| A | B |
|---|
| What kind of energy does a battery convert to electrical energy? | Chemical |
| What is the energy change per unit charge? | potential difference. |
| What kind of current is produced by a battery? | DC |
| What kind of current is produced by most electrical generators? | AC |
| What is the power provided by drinking a can of soda with 10,000 joules of energy in 100 seconds? | 100 joules per seconds or 100 watts (10,000 J / 100s=100J/s) |
| How much electrical energy is provided by a 60-watt light bulb burning for 1000 seconds? | 60,000 joules (60W x 1000 s = 60,000J) |
| What is the power of an appliance that is linked to a 120-volt line and has 6 amperes of current? | 720 watts (120V x 6 A = 720 W) |
| Why is the Clean Air Act likely to cause unemployment in the Midwest? | Midwest coal miners will lose their jobs when the demand for high sulfur coal drops. This drop is expected because switching to low sulfur coal is cheaper than installing scrubbers that will meet popullation standards. |
| series circuit | only one path for current flow. |
| parallel circuit | multiple paths for current |
| resistance | decreases flow of current |
| circuit breaker | protects circuit from overloading with too much current. |
| switch | opens and closes circuits. |
| What unit measures potential difference? | volt |
| What unit measures current? | ampere |
| What moves through a circuit and is measured by current? | amount of charge per second. |
| What is the rate at which electrical energy is used? | electrical power |
| What property of a conductor decreases the flow of current? | resistance |
| A battery converts what kind of energy into electrical energy? | chemical |
| Electrical generators convert what kind of energy into electrical energy? | mechanical |
| What current flows in only one direction into a closed circuit? | DC |
| What current goes through a cycle and flows in both directions? | AC |
| If several appliances are linked up in a series circuit, what can be said of the current that flows ine ach appliance? | Each appliance in the series circuit will have the same current in it. |
| If several appliances are linkedup in a parallel circuit, what can be said of the current that flows in each appliance? | Each appliance in the parallel circuit may have a differnt current flowing through it. The specific current in each appliance depends on its own power. |
