Timer Circuit. Julie, a physics major, is measuring the magnetic field along the

Question

Timer Circuit. Julie, a physics major, is measuring the magnetic field along the axis of a current carrying loop. The radius of the loop is 1.0 cm. She makes the measurements shown in the first and last columns of this table. 0.10 4.9 E-5 1.5 E-5 0.15 0.20 0.62 E-5 0.32 E-5 0.25 1. Complete the second column in this table. 2. Plot this B vs z 3 on the following graph 6.E-05 3. Draw straight line 5.E-05 a though the data points. 4.E-05 3 E-05 2.E-05 1.E-05 0E+0 200 400 600 800 1000 4. Calculate the slope of this line. Use proper units. 5. Calculate the magnetic moment, Aum of the loop Use proper units. 51

Explanation / Answer

5)

magnetic moment

M = i A

i is current in the loop

A area of the loop

so

M = i x pix 0.01 x0.01

M = i x pi x 10^-4

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