HOMEPAGE | ELECTRICAL REFERENCES | FAVORITE INTERNET LINKS | HVAC/R | APPLIANCES | SAFETY PAGE | FEEDBACK
V or E = IR As this formula shows, an unknown voltage can be found by multiplying the current by the resistance value. Thus, if the current flow through a 3 ohm resistance is 20 amps, the voltage across the resistance is 60 volts. If the value of the resistance is desired, the known values of current and voltage are used for solving the problem by use of the formula: R = E/I or V/I As an example, assume that the voltage across a resistance is 50 volts and the value of the current flow is 10 amps. Dividing the E value by the I value indicates a resistance of 5 ohms.