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Ch 8-9 Review

Ch 8-9 Review. What is the current flowing through this circuit? 3 A. In a circuit, 5 amperes of current passes through the light bulb. The resistance of the light bulb is 1.5 ohms. What is the voltage of the battery? V = IR 7.5 V.

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Ch 8-9 Review

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  1. Ch 8-9 Review

  2. What is the current flowing through this circuit? • 3 A

  3. In a circuit, 5 amperes of current passes through the light bulb. The resistance of the light bulb is 1.5 ohms. What is the voltage of the battery? • V = IR • 7.5 V

  4. If electricity costs 10 cents per kilowatt-hour, how much does it cost to run a 100-watt light bulb for one hour? • 100/1000=.1 x .1 = $.01

  5. Which figure(s) above is a parallel circuit? • I and II

  6. Calculate the total resistance of the series circuit if each resistor is 2 ohms. • 6 ohms

  7. What device designed to open an overloaded circuit and prevent overheating? • Circuit breaker or fuse

  8. The value of current is the same at all points in a ______circuit. • series

  9. A measure of the potential energy of an electric charge • voltage

  10. A material through which charges do not flow • insulator

  11. The flow of electric charges in a circuit • current

  12. The rate at which energy flows in a particular circuit • power

  13. Describe how you could quickly determine whether a string of lights is wired in series or in parallel. • Remove one bulb. If it's a series, all the lights will go out; if it's parallel, the remaining lights will stay lit.

  14. Which of the following is the correct relationship among power, current, and voltage? • a. P = I/V • b. V = P I • c. P = I V • d. E = P t • C

  15. The property of a material that allows charge to flow • Conductivity

  16. What electrical symbol is represented below? • resistor

  17. *** • Given an example of a series circuit. • Christmas lights

  18. What type of circuit is pictured? • series

  19. How many batteries are in the circuit below? • 2

  20. What electrical symbol is represented below? • Light bulb

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