Question

You are designing a new solenoid and experimenting with material for each turn. The particular turn you are working with is a circular loop of radius 4.50 cm that carries a current of 15.0 A. Calculate the magnetic field B at the center of the loop. Consider the coordinate system in the figure. If the circular loop lies in the xy plane and if the current flows clockwise around the loop, which direction does the magnetic field point inside the loop? If we decrease the radius the magnetic field will:
You are designing a new solenoid and experimenting with material for each turn. The particular turn you are working with is a circular loop of radius 4.50 cm that carries a current of 15.0 A. Calculate the magnetic field B at the center of the loop. Number Consider the coordinate system in the figure. If the circular loop lies in the xy plane and if the current flows clockwise around the loop, which direction does the magnetic field point inside the loop? O positive z O positive x O negative z O negative y (Scroll down for more questions.) If we decrease the radius the magnetic field will:

Answer 1

field at the center

B = (uo/ 4 pi) 2 pi * i / r

B = 10^-7 2* 3.14* 15 / (4.5*10^-2)

B = 2.093*10^-4 T

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field directed along - z axis

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since field is inversely proportional to radius, so on decreasing radius field increases.

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Comment in case any doubt, will reply for sure.. Goodluck