This Physics quiz is called 'Physics - Everyday Electrical Transfers' and it has been written by teachers to help you if you are studying the subject at senior high school. Playing educational quizzes is one of the most efficienct ways to learn if you are in the 11th or 12th grade - aged 16 to 18.
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When you consider all the everyday appliances that run off electricity, like light bulbs, TVs, refrigerators, CD players, radios, computers, vacuum cleaners, microwaves, the internet etc, it's hard to imagine life without electricity. Think of how important they are in your life - music/TV/Internet on demand, ice cream staying solid in the freezer, light to read by in the evening. Put simply, the convenience and usefulness of mains electricity to our way of life and standard of living is major.
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Electricity is a convenient form of energy that can be converted easily into many other forms of energy and made to perform various useful tasks. Yes, there are alternatives to many household appliances but they usually involve some kind of hard work or sacrifice. Take for example an everyday vacuum cleaner. This takes electrical energy and transfers it into useful kinetic energy, saving the hard work of taking up a carpet and beating it clean for several hours. It also wastes some of the electrical energy, producing heat and sound energies - but that is for another quiz!
For the exam, you are expected to know examples of energy transfers that electrical appliances are designed to make; compare the advantages and disadvantages of using different electrical appliances for a particular application; how to reduce your consumption of electrical energy; and, of course, the principle of conservation of energy...
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1.
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Energy can be transferred usefully, stored or dissipated, but cannot be created or destroyed. In the context of the above sentence, dissipated means what? |
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| [ ] |
Energy is lost into the surroundings |
| [ ] |
Energy is lost into the ground |
| [ ] |
Energy is lost into the air |
| [ ] |
Energy is recycled |
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2.
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When energy has been dissipated, it: |
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| [ ] |
can be recycled |
| [ ] |
can be recovered using a device called a heat pump |
| [ ] |
becomes spread out and less useful |
| [ ] |
is destroyed |
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3.
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What are the two most common forms of waste energy? |
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| [ ] |
Heat and light |
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Heat and sound |
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Light and sound |
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Light and kinetic |
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4.
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What are the alternative names of the energy of movement, thermal energy and radiant energy which are all types of energy that are transferred from electrical energy by domestic appliances? |
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Heat, light, sound |
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Kinetic, heat, sound |
| [ ] |
Kinetic, heat, light |
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Light, magnetic, heat |
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5.
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An air source heat pump is an electrically powered device that recovers heat energy from the air. For every kilowatt of electrical energy used, it provides three kilowatts of heat energy. Some homes are heated using a heat pump. Which of the following is not an advantage of using such an appliance when compared with the alternative of using a fossil fuel powered boiler? |
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| [ ] |
Saves money |
| [ ] |
Saves time |
| [ ] |
Reduces pollution |
| [ ] |
It is very efficient |
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6.
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Which of the following represents the energy transfers in a food mixer? |
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| [ ] |
Electrical to heat |
| [ ] |
Electrical to light and sound |
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Electrical to kinetic |
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Electrical to kinetic, sound and heat |
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7.
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Digital mp3 players have almost completely replaced portable CD players. When you compare the energy transfers, which of the following types of energy is found in one but not the other? |
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Electrical |
| [ ] |
Heat |
| [ ] |
Sound |
| [ ] |
Kinetic |
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8.
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What is the energy transfer that an electric guitar is designed to make? |
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| [ ] |
Kinetic to sound |
| [ ] |
Kinetic to elastic potential |
| [ ] |
Kinetic to electrical |
| [ ] |
Electrical to sound |
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9.
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In developing countries, many homes do not yet have a source of mains electricity and need to rely on batteries. Batteries store which type of energy? |
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| [ ] |
Chemical |
| [ ] |
Electrical |
| [ ] |
Potential |
| [ ] |
Light |
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10.
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A wind-up radio was invented to help people living in communities where it is not always possible to buy batteries. Which of the following represent the main energy changes in such a device? |
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| [ ] |
Chemical and internal to electrical |
| [ ] |
Gravitational potential to electrical and heat |
| [ ] |
Elastic potential to kinetic, electrical and sound |
| [ ] |
Gravitational potential to chemical, electrical and sound |
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1.
|
Energy can be transferred usefully, stored or dissipated, but cannot be created or destroyed. In the context of the above sentence, dissipated means what? |
|
| [x] |
Energy is lost into the surroundings |
| [ ] |
Energy is lost into the ground |
| [ ] |
Energy is lost into the air |
| [ ] |
Energy is recycled |
|
|
|
2.
|
When energy has been dissipated, it: |
|
| [ ] |
can be recycled |
| [ ] |
can be recovered using a device called a heat pump |
| [x] |
becomes spread out and less useful |
| [ ] |
is destroyed |
|
|
|
3.
|
What are the two most common forms of waste energy? |
|
| [ ] |
Heat and light |
| [x] |
Heat and sound |
| [ ] |
Light and sound |
| [ ] |
Light and kinetic |
|
|
|
4.
|
What are the alternative names of the energy of movement, thermal energy and radiant energy which are all types of energy that are transferred from electrical energy by domestic appliances? |
|
| [ ] |
Heat, light, sound |
| [ ] |
Kinetic, heat, sound |
| [x] |
Kinetic, heat, light |
| [ ] |
Light, magnetic, heat |
|
|
|
5.
|
An air source heat pump is an electrically powered device that recovers heat energy from the air. For every kilowatt of electrical energy used, it provides three kilowatts of heat energy. Some homes are heated using a heat pump. Which of the following is not an advantage of using such an appliance when compared with the alternative of using a fossil fuel powered boiler? |
|
| [ ] |
Saves money |
| [x] |
Saves time |
| [ ] |
Reduces pollution |
| [ ] |
It is very efficient |
|
|
|
6.
|
Which of the following represents the energy transfers in a food mixer? |
|
| [ ] |
Electrical to heat |
| [ ] |
Electrical to light and sound |
| [ ] |
Electrical to kinetic |
| [x] |
Electrical to kinetic, sound and heat |
|
|
|
7.
|
Digital mp3 players have almost completely replaced portable CD players. When you compare the energy transfers, which of the following types of energy is found in one but not the other? |
|
| [ ] |
Electrical |
| [ ] |
Heat |
| [ ] |
Sound |
| [x] |
Kinetic |
|
|
|
8.
|
What is the energy transfer that an electric guitar is designed to make? |
|
| [ ] |
Kinetic to sound |
| [ ] |
Kinetic to elastic potential |
| [x] |
Kinetic to electrical |
| [ ] |
Electrical to sound |
|
|
|
9.
|
In developing countries, many homes do not yet have a source of mains electricity and need to rely on batteries. Batteries store which type of energy? |
|
| [x] |
Chemical |
| [ ] |
Electrical |
| [ ] |
Potential |
| [ ] |
Light |
|
|
|
10.
|
A wind-up radio was invented to help people living in communities where it is not always possible to buy batteries. Which of the following represent the main energy changes in such a device? |
|
| [ ] |
Chemical and internal to electrical |
| [ ] |
Gravitational potential to electrical and heat |
| [x] |
Elastic potential to kinetic, electrical and sound |
| [ ] |
Gravitational potential to chemical, electrical and sound |
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