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Firstly, ohms are not given out by Watts; each is a completely different unit. Secondly, without knowing the current, the resistance cannot be calculated from the informatio given.
Ohms Law states: Volts = Amps x Resistance (In Ohms)
Watts = Volts x Amps
Resistance = Watts / (Amps x Amps) or (Volts x Volts) / Watts
If you are referring to normal residential voltage just insert that value for volts in any of the equations above.
Additional information:The resistance of a 12 AWG solid copper wire is about 5.21 ohm/km compared to 5.32 ohm/km for a 12 AWG stranded wire.
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A hot-water heater has an 8-ohm element that operates at 240 V The power that's consumed by this water heater is?
VOLTS x (VOLTS/OHMS) = WATTS 240 X (240/8) = 7200 Watts = 7.2KWatts
Why does a hairdryer on the 240 volt setting work in the US and does this mean the switch to change the voltage is faulty and it's not really operating on 240 volts?
Hair dryers usually have a HIGH and a LOW setting. The HIGH heating element is about 8 ohms. The LOW heating element is about 32 ohms. voltage (squared) / resistance = power (watts) 120*120 / 8 = 1800 watts ( HIGH ) 120*120 / 32 = 450 watts ( LOW ) When the voltage switch is set to 240 volts, ALL it does is limit the HIGH/LOW switch to the LOW setting. 240*240 / 32 = 1800 watts ( LOW ) 240*240 / 8 = 7200 watts ( HIGH ) (the heating element would burn out)
What is the function of 240 ohms resistor?
To provide 240 ohms of resistance. What those 240 ohms do in an actual circuit depends on the intention of the designer.
How many watts does my cigarette lighter put out It says it's rated for 12vdc-20amps?
That depends on the resistance (in ohms). We can't tell you the wattage without knowing that.
How many watts does 20 amps at 240 volts produce?
The unit of power is expressed in watts, and the product of current (Amps) and voltage (volts) is power there fore if you multiply the amps and the volts give watts. so 20 x 240 will give you a 4800 watts of power.
Input 100-240 V 50-60Hz 1.5A 1 5A what is power in watts?
100v at 1A is 100 watts, 240 v 5A is 1200 watts. The other numbers give intermediate amounts of watts.
You have 240 volts20 amperes and how many ohms?
R = U / I = 240 / 20 = 12 Ohms.
How much current at 240 volts passes through a wire with a resistance of 100 ohms?
current = voltage/resistanceAssuming the 240 volts is across the 100 ohm wire, 2.4 amperespower = current * voltageResulting in the wire dissipating 576 watts... One hot wire!
How many watts in 240volts?
There are zero watts in 240 volts. To determine watts, an amperage or a resistance must be supplied. W = Amps x Volts, W = Amps (squared) x Resistance (in Ohms), or W = Voltage (squared)/Resistance.
Can a 200 volt appliance operate on a 240 volt circuit?
No, this should not be done. If the appliance is a heater it will operate over its given specified wattage. A 200 volt heater run off of 240 volt will have an output increase. Ohms law stated that current is directly proportional to the applied voltage and inversely proportional to the resistance of the circuit. A 240 volt heater can be run off of a 200 volt supply but the wattage will be reduced. For example if the heater is 5000 watts at 200 volts, the current is I =W/E 5000/200 = 25 amps. The resistance of the heater is R = W/I (squared) =5000/25 x 25 (625) = 8 ohms. Applying 240 volts on the same heater whose resistance is 8 ohms results in this new heater wattage rating. W = E (squared)/R = 240 x 240 (57600)/8 = 7200 watts. This is 2200 watts higher than the manufacturer's safety rating. W = watts, I = amperage, R= resistance in ohms and E = voltage.
An electric clothes dryer has a resistance of 8 ohms It draws 30 A of current What is the voltage in volts of the wall outlet that it is plugged into?
Power (Watts) = Current (Amps) * VoltagePower = 22Amps * 240 VoltsPower = 5,280 Watts5280
How much current must flow to carry 240 watts at 120 volts?
240 watts at 120 volts requires 2 amperes. Power = voltage * current
