Physics

4. The electric potential difference between two points.
5. A device to transform energy from one electrical circuit to another by means of mutual inductance between two coils.
6. Property of space around a charged object that causes forces on other charged objects.
8. The rate at which a charge flows through a surface.
9. The ratio of potential difference across device to current through it.
10. The moving part of a rotary electrical switch in certain types of electric motors or electrical generators that periodically reverses the current direction between the rotor and the external circuit.
11. The production of electric field or current due to change in magnetic flux.

1. A single resistance that could replace several resistors.
2. A region within a magnetic material in which the individual magnetic moments of the atoms are aligned with one another and they point in the same direction.
3. The flow of electric charge periodically reverses direction.
7. The two ends of a magnet
12. Space around a magnet throughout which magnetic force exists.
13. A device that uses an electric current to produce a concentrated magnetic field.
14. The unidirectional flow of electric charge.