| A | B |
|---|
| An electroscope detects | static electric charges |
| The nucleus of an atom was discovered by | Ernest Rutherford |
| The nucleus contains | tiny positively charged particles |
| The amount of + or - charge | is measured in coulombs |
| Photocopiers and Cling Wrap both | put static electrical charges to good use. |
| Stored energy is called | potential energy |
| Chemical cells use potential energy | to produce a difference in electrical potential |
| Voltage is the amount of electrical potential | energy supplied per coulomb of charge transferred |
| Convention current is defined as flowing | from + to - terminals. |
| Electrons moves easily | in conductors |
| Electrons do not move easily | in insulators |
| Filaments in incandescent bulbs | are resistors |
| Resistance is measured in | Ohms |
| Resistance equals voltage | divided by current |
| Static charges result when | an object has an excess of electrons |
| When an object has a deficiency of electrons | a static charge results |
| Ohm's law states that the current | through a material is proportional to the voltage |
| AC current flows first in one | direction and then in the other |
| Anode | A positively charged electrode |
| A circuit breaker is designed | to be a safety device |
| Direct current flows in | one direction only |
| An electrolyte is a substance that dissolves | in water to form a solution that conducts electricity |
| A galvanometer measures | small electric currents |
| A - charge results when an object | contains more electrons than protons |
| One Ohm equals | one volt per ampere |
| A photovoltaic cell converts light | energy directly into electrical energy |
