In the figure above, the north pole of the magnet is first moved up away from th
ID: 1635434 • Letter: I
Question
In the figure above, the north pole of the magnet is first moved up away from the loop of wire, then downward towards the loop. As viewed from above, the induced current in the loop is a. Always clockwise with increasing amplitude b. Always clockwise with decreasing amplitude c. Always counterclockwise with increasing magnitude d. First clockwise, then counterclockwise e. First counterclockwise, then clockwise Two long parallel wires are a distance 2a apart as shown above. Point P is in the plane of the wires and a distance a from wire X. When there is a current I in wire X and none in wire Y, the magnitude of the magnetic field at P is Be. When there are equal currents I In both wires and in the same direction, the magnitude of the magnetic field at P is a. B /3 b. 2B /3 c. 10 B /9 d. 4B /3 e. 2B To send a low frequency signal to your bass speakers, you need to filter the signal by adding a(n) with your speakerExplanation / Answer
5) (d) First clockwise, then counter-clockwise.
North pole of the magnet faces the loop. First it is move up away from the loop. According to Lenz's law, the induced current in the loop is such that it opposes the cause producing it. So, the current will try to pull back the magnet towards it. We knoe opposite pole attract each other, so the pole induced in the loop should be south. We also know that clockwise current produces a south pole and counterclockwise current produces a north pole. Hence the direction of current is clockwise.
Then, the magnet is moved down towards the loop. For similar reasons, the loop will try to push it back up. Hence the current is counterclockwise so as to generate north pole.