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Voltage equals energy divided by charge.

Current equals charge divided by time

Conductance is the reciprocal of resistance.

Form of Ohm’s law for calculating current

Form of Ohm’s law for calculating voltage

Form of Ohm’s law for calculating resistance

Power equals energy divided by time.

Power equals current squared times resistance.

Power equals voltage times current.

Power equals voltage squared divided by resistance.

Resistance is resistivity times length divided by crosssectional area.


Output power is input power minus power loss.

Total resistance of n resistors in series





Total parallel resistance
( answer)1

Special case for two resistors in parallel

General currentdivider formula

Which ones do you measureĀ
 B and CĀ
 A is connected to the ground

