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. :-)
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∙ 14y agoTo find the watts in a system, you can use the formula P = V x I, where P is power in watts, V is voltage in volts, and I is current in amps. For a system with 120 V and 25 A, the calculation would be 120 V x 25 A = 3000 watts.
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∙ 12y agoHow many convert 0.5 amp to my electric bill
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∙ 12y agopower = v x I
120 X 25
3000W,
1KW=1000W SO,3000 DIVIDED BY 1000
3000/1000=3KW,IT WILL DRAW 3KW THAT 25AMP 120V CIRCUIT...
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∙ 9y agoThe answer is 120 x 12.5 watts. In practice it could be less depending on the power factor.
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∙ 9y agoThe equation that you are looking for is W = A x V.
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∙ 12y ago3000 watts
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.
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.
1700/120 is 14.169 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 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 amperage, divide the wattage by the voltage. In this case, 1720 watts divided by 120 volts gives 14.33 amps.
To find the amperage, you need to know the voltage of the circuit. The formula is: Amps = Watts / Volts. If we assume a standard voltage of 120V (for US), then 87 watts at 120 volts would be approximately 0.725 amps.
I t depends. Watts = Amps times volts. 40 amps x 120 volts =4800 watts or 40 Amps x 12 volts = 480 watts.
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
To calculate the watts from amps, you need to know the voltage of the circuit. The formula to calculate watts is: Watts = Amps x Volts. So, without knowing the voltage in the circuit, it is not possible to accurately determine the wattage from just knowing the amperage.
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.