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Name ________________________________________________Date______________Period________ Chapter 14 Review parallel circuit horsepower transformer Kirchhoff’s current law alternating Section 14.1 kilowatt-hour series circuit direct kilowatt electrical power short circuit Kirchhoff’s voltage law voltage drop 1. A ___________________ contains only one path for the current. 2. According to __________________, if a circuit contains a 3-volt battery, the voltage drops around the complete circuit must add to 3 volts. 3. There is a __________________ across each resistor in a circuit when current is flowing. Section 14.2 4. ____________________ states that all the current entering a point in a circuit must also leave that point. 5. A ____________________ is created when a circuit contains one branch with very little or no resistance. 6. A __________________ contains multiple paths or branches for the current. Section 14.3 7. One _________________ equals 1000 watts. 8. The rate of converting electrical energy into another form of energy is called _____. 9. The ___________________ is a unit used by electric utility companies to measure the electrical energy your home uses each month. 10. One ______________________ is equal to 746 watts. 11. A battery creates _______________________ current. 12. Electrical appliances in your home use _______________________ current. 13. A _____________________ converts high-voltage electricity to lower voltage electricity. Reviewing Concepts and Problems 1. If there is a break in a series circuit at any point the current will do what? 2. What happens to the resistance in a series circuit if you add more devices? 3. Describe what a series circuit is. Draw an example of a series circuit with three light bulbs and a 9 volt battery. 4. What happens to the voltage in a series circuit? 5. When a new branch containing a resistor is added to a parallel circuit, the total resistance in the circuit will do what? 6. How are a parallel and series circuit different? 7. The wiring in your home is mainly uses what type of circuits? 8. Why would an appliance have a short circuit? 9. Kirchoff’s current law states what? 10. A student connects three 1-ohm light bulbs to a 9-volt battery in a parallel circuit. The total circuit current would be? 11. The power used by a circuit can be found by what formula? Please describe that formula. 12. What do you buy from the electric utility company? 13. Describe alternating and direct current. 14. A watt is a unit the represents what? 15. How much does it cost to operate a 100 watt light bulb for 10 hours if the cost of the electric energy is 10 cents per kilowatt-hour? 16. How much does it cost to operate a 1,500-watt space heater for 8 hours if the cost of electric energy is 12 cents per kilowatt-hour? 17. Give an example of a circuit that uses an alternating current and one that uses a direct current. 18. A 2000 watt electric stove is used to simmer a pot of stew. If it takes 3 hours to simmer a stew, how much would it cost to do this task if the electrical energy cost is 10 cents per kilowatt-hour. 19. How much current is used by a 1,200 watt hair dryer operating on a 120 volt circuit?