The formula you are loking for is W = E xE/R.
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The question is a little vague, but assuming you mean that the 120 volts is measured across the portion of the circuit having the 0.5 ohm resistance, then the answer is 28,800W dissipated in that resistance. The basic formula for power dissipation is current (measured in Amperes) X electromotive force (measured in Volts). We typically write this as P = IV or sometimes P=IE, where P represents power in Watts, I represents current in Amps, and V or E represent electromotive force in Volts. In the example cited in your question, we have the voltage, but we don't have the current. Since we do know the resistance, though, we can calculate the current from ohms law, which states that the voltage will always equal the product of resistance and current. We write this as V = IR, where V and I are voltage and current as above, and R represents resistance in Ohms. We can manipulate this expression to give us the current from voltage and resistance as I = V/R. Now we plug this expression into our power expression by substituting V/R in place of I.
P = IV becomes P = (V/R)V. Which we clean up to get P = V^2/R, where V^2 means the square of the voltage.
So, using this expression for the example we get P = 120*120 / 0.5 = 28,800W. :-)
To convert watts to amps at 120 volts, use the formula: Amps = Watts / Volts. For 1500 watts at 120 volts, the calculation would be: 1500 watts / 120 volts = 12.5 amps.
5.8 amps
To calculate the watts, you can use the formula: Watts = Amps x Volts. In this case, 100 amps x 120 volts equals 12,000 watts.
To calculate amps, you can use the formula: Amps = Watts / Volts. In this case, 500 watts divided by 120 volts equals approximately 4.17 amps.
To calculate the amps, divide the power in watts by the voltage. If the voltage is 120V, then 320 watts would be approximately 2.67 amps.
To convert watts to amps at 120 volts, use the formula: Amps = Watts / Volts. For 1500 watts at 120 volts, the calculation would be: 1500 watts / 120 volts = 12.5 amps.
5.8 amps
You just have to divide the watts by the voltage to find the amps. For example 60 watts on a 120 v system would take ½ amp.
To calculate the watts, you can use the formula: Watts = Amps x Volts. In this case, 100 amps x 120 volts equals 12,000 watts.
1700/120 is 14.169 amps
To calculate amps, you can use the formula: Amps = Watts / Volts. In this case, 500 watts divided by 120 volts equals approximately 4.17 amps.
I t depends. Watts = Amps times volts. 40 amps x 120 volts =4800 watts or 40 Amps x 12 volts = 480 watts.
To calculate the amps, divide the power in watts by the voltage. If the voltage is 120V, then 320 watts would be approximately 2.67 amps.
To calculate the amps for 115 watts, you need to know the voltage the appliance is operating at. If the appliance is operating at 120 volts, then the current would be approximately 0.96 amps (115 watts / 120 volts).
1000 watts at 9.5AMPS in 120 volt = 4.7 AMPS in 240 volt ..........Divide that by 2 according to the choice of voltage... 500 watts (120V) + 4.7Amp
You just have to divide the watts by the voltage to find the amps. For example 60 watts on a 120 v system would take ½ amp.
To calculate the amperage, divide the wattage by the voltage. In this case, 1720 watts divided by 120 volts gives 14.33 amps.