Study Guide
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| A device that increases or decreases voltage in a power line is called a? | transformer
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| Current that does not reverse direction is called? | Direct current
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| The location of the strongest magnetic force on a magnet are the? | magnetic poles
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| Current that reverses direction in a regular pattern is called? | alternating current
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| The region around a magnet where the magnetic forces act is the? | magnetic field
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| Objects that keep their magnetic properties for a long time are called? | permanent magnets
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| An instrument that measures electric current is a? | galvanometer
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| A reversing switch that rotates with the coil in an electric motor and reverses the direction of the current every half turn is a? | commutator
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| A device that increases or decreases the voltage of an alternating currient is a? | transformer
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| The function of an electric motor is to change electrical energy to? | mechanical energy
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| The function of a generator is to change mechanical energy to? | electrical energy
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| What attracts iron objects? | magnets
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| What is the process of producing an electric current by moving a loop of wire through a magnetic field? | electromagnetic induction
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| A galvanometer measures? | electric current
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| A transformer that increases voltage is a? | step-up transformer
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| Alternating current is transmitted across large distances at high voltage to minimize energy loss as what? | heat
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| Groups of atoms with aligned magnetic poles are called? | magnetic domains
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| What happens to the strength of magnetic force in an electromagnet when you increase the current through the coil? | increases
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| When you bring the south ends of two magnets together, what happens? | repel
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| An electric motor is used to change electrical energy into what type of energy? | mechanical
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| Moving a wire through a magnetic field creates what type of current in the wire? | electrical
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| Paper clips can become what type of magnet? | temporary
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| The gauges on the dashboard of a car are called? | galvanometers
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Created by:
bcalvert