Term
| Silver and copper are good ________ |
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Definition
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| What explains the relationship between current, voltage, and resistance? |
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Definition
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Term
| What unit describes the difference in electrical potential between two points in a circuit? |
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Definition
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Term
| What is the unit for current? |
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Definition
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Term
| What is the unit for resistance? |
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An electric current contains a 12 volt battery, a light bulb with 24 ohms resistance, and a switch in a series. When the switch is closed, what will be the current in the circuit?
I= V/R |
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Definition
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Term
| The electrical charge on an electron compared to the charge on a proton. |
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Definition
| equal in magnitude and opposite in sign |
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Term
| What material is the best conductor of electrical current? |
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Definition
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Term
| On what scale does water freeze at 0 degrees and boils at 100 degrees? |
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Definition
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Term
| What is the measure of the average kinetic energy of the molecules in a substance? |
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Definition
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Term
| What is the state of matter that expands to fill the available volume? |
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Definition
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Term
| What is the heat transfer by the direct contact of particles of matter? |
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Definition
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Term
| What is the amount of heat needed to raise the temperature of 1 kg to a substance of 1 degree Celsius? |
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Definition
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Term
| A gasoline engine operates between the temperatures of 500K and 300K. What is the ideal efficiency? |
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Definition
| (500-300)/ 500 = 200/500 = 40% |
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Term
| Iron has a higher melting point than water because: |
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Definition
| Iron has stronger intermolecular forces |
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Term
Which of the following materials is the best conductor of heat?
cooper
steel
wod
concrete |
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Definition
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Term
| (true or false) the natural direction of heat transfer is from a warmer object to a cooler object. |
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Definition
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Term
| What exists when there is an excess of one type of charge on an object? |
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Definition
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Term
| What explains the relationship between electric force, charge, and distance? |
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Definition
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Term
| What is the unit of electrical charge? |
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Definition
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Term
| What is a device used to demonstrate the force between electrical charges? |
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Definition
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Term
| What is one coulomb of charge passing a point in one second? |
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Definition
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Term
| Silver and cooper are good conductors because: |
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Definition
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Term
| What happens to the force between two electrons if the distance between them is tripled? |
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Definition
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Term
| Like charges _______ and unlike charges _______. |
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Definition
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Term
| A battery provides 8 joules of energy to 2 coulumbs of charge in a circuit? What is the batterys voltage? |
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Definition
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Term
| What is a material with no free electrons through which current does not flow? |
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Definition
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Term
| What is used to convery mechanical energy into electrical energy? |
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Definition
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Term
| What explains the relationship between the current created in a coil and the rate of change of the magentic field through the coil? |
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Definition
| Faraday's Law of Induction |
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Term
| What is a device used to step up or step down the voltage of an electric circuit? |
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Definition
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Term
| A transformer has 100 turns of wire on the primary input side and 600 turns on the secondary side. If the input voltage is 120 volts, what is the output voltage? |
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Definition
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Term
Which of the following will increase the strength of a magnetic field around a wire carrying a current?
increase the current
decrease the distance from the wire
both answers |
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Definition
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Term
| Like magnetic poles ________ and unlike poles ________ |
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Definition
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Term
| When a coil of wire is moved in a magnetic field, there is a force that opposes this motion. What is the source of this force? |
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Definition
| the magnetic field around the coil of wire produced by the induced current |
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Term
| (true or false)if a bar magnet is cut in half, one half will be a north pole and the other half will be a south pole. |
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Definition
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Term
| What is a circuit which contains multiple paths for the current? |
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Definition
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Term
| What kind of electricity enters your house? |
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Definition
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Term
| What is the eceltrcity produced by a battery? |
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Definition
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Term
| What is all the current entering a branch point must leave that point? |
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Definition
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Term
| What is the unit used by electric companies to measure the amount of electrical energy your home uses? |
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Definition
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Term
| In a parallel circuit, if a light is turned off, the current in the circuit ________ |
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Definition
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Term
| In a series circuit, if a light is turned off, the current in the circuit ________ |
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Definition
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Term
| (true or false)the current at every point in a parallel circuit is the same |
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Definition
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