The figure below shows a long straight wire just touching a circular loop carrying a current I, = 2.72 A in the clockwise direction. Both in the same plane. (a) What direction must the current I, in the straight wire have in order to create a magnetic field at the center of the loop in the direction opposite to that created by the loop? O from right to left O from left to right (b) What current must the long straight wire carry in order to have zero net magnetic field strength at the center of the loop?

Question
The figure below shows a long straight wire just touching a circular loop carrying a current I, = 2.72 A in the clockwise direction. Both
in the same plane.
(a) What direction must the current I, in the straight wire have in order to create a magnetic field at the center of the loop in the direction opposite to that created by the loop?
O from right to left
O from left to right
(b) What current must the long straight wire carry in order to have zero net magnetic field strength at the center of the loop?
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Transcribed Image Text

The figure below shows a long straight wire just touching a circular loop carrying a current I, = 2.72 A in the clockwise direction. Both in the same plane. (a) What direction must the current I, in the straight wire have in order to create a magnetic field at the center of the loop in the direction opposite to that created by the loop? O from right to left O from left to right (b) What current must the long straight wire carry in order to have zero net magnetic field strength at the center of the loop?

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Magnetic Effects of Current

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