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How much resistance must be placed in a 110 volt circuit in order to limit the current to 2 amps?
Wiki User
∙ 12y ago
Ohm's Law: Resistance = Voltage divided by current
110 volts / 2 amperes = 55 ohms
Note: This represents 220 watts, which is a considerable amount of power for a resistor. In all likelihood, the resistance will change as a result of that amount of power (heat) so the end result, 55 ohms, is only valid as an absolute number, in that 55 ohms is the answer, but the cold value of the resistor is uncertain.
Wiki User
∙ 12y ago
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