(20%) Problem 4: An infinitely long wire carries a current of 1-155 A Randomized

Question

(20%) Problem 4: An infinitely long wire carries a current of 1-155 A Randomized Variables I = 155 A Otheexpertta.com 50% Part (a) Consider a circle with a radius r and centered on the wire. Determine the magnitude of the magnetic field B at points along the circle in terms of I andr Grade Summary Deductions Potential 0% 100% Submissions Attempts remaining (3% per attempt) detailed view 10 0 END Submit Hint Hints: 1 % deduction per hint. Hints remaining: 2 Feedback: 0% deduction per feedback 50% Part (b) If r = 0.085 m, calculate the numerical value of B in tesla

Explanation / Answer

Here ,

for the magnitude of magnetic field

part A) using Amphere circuital law

2pi * r * B= 0 * I

B = 0 * I/(2pi * r)

part B)

at r = 0.085 m

magnetic field = 4pi *10^-7 * 155/(2pi * 0.085)

magnetic field = 3.64 *10-5 T

the magnetic field is 3.64 *10-5 T

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