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Electricity
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The Force between two point charges is equal to the electrostatic constant multiplied by the magnitude of the first charge, multiplied by the magnitude of the second charge, divided by the distance between their centers' squared.
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The electric field is equal to the force felt by a test charge, divided by the magnitude of the charge.
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The Voltage between two points is equal to the magnitude of the electrical field, multiplied by the distance between the two points.
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Current is equal the amount of charge that passes through a cross section of the conductor divided by the time.
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Resistance is equal to voltage divided by current. NOTE: The resistance is NOT dependent on these things. If you change one the other will change too.
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Electrical power is equal to the current squared, times the resistance.
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Electrical power is equal to the voltage times the current.
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Electrical power is equal to the voltage squared over the resistance.
Series Circuits
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The current at any point on a series circuit is the same as the current at any other point on the circuit.
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The total resistance in a circuit is equal to the first resistor, plus the second resistor, plus the third resistor, and so on.
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The total voltage is equal to the first voltage plus the second voltage plus the third voltage, and so on.
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The total current is equal to the total voltage divided by (resistor one plus resistor two plus resistor three and so on)
Parallel circuits
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The voltage between any two point on a parallel circuit is the same as the voltage between and two other points.
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The total current is equal to, the first current plus the second current, plus the third current, and so on.
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The inverse of the total resistance is equal to the inverse of the first resistor plus the inverse of the second resistor, and so on.
If any of the above was unclear, or if you have any comments or suggestions, please E-mail me!
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