# Electricity Exam Review: Question Preview (ID: 24081)

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A calculator uses a 9 Volt battery and draws 0.1 A of current. How much power does it use? |
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a) 0.9 watts | b) 0.9 kW | c) 90 watts | d) 90 kW | |

Use Ohm's Law to determine the current found in a circuit that has a 1.5 V battery and a light bulb with a resistance of 2 Ohms. |
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a) 3 Amps | b) 1.33 Amps | c) 1 Amp | d) 0.75 Amps | |

Which of the following would not make an electromagnet stronger? |
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a) add more coils | b) wrap the coils more tightly together around the iron core | c) use less coils | d) use a stronger voltage source | |

The measurement of the movement of electrons in a circuit is the ___. |
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a) voltage | b) current | c) resistance | d) energy | |

Ohm's Law states that ___. |
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a) the voltage is equal to the current divided by the resistance | b) the current is equal to the voltage times the resistance | c) the resistance is equal to the voltage times the current. | d) the current is equal to the voltage divided by the resistance. | |

The type of current that flows in only one direction through a wire is known as |
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a) direct | b) alterior | c) alternating | d) series | |

The rate at which electrical energy is converted to another form of energy is known as ____. |
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a) electrical currents | b) electrical power | c) electrical voltage | d) electrical voltage difference | |

To find the electrical power you would use the following formula: |
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a) current/voltage | b) current/resistance | c) current x voltage | d) current x resistance | |

Resistance can change electrical energy into ____ energy and ____. |
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a) current, thermal | b) light, current | c) thermal, light | d) thermal, voltage | |

Which of the following prevents electrical fires and is composed of plastic that melts if a circuit becomes to hot? |
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a) circuit breaker | b) fuses | c) resistors | d) batteries | |

The type of closed circuit in which you can add or remove light bulbs with no effect on the other bulbs in the circuit. |
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a) parallel | b) open | c) series | d) static | |

The two types of closed circuits are |
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a) series and parallel | b) series and potential | c) parallel and open | d) parallel and static | |

The type of closed circuit in which the electrons have only one path or loop to travel through is known as a ___ circuit. |
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a) parallel | b) open | c) series | d) static | |

A device that changes electrical energy into mechanical energy is known as a(n) |
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a) generator | b) electrical motor | c) resistor | d) fuse | |

The current in a circuit is measured in ____. |
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a) amperes | b) volts | c) ohms | d) watts | |

The measurement of the electrical potential difference between the positive and negative portions of a battery is known as ____. This is the force that pushes the current along the circuit. |
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a) current | b) watts | c) amperes | d) voltage | |

What units are used to measure resistance? |
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a) Ohms | b) Volts | c) Amperes | d) Watts | |

The measurement of how the device or material reduces the electrical current that flows through it is called the ___. |
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a) voltage | b) circuit | c) resistance | d) fuse | |

A toy car with a resistance of 20 Ohms is connected to a 3 Volt battery. How much current flows in the car? |
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a) 60 Amps | b) 6.67 Amps | c) 0.15 Amps | d) 23 Amps | |

The current flowing in an appliance connected to a 120 Volt source is 2 Amps. How many KILOWATTS of power does the appliance use? |
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a) 240,000 | b) 2.4 | c) 240 | d) 0.24 | |

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