Conversion Calculators

Voltage Dropped and Power Dissipated Across a Series Resistor

Any resistor in a circuit that has a voltage drop across it dissipates elecrical power. This electrical power is converted into heat energy, hence all resistors have a power rating. This is the maximum power that can be dissipated from the resistor without it burning out. The rate of conversion is the power of dissipation.

Power dissipation is a measure of how much power (P = I x E) in a circuit is converted into heat.

Voltage Dropped and Power Dissipated
across a Series Resistor

Resistor Impedance (Z)


Current (I)


Voltage Dropped (V)


Power Dissipated (P)



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