| A | B |
|---|
| Electrical Charge | This is why bits of paper stick to a plastic comb that has been rubbed |
| Touch an electroscope with a negatively-charged rod | Charging by conduction |
| Charging by induction | no charges are separated |
| Electric field | force per unit charge |
| force on a test charge in an electric field | directly proportional to the magnitude of the field |
| As an electric field becomes stronger, the field lines shoulb be drawn | closer together |
| The work done moving a test charge from one point to another | electric potential difference |
| The equation for the potential difference between two points in a uniform electric field | V=Ed |
| Touching an object to earth to eleiminate excess charge | grounding |
| Where charges are found on a hollow conductor | on the outer surface |
| capacitor | a device that stores a charge, made up of two conductors separated by an insulator |
| The rate at which energy is transferred | power |
| The resistance of a conductor can be determined if these are known | potential difference and current |
| The current flowing in an electric circuit can be increased by | increasing voltage or decreasing resistance |
| a device that measures the amount of current in a circuit | ammeter |
| measure of energy used by utility companies | kWh |
| The resistance required by an ammeter | low |
| the resistance required by a voltmeter | high |
| the way a voltmeter is connected in circuits | parallel |
| the way an ammeter is connected in circuits | series |
| equivalent resistance in a series circuit | R1+R2+R3 |
| equivalent resistance in a parallel circuit | 1/R=1/R1+1/R2+1/R3 |
