A 0.10m CN Find the magnitude of the net force on the square loop. (in N) 6. AO 3.95 × 10-6 BO 4.46 × 10-6 CO 5.04 x 10-6 DO 5.70 × 10-6 EO 6.44 × 10-6 FO 7.28 × 10-6 GO 8.23 × 10-6 HO 9.29 x 10-6 10 1.05 × 10-5 JO 1.19 × 10-5 10 pt A sphere of radius R is placed near a long, straight wire tha arries a steady current I. The magnetic field generated he current is B. The total magnetic flux passing through t phere is

Explanation / Answer

B = mu0 Ia / 2 pi r

B = (4 pi * 10-7 * 5) / ( 2 pi * 0.1) = 1 * 10-5 T

B' = (4 pi * 10-7 * 5) / ( 2 pi * 0.35) = 2.86 * 10-6 T

F = I L B

= (2.5 * 0.25) (1 * 10-5 - 2.86 * 10-6)

F = 4.46 * 10-6 N [option B]

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