Yes, but only if the coil doesn't have an iron core.

No, because only permanent magnets are suitable to be used as a compass.

Yes, but only if the coil can turn easily.

It will reach a height equal to its initial height.

It will get higher than the initial height.

It will not get as high as the initial height.

After sunrise, because temperature rises fast during that part of the day.

Before sunrise, because it's uniformly cold during that part of the day.

After sunset, because temperature falls fast during that part of the day.

The change in internal energy is the same in the two processes.

The temperature change is the same in the two processes.

The heat transfer is the same in the two processes.

If one stands on it on one foot.

If one places both feet on it.

It shows the same value in either case.

Object 1 has a constant acceleration.

Object 2 moves uniformly.

Object 3 has a non-zero acceleration.

It should be changed to half its original value.

It should be changed to  times its original value.

It should be changed to one fourth of its original value.

Yes, due to electrostatic induction.

Yes, because negative charges are transferred from the electroscope to the rod.

No, because no charges are transferred to the electroscope.

Figure A.

Figure B.

Figure C.

Figure D.

2. or 4.