A.) What is the magnitude of the torqu exerted on the loop? B.) Assume that ? is

Question

A.) What is the magnitude of the torqu exerted on the loop?

B.) Assume that? is measure in the positive direction; i.e., clockwise (looking down from above) as shown in the figure. if the loop is at rest, the magnetic torque will:

1. not affect?

2. try to make? smaller.

3. try to lower the loop along the y-axis.

4. try to make? larger.

5. try to lift the loop along the y-axis.

6. None of these.

C.) if the axis of rotation is parallel to y-axis but at the center of the coil (with booth sides l of the coil contributin), the torque:

1. none of these.

2. is smaller than when the axis of rotation is on the edge of the coil.

3. is not affected.

4. cannot be determined since the direction of the torque is changed.

5. is larger than when the axis of rotation is on the edge of the coil.

Explanation / Answer

A) mag of torque = number of turns * current * area * B field * cos@ =

= 338 * 9.2 * 0.63 * 0.59 * 0.28 * cos36 =

= 261.8 N-m

B) option 4, will try to make the angle larger

C) option 3, is not affected (the calculation from part A would still be the same)

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