Only solve f and h Class Management Help Magnetism and Magnetic Fields Begin Dat
ID: 1732103 • Letter: O
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Only solve f and h
Class Management Help Magnetism and Magnetic Fields Begin Date: 7/25/2018 12:01:00 AM -Due Date: 8/2/2018 11:59:00 PM End Date: 8/8/2018 11:59:00 PM (5 %) Problem 8: An electric current is flowing through a long cylindrical conductor with radius a 0.65 m. The current density9.5 A/m2 is uniform in the cylinder. In this problem we consider an imaginary cylinder with radius r around the axis AB. IA Otheexpertta.com 13% Part (a) When r is less than a, express the current inside the imaginary cylinder , in terms of r and . 13% Part (b) Express the magnitude of the magnetic field B at r in terms of the current through the imaginary cylinder , and its radius r 13% Part (c) ]ixpress Bin tains an's and r 13% Part (d) For r-0.5 a, calculate the numerical value of B in Tesla. 13% Part (e) When r is greater than a, express the current inside the imaginary cylinder in terms of r, a and J. i3% Part (f) Express the magnitude of the magnetic field, B, at r > a in terms of l and r. 13% Part (g) Express B in terms of, a and r. 13% Part (h) For r-2 a, calculate the numerical value ofBin Tesla. ? Grade Summary Deductions Potential B(r 2a) 0.00000776 0% 100% in cos0 tan0789 cotan0asin) acosO atan0 acotanO sinh0 cosh0 tanh0 cotanhO+ Submissions Attempts remaining: 19 (090 per attempt) detailed view /23.* 0% 0 END O Degrees Radians VO BACKSPCEEL CLEAR Submit Hint FeedbackI give up! Feedback: for a deduction Check your algebra: the factor of 4 should cancel in the denominator and Hints: 0% deduction per hint. Hints remaining: numeratorExplanation / Answer
f] By using Ampere's law, B = u0 * Ienclosed /2pi r
= u0*I /(2pi r)
h] Again, putting values in above formula,
B = u0*I /(2pi r)
= u0*J*pi a^2 /(2pi *2a)
= 2e-7*9.5*pi*0.65/2
= 0.00000194 T
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