Voltage drop

The voltage drop is the voltage that is lost in a wire due to its resistance. The voltage drop can be decreased by using shorter or thicker wire, lowering the current or using a metal with a lower resistivity.

Formulas

V is the symbol for voltage and is measured in volt (V).
ρ is the symbol for resistivity and is measured in ohm-meter (Ω⋅m).
l is the symbol for length and is measured in meter (m).
I is the symbol for current and is measured in ampere (A).

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Resistivity

Resistivity is the property of a metal to resist the flow of current. The resistivity is different for each material and it is measured in ohm-meter (Ω⋅m).