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What is voltage of a circuit with 15 amps of current andtoaster with 8ohms of resistance?
Wiki User
∙ 13y ago
V=I*R
Where:
V is voltage
I is the current in ampers
R is resistance in ohms.
So, if the current is 15 A and the resistance is 5 ohms, then the voltage must be 15 A *5 ohms = 75 V.
Wiki User
∙ 15y ago
Wiki User
∙ 14y agoIf current of 15 amps runs through a hair dryer while the resistance is 10 ohms voltage is 150 volts.
Ohm's law: voltage equals current times resistance.
Note: 150 volts is inconsistent with normal US household voltage of 120 volts. Also, 15 amps is more than the normally allowed (80% or so) average current permitted for a 15 amp circuit. This question is either theoretical, or it is invalid.
Or, perhaps, you are not considering that cold resistance is not the same as hot resistance. Heating elements have a positive temperature coefficient, so the actual resistance at operating point is probably more than 10 ohms. The comment about 15 amps remains an issue.
Wiki User
∙ 13y agoOhm's Law states that V=I*R. In this case, I=15 Amps and R=8 Ohms. The voltage therefore will be 120 volts.
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