Starting from the position indicated In the drawing, the semicircular plece of w

Question

Starting from the position indicated In the drawing, the semicircular plece of wire rotates through haif a revolution in the direction shown. R (into paper) Which end of the resistor is positive-the left or the right end? O the left end the right end Explain your reasoning. O The Induced magnetic field points in the same direction as the original magnetic field. O Induced current flows clockwise around the loop. O Current flows through a resistor from higher potential toward lower potential O The induced magnetic field opposes the decrease in magnetic flux. Oall of the above

Explanation / Answer

A) When the semi-circular loop is rotated in the direction shown, the magnetic flux through the loop decreases. Therefore the induced magnetic field points into the paper (same direction as the original field). This makes the induced current flow in the clockwise direction.

Hence the right end is positive

B)

All of the above

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