Download Name Chapter 14 Review parallel circuit horsepower transformer

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?