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If electric heater works on 115 V and draws 3 A of current how much power does it use?
Wiki User
∙ 14y ago
The formula you are looking for is W = I x E.
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∙ 14y ago
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An electric motor draws a current of 11.5 A in a 240 V circuit What is the power of this motor in W?
11.5 x 240 = 2760W motor.
If the current flowing through an electric heater increases from 6 to 12 amp while the voltage remains the same the heat produced by the heater will be what?
Since power is current times voltage, doubling current while keeping voltage the same will double the power. Ignoring slight non-linearity, if the power doubles, the heat will double.
When a single phase supply connect to a electric heater short circuit not there why?
The electric heater is basically a resistor, designed to have the right resistance to draw the required current. So a 2 kW heater designed for a 230 v supply is really a resistor of 28.8 ohms, so when it's connected the current is 8 amps and the power is 2 kW.
Power needed to operate a radio that draws 3.0 A of current when a potential difference of 120 V is applied?
Power is VI so 360 watts.
What does a dc power supply do in a electric motor?
A DC power supply supplies directional current in an electric motor. This is significant because many motors run on directional current, or DC power; it's easier to convert to kinetic energy than alternating current (AC), which is generally used to transmit power over long distances.
What happens when a electric heater is switched on?
The heater element is a coiled wire resistor that draws enough current to supply the intended amount of power, which might be 1.5 - 3 kW. Quickly the temperature of the wire rises until it reaches an equlibrium where the heat power conducted away by convection is the same as that draw from the power supply.
Are electric baseboard heaters efficient?
Amps and Watts measure different things. An Amp is a measure of electrical current and a Watt is a measure of Power. Which ever device draws the higher amperage will be the one that uses more electricity! Hence the 240 watt heater draw less amps even though it uses more watts: Volts Watts/Electical Current Amps/Power example heater 240 volt draws 2000/1000 watts - but uses 8.3/4.2 amps example heater 120 volt draws 1500/750 watts - but uses 12.5/6.3 amps
How a electric heater works 2 references?
An electric heater is a resistor that dissipates electric power when a voltage is connected across it and a current flows through it. The amount of power in watts is equal to the voltage times the current in amps. Typical space heaters for use in the home are 1.5 kW to 3 kW to heat a single room.
An electric motor draws a current of 11.5 A in a 240 V circuit What is the power of this motor in W?
11.5 x 240 = 2760W motor.
How many watts of power does does an electric drill use when it is plugged into 120 volts and draws 10 amps?
Power = Volts * current [p = E*I]; 120volts*10amps = 1200watts
Electric heater A has a power rating of 1kw. Electric heater B has a power rating of 800W. which transfers the most energy in 2 hours?
Electric rating of 1Kw
A 2000watt heater draws 8amps What is its rated voltage?
Power = (current) x (voltage)2,000 = 8 VV = 2,000/8 = 250 volts if the power factor is ' 1 ' and everything is operating as marked
What if your electric heater is rated 5 amps it is plugged into a 111 volt outlet how much power is generated?
OK. First, note that your heater doesn't 'generate' power. If it did, you could sell the power. Your heater consumes power. The electric company generates it, and you pay them for it. The power consumed on a household circuit is nominally (Voltage) multiplied by (Current). The voltage delivered to your house is nominally 117 volts AC, although it can vary by a bit. If the current through the heater is exactly 5 Amp, then the power is (117 x 5) = 585 watts, or 0.585 KW.
If the current flowing through an electric heater increases from 6 to 12 amp while the voltage remains the same the heat produced by the heater will be what?
Since power is current times voltage, doubling current while keeping voltage the same will double the power. Ignoring slight non-linearity, if the power doubles, the heat will double.
An electric space heater requires 29 A of 120 V current to adequately warm a room What is the power rating of the heater?
It would be P=VI, so 29A*120V=3480Watts
Why is it important that the resistance of an extension cord used to power an electric heater be kept low?
An electric heater is one of the high-power appliances in a house, commonly taking 1.5 to 3 kilowatts of power. The current is high, and therefore there is a drop in the voltage applied to the heater equal to the current multiplied by the resistance of the cord. There is probably little power wasted, because any heat from the cord goes to heat up the same room. But a voltage drop causes the heater to draw less current because its resistance is constant, and therefore less total power is provided to heat the room. If the heater is thermostatically controlled so that it is not working all the time, the difference is small because any reduction in the heater's power would cause the thermostat to keep it going for longer, to compensate.
When a single phase supply connect to a electric heater short circuit not there why?
The electric heater is basically a resistor, designed to have the right resistance to draw the required current. So a 2 kW heater designed for a 230 v supply is really a resistor of 28.8 ohms, so when it's connected the current is 8 amps and the power is 2 kW.
