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27 Cards in this Set
- Front
- Back
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opposite charges
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attract
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like charges
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repel
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atom loses electrons it becomes
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POSITIVE
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atoms gain electrons, it becomes
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negative
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type of current in a battery
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direct
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type of current in house/school
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altrnating
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allows electricity/ metals
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conductors
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does not allow electricity/ rubber wood
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insulators
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has one path and if ano goea out, the restare is dead
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series circuit
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has more than one path and if one goes out, the rest are ok
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parallel circuit
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provides electrical safety in circuits
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circuit breaker and fuse
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force a magnet exerts
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magnetic force
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relationship between magnetic force and distanace
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magnetic force decreases as distance increases
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earth is surrounded by a magnetic field calledf
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magnetosphere
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magnetosphere protects us against what
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v.s. sun
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what is true about magnetic poles
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force is strongest at the poles
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how do u demagnetize a magnet
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by hitting it with a hammer or heating it up
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why do wires have plastic or a rubber coating
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acts as an insolatotor
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what does a fuse do
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prevents overheating due to current over load
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what does a current breaker do
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opens when the current in a circuit is too high
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alternating current
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a flow of electric charge that regularly reverses it direction
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direct current
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flow of electrical charge in only one direction
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a material has a net electric charge bc it
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has an excess or shortage of electrons
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static electricity is the study of
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buildup of charge, electric dishcharges, and electric fields
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wat material easily carries a current
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conductor
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what melts to protect a current
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fuse
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why does a wire becomes warmer when charges flow through it
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has an insulator
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