Across
- 1. A car battery uses 20 A for 10 s to start the engine. How many electrons pass during this time?
- 4. a transistor radio uses 0.24 milliamps of current when it is operated by a 1.50 volt battery. What is the resistance of the radio's circuit?
- 6. How long would it take for a current of 1.68 amps to transfer 0.0772 Coulombs past a given point?
- 7. A lamp is plugged into 120 volts. What is the lamp's resistance if the current is 75 milliamps?
- 8. One ampere A is charge flowing at the rate of one _____ per second.
- 11. The unit of resistivity is the _____
- 13. Often contain one or more resistors grouped together and attached to an energy source
- 16. Property of a material that determines its electrical resistance R.
- 17. Larger areas offer ____ resistance.
- 18. Electric current I is the rate of the flow of ____ Q through a cross-section A in a unit of time t.
Down
- 2. A motor circuit has a resistance of 28.6 ohms. If the current through it is 0.844 amps, what is the potential difference in this circuit?
- 3. The electric current in a wire is 6 A. How many electrons flow past a given point in a time of 3 s?
- 5. When a 3-V battery is connected to a light, a current of 6 mA is observed. What is the resistance of the light filament?
- 8. a flow of electric charge
- 9. States that the current I through a given conductor is directly proportional to the potential difference V between its end points.
- 10. A circuit's resistance is 14.3 ohms when connected to a 12 volt battery. Find the current.
- 12. The direction of e- flowing from – to +.
- 14. Longer materials have greater ______.
- 15. The ____ temperatures usually result in higher resistances.