chemical, potential energy is stored in a battery.
the negative end of a battery is connected to a wire.
the wire loops numerous times around a piece of steel.
the wire returns to the positive end of the battery.

what happens to the piece of steel?
a) it begins to spin.
b) it gains a negative charge.
c) it gains a positive charge.
d) it moves toward a piece of iron.

The table below shows the acceleration of gravity on different bodies in the solar system. on which body would a 10 kg lamp has the most gravitational potential energy when lifted to a height of 2 m? a. earth b. mars c. neptune d. uranus

How can you increase the strength of an electromagnet?

Cells in the nervous system have a potential difference of 70 mv across the cell membrane separating the interior of the cell from the extracellular fluid. this potential difference is maintained by ion pumps that move charged ions across the membrane. is this an emf? select the correct answer and explanation. 1)no. the ion pumps cannot separate charges; thus, they cannot create a potential difference. 2)yes. the ion pumps cannot separate charges, but they still can create a potential difference. 3)yes. the ion pumps can actively separate charge; thus, they can create a potential difference. 4)no. the ion pumps can separate charges, but they cannot create a potential difference.