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How do you solve for current using volts and watts in a problem?
Wiki User
∙ 13y ago
Amperes measure the rate of flow of electricity in a conductor Volts measure electrical pressure Watts measure the amount of energy or work that can be done by Amperes and Volts Relationship: Work = Pressure x Flow or Watts = Volts x Amperes When you know two variables you can calculate the other Formulas - This formula referred to as the West Virginia Formula (W - VA)
Watts = Volts x Amps Volts = Watts / Amps Amps - Watts / Volts Refer to link below for more information
Wiki User
∙ 14y ago
Wiki User
∙ 13y agowatts = current * volts
current = watts / volts
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What effect are there when resistance is increased in the size of the current?
Current is inversely proportional to resistance. If you double the resistance, you halve the current. Ohm's Law: Volts = Amps * Ohms Solve for Amps: Amps = Volts / Ohms
What is the amperage in an electric circuit when the voltage 120 volts and the resistance is 40 ohms?
Ohm's Law states Voltage = Current x Resistance. You rewrite the equation as Current = Volts / Resistance to solve for current.
What muct be known to calculate current using Ohm's law?
I(current) = V(voltage)/R(resistence) Example : 220 V / 5000 Ohm = 0.044 A (Ampère) = 44mA
What is the correct calculation for voltage if the resistance is 3 ohms and the current is 4 amps?
What you are talking about is the electrical potential, or voltage, necessary to produce a current of 4 amps through a material with a resistance of 3 ohms. The typical way to solve such a problem is by using Ohm's Law, stating that the current produced is proportional to the potential across the resistor but inversely proportional to the resistance. In other words, I = V / R, where I is the current in amps, V is the electrical potential in volts, and R is the resistance in ohms. Here we know R and I, so we rearrange this equation to get V by itself: V = I * R. So, to get the answer, multiply your 4-amp current by your 3-ohm resistance, and you will get 12 volts.
I'm using a 18.5 volts 3.5 amps charger to charge a 12 volts battery I want to reduce voltage to 15 volts and current to about or a little less than 2 amps How to reduce charging current and voltage?
You need a regulator.
What effect are there when resistance is increased in the size of the current?
Current is inversely proportional to resistance. If you double the resistance, you halve the current. Ohm's Law: Volts = Amps * Ohms Solve for Amps: Amps = Volts / Ohms
What is the amperage in an electric circuit when the voltage 120 volts and the resistance is 40 ohms?
Ohm's Law states Voltage = Current x Resistance. You rewrite the equation as Current = Volts / Resistance to solve for current.
What is the resistance of a lamp operating at 115 volts and using 0.25 amperes of current?
The resistance of a lamp operating at 115 volts and using 0.25 amp of current is 460. The relationship I used is Ohm's law.
What muct be known to calculate current using Ohm's law?
I(current) = V(voltage)/R(resistence) Example : 220 V / 5000 Ohm = 0.044 A (Ampère) = 44mA
What is the correct calculation for voltage if the resistance is 3 ohms and the current is 4 amps?
What you are talking about is the electrical potential, or voltage, necessary to produce a current of 4 amps through a material with a resistance of 3 ohms. The typical way to solve such a problem is by using Ohm's Law, stating that the current produced is proportional to the potential across the resistor but inversely proportional to the resistance. In other words, I = V / R, where I is the current in amps, V is the electrical potential in volts, and R is the resistance in ohms. Here we know R and I, so we rearrange this equation to get V by itself: V = I * R. So, to get the answer, multiply your 4-amp current by your 3-ohm resistance, and you will get 12 volts.
I'm using a 18.5 volts 3.5 amps charger to charge a 12 volts battery I want to reduce voltage to 15 volts and current to about or a little less than 2 amps How to reduce charging current and voltage?
You need a regulator.
What is the value of current at zero volts?
Zero volts produces zero current.
Which current used in cars?
12 volts DC current except the current to the spark plugs which can be 12,000 volts up to as much as 45,000 volts.
If the current is 5 what is the volts?
the volts are 230
How many volts would does it take to operate a DVD player with 550 ohms resistance and a current of 0.2 amps?
In the U.S. 120 volts. <<>> Using the equation E = I x R, Volts = Amps x Resistance = 110 volts.
Find the current for a 14.1 kV circuit with 32.7 MW?
To solve this problem, we use the definition of power. Power is measured in watts and is defined as P = V x I, where P is power (Watts), V is voltage (Volts) and I is current (Amps). Solving this equation for I, we get I = P / V. Using the SI prefixes "kilo"=1,000 and "Mega"=1,000,000 we can establish that 14.1kV = 14,100V and 32.7MW = 32,700,000W. Thus, I = (32,700,000 / 14,100) = 2319.1 Amps.
What is the current in an circuit with 120-volts and a 60-watt light bulb?
Use the formula P= VI (power = potential x current) where (watts = volts x amps). The current I in amperes is equal to the watts divided by the volts, 40/120. The bulb is using 1/3 amp of current.
