Electricity Definitions

5. the total current entering a junction is _____ to the total current leaving the junction
6. a material that has zero resistivity at and below a critical temperature
7. difference the work done per unit charge
9. the rate of flow of charge
12. _____________ force, the electrical energy per unit charge produced by the source
15. a small coil of wire that heats up as current passes through it, producing light as a result
16. a device whose resistance decreases as light intensity increases
18. a word placed before ammeter and voltmeter to describe them as functioning perfectly
20. ________ pd, the electrical energy supplied per unit charge supplied to the external components within the battery
21. a device which measures the rate of flow of charge

1. an arrangement of resistors in series, pd across components can be varied from zero to the pd of the supply
2. a measure of the difficulty of making the current pass through the component
3. ________ resistance, the resistance of materials
4. a device whose resistance changes as temperature changes
7. the energy transferred per unit time
8. in this type of circuit the pd across each branch is equal
9. negative temperature ___________, the resistance of a component decreases as temperature increases
10. in this type of circuit the current passing through each component is equal
11. a device which measures the electrical energy difference between electrons entering a component and electrons leaving a component
13. an electrical source of energy
14. ___'s Law the pd across a conductor is directly proportional to the current flowing through it
17. ________ resistor, a device used to vary the current through a circuit
19. a device that allows current to flow in one direction, but very little current to flow in the opposite direction