# A circuit with 20 ohms of resistance and a current flow of 20 amps will use 6000 watts of power is this true?

P=I^2*R. No. 8,000 watts.

### What is the power of a ciruit with 10 ohmns 10 volts and 2 amps?

Well, first of all, if the resistance of the circuit is 10 ohms and you connect 10 volts to it, then the current is 1 Amp, not 2 . So either there's something else in your circuit that you're not telling us about, or else the circuit simply doesn't exist. -- If you connect some voltage to some resistance, then the resistance heats up and dissipates (voltage)2/resistance watts of power, and the power supply has…

### How do you measure electrical power?

In Watts. One Watt is equal to 1 Ampere (Amp, A, or I, a measure of current) flowing through 1 Ohm (R, a measure of resistance). Power in watts = current in amps multiplied by resistance. Power is *measured* using a meter in series with the electrical circuit, or with an Amp Clamp which is an non-contact meter which is clamped around a wire in the electrical circuit.

### A 120-volt household circuit delivers 350 watts of power to an appliance and another 10 watts of power are consumed by the circuit With no ground fault. How much current is carried by the neutral?

Here is my full question - A typical 120-volt household circuit delivers 350 watts of power to an appliance, and another 10 watts of power are consumed by the circuit. There is no ground fault. a. How much current is carried by the hot wire? b. How much current is carried by the neutral? c. How much current is carried by the grounding conductor? d. Calculate the resistance of the circuit: by "consumed by the…

### How do you calculate power loss from a resistor?

The power dissipated across a resistor, or any device for that matter, is watts, or voltage times current. If you don't know one of voltage or current, you can calculate it from Ohm's law: voltage equals resistance times current. So; if you know voltage and current, power is voltage times current; if you know voltage and resistance, watts is voltage squared divided by resistance; and if you know current and resistance, watts is current squared…

### To find the watts of electrical power in an electrical circuit?

Power = Voltage*Current. Multiply the current and the voltage. Keep your units in mind. If your voltage is Volts, and your current is in Amps, your power will be in Watts. If you are using milliamps, your power will be in milliwatts. You can also use P=I2*R. The current squared, mulitplied by the resistance of the circuit. Or P=V2/R, the voltage squared divided by the resistance of the circuit. The last two of these can…

### What is resistance power?

All resistances will emit heat energy when a current flows. The heat production rate (or power) can be found by any of these formulas: Power = Current * Voltage Power = Current2 * Resistance Power = Voltage2 / Resistance. Power is given in Watts when Current is in Amps, Voltage in Volts, and Resistance in Ohms.

### How can you determine how much power a circuit will generate if you know the voltage and resistance?

Ohms law provides the formula to determine any of the three components in a circuit voltage=E Resistance=R and Current=I so with any two you can figure out the third: I=E/R E=IxR R=E/I So to find I use I=E/R so you divide the resistance into the voltage and you have the current(in amps) or power. Power can be found using the equation: power = (voltage)2 / resistance. The Equation is PIE where P is power in…

### What happens to the resistance of a circuit when too many outlets are plugged into a 120 V outlet?

As more items are plugged into a circuit the resistance of the circuit rises. This is the same formula that you use for resistances in parallel. As each item is plugged into the circuit its resistance rises causing the current of the circuit to become higher. The breaker is in the circuit to protect the wire from overloading with the higher current . When an over limit of items are plugged in, the breaker trips…

### What are Ohms Law and the Power Law?

Ohms Law is used for the measurement of resistance. You can find the resistance in a series circuit using this equation; amps=volts/resistance or volts=amps x resistance. The Power Law is used to find the wattage in the circuit. You can find the amount of watts using this equation: watts=volts x amps. Comment Ohm's Law has nothing whatsoever to do with either resistance or power. The equation, R = E/I, is derived from the definition of…

### Why in a circuit using power I equals Watts divided by Volts when you increase voltage the current will reduce so why does this differ from Ohms law when you increase voltage the current increases?

When you increase voltage (V) then, to get the same total power (W), the current (I) must be decreased. This result comes from the Power Law: Power = voltage x current Ohms Law does not deal with power at all, it deals only with the relationship between voltage, resistance and current: Voltage = resistance x current

### What is impedance in speakers and can it be measured in watts?

Impedance in electricity is described as an opposing force to electron flow. It consists of a combination of resistance, capacitance, and inductance. This forms the actual "resistance" to electron flow in a circuit versus "pure resistance"such as a resistor added in a circuit to slow electron flow. Impedance is more prevalent in AC circuits versus DC circuits as it reacts to AC current flow much more than DC current. Current flow in a speaker circuit…

### How are volts ohms and watts affected by each other?

For a fixed resistance (ohms) current increases as voltage increases. Since Watts equals Volts x Amps x Power Factor then Watts would increase as voltage increases. The resistance would usually be fixed, but if you had a variable load resistance as the resistance decreased and the voltage remained constant, the current would increase and watts would therefore increase. Watts = Volts x Amps x Power Factor Volts = Amps x Ohms Power Factor is 1…

### A circuit consists of two resistors of 5 ohms and 2 ohms connected in series if a current of 5 amps in the circuit the power dissipated in the 2 resisters will be?

Two resistors in series, one 5 ohms and one 2 ohms, with a current of 5 amperes, will have a power dissipation of 175 watts. Ohm's law: Voltage = current times resistance E1 = I R1 = (5) (5) = 25 volts E2 = I R2 = (5) (2) = 10 volts Power law: Power = current times voltage P1 = I E1 = (5) (25) = 125 watts P2 = I E2 = (5)…

### A 75 ohm light and a 150 ohm heater are connected in parallel to a 150 volt power source What is the current through the circuit?

The effective resistance of two parallel resistances is (AB)/(A+B) = (75 x 150) / (225) = 50 ohms. Current = (Voltage) / (Resistance) = (150/50) = 3 Amperes. Check, and more details: Current through the 75-ohms = 150 / 75 = 2 Amp. Current through the 150 ohms = 150 / 150 = 1 Amp. Total current from the power supply = 2 + 1 = 3 Amp. Notice that the power dissipated by the…

### Can interesting a resistor in a circuit produce an affect similar to a short circuit?

A true "short circuit" indicates that a device or conductor having essentially no measurable (by conventional ohm meters) resistance is connected across the circuit. Thus the current flow through the "short circuit" will be limited only by the conductors supplying the current to the "short circuit", and the source of the current. But as the resistance is increased, less current will flow. If the resistance is sufficiently high so as to NOT pass current in…

### Why does an electric iron have a resistance of 15 ohms?

I never measured the resistance of an electric iron, but: the 15 ohm resistance is probably required to develop a required 806 watts of power. Using Ohm's law, I(current) = E(voltage)/R(resistance), therefore I(current) =110 volts/15 ohms = 7.33 Amps (current), and, Power (watts) = E(voltage) X I(current); 110 volts X 7.33 amps = 806 watts. The iron requires that wattage to develop enough heat in the sole of the iron. Hope this helps.

### What units are used to measure power?

Power : is the product of the voltage times the current in an electrical circuit measured in watts (P). Voltage : is the electromotive force (pressure) applied to an electrical circuit measured in volts (E). Current : is the flow of electrons in an electrical circuit measured in amperes (I). Resistance : is the opposition to the flow of electrons in an electrical circuit measured in ohms (R). Ohm's Law Just remember..."Twinkle, Twinkle, Little Star...I…