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What is the power of a motor that draws 500 milliamps using 4 volts?
Wiki User
∙ 12y ago
When 500 mA of current is flowing from a 4-volt supply, the supply is delivering
2 watts of electrical power. We can't tell how much of that power is actually
available from the motor in the form of mechanical power, and how much of it
is only heating up the parts of the motor.
Wiki User
∙ 12y ago
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Is 575 volt more deadly than 220 volt as it draws less amps than the 220 and I thought it was the amps that were dangerous?
Yes 575 volts is more deadly than 220 volts. The higher the voltage becomes the higher the current becomes through a set resistance. A normal dry body's resistance from thumb to thumb is about 2.6 meg ohms. This is the body's outside resistance from point to point and not the body's internal resistance. The body's internal resistance is in the neighbourhood of 1000 ohms. Using a voltage of 220, the formula is , Amps = 220/1000 = .22 amps or 220 milliamps Using a voltage of 575, the formula is , Amps = 575/1000 = .575 amps or 575 milliamps. As you can see as the voltage goes up so does the amperage. The following list is the tolerances that the body can stand. Remember 1 amp is equal to 1000 milliamps. Less than 1/2 milliamp no sensation 1/2 to 2 milliamps Threshold of perception 2 to 10 milliamps muscular contraction 5 to 25 milliamps painful shock (may not be able to let go) Over 25 milliamps Could be violent muscular contraction 50 to 100 milliamps Ventricular fibrillation over 100 paralysis of breathing.
What is the break drum radius for a single phase induction motor?
The correct spelling is 'brake' rather than 'break', but the 'drum' you refer to is used when testing the output power at the shaft of an induction motor. The diameter will depend on the power of the motor, and the test equipment used. 'Brake power' refers to the output power of the machine measured in watts or, in the United States, in horsepower. If you know the output power (by conducting this test) and the input power (using a wattmeter), then you can determine the machine's efficiency.
What is stronger higher amps or watts in a electric motor?
Amps and Watts measure different things. An Amp is a measure of electrical current and a Watt is a measure of Power. You can relate the two if you know the Voltage. For example, if your car has a 12V battery and your stereo draws 10 Amps of current, you are using 120 Watts of power. [Power in Watts] = [Voltage in Volts] x [Current in Amps]
What kind of power supply do you use to run a single phase one half horsepower electric motor?
It all depends upon the type of motor you are using. Not all motors are the same. Just because it says "single phase one half horsepower electric motor" in the description, does not mean that all these motors are the same. They are not the same. There are differences from one make and model compared to another. One country might use 60-HZ, and another country might use 50HZ. The power source must be matched to the motor. There should be a Tag on the Motor itself, telling you exactly what the power requirements are. If you are in the United States, and if the motor is rated at 120-VAC, 60-HZ, all you have to do is hook-up a circuit breaker in series with one of the power leads, and attach a ground lead to the case of the motor, and plug it into any standard wall outlet. Make sure the power source is matched to the information on the Motor, otherwise the motor could be damaged, and some of the electrical hookup wiring could be burned, and your safety might be at risk. Don't take chances. Make sure the tag on the motor matches the power source you are using.
What size resistor do you need to power a 14 volt bulb from a 120 outlet?
To find the resistance necessary, one would need to know how much current the bulb draws. If one knows the current the bulb draws, then one would subtract the 14 volts from 120 volts then divide that by the current the bulb draws and one will find the resistance needed. Once this has been done, one would need to multiply the current drawn by the voltage drop to get the wattage rating necessary. Another important detail to note is that the power dissipated by the resistor will be much greater than the power consumed by the bulb itself. Finally if the bulb burns out the voltage across the contacts will be 120V. I would not recommend using this method to drop the voltage for the bulb.
What is a hydrostatic system?
Hydrostatic systems take the mechanical rotary output of an engine or electric motor and convert it to a hydraulic source of power using a hydraulic pump. The hydraulic power is converted back to mechanical power using a hydraulic motor
What methods can you use to power and control a small electric motor using an Arduino without directly drawing power from the Arduino?
Have the Arduino control a relay that connects an external power source to the motor.
Does using a 40 watt light bulb in a 60 watt rated socket cause harm to the socket?
No. It just draws less power.
Why the armature of a dc motor draws more current at the time of starting?
With increasing torque load the armature tends to slow down; the motor draws more current to compensate, and if there is armature resistance the back emf generated by the armature falls to allow the increased current to flow, which causes the motor to settle at a lower speed. The mechanical output power is the speed times the torque, and increasing the torque increases the power output provided the speed does not drop much.
Is 575 volt more deadly than 220 volt as it draws less amps than the 220 and I thought it was the amps that were dangerous?
Yes 575 volts is more deadly than 220 volts. The higher the voltage becomes the higher the current becomes through a set resistance. A normal dry body's resistance from thumb to thumb is about 2.6 meg ohms. This is the body's outside resistance from point to point and not the body's internal resistance. The body's internal resistance is in the neighbourhood of 1000 ohms. Using a voltage of 220, the formula is , Amps = 220/1000 = .22 amps or 220 milliamps Using a voltage of 575, the formula is , Amps = 575/1000 = .575 amps or 575 milliamps. As you can see as the voltage goes up so does the amperage. The following list is the tolerances that the body can stand. Remember 1 amp is equal to 1000 milliamps. Less than 1/2 milliamp no sensation 1/2 to 2 milliamps Threshold of perception 2 to 10 milliamps muscular contraction 5 to 25 milliamps painful shock (may not be able to let go) Over 25 milliamps Could be violent muscular contraction 50 to 100 milliamps Ventricular fibrillation over 100 paralysis of breathing.
Is the current produced by a dc motor the same as the current given to it?
A motor uses electricity; it does not produce it. If you are somehow using a DC motor as a generator, then it will produce power equal to the input power minus the motor losses. If the input power is you spinning the rotor, the output power will be directly proportional to how much work you put into spinning the rotor.
What are the advantages of using electromagnetic force to power a motor?
Electromagnetism is an efficient way in which to turn a motor. It does not produce pollution and it is otherwise environmentally safe.
Does the air conditioner really waste gasoline?
Yes, it uses power and this power must be generated by the motor using more petrol.
When power a fan using a simple electric motor the fan's shaft and blades are attached to?
Fans shaft and blades are attached to rotor shaft of the motor
Sunroof won't open in a 2002 Lincoln ls?
Check the fuse for the sunroof. if it is good check for power (12volts) at the motor when using the switch. if there is power most likely you'll need a motor if you have the means you can also put 12volts to the motor to see if it operates.
When using electronics what device is capable of changing DC to AC?
A device called a power inverter.In old vacuum tube radios an electromechanical device called a vibrator was used.Another device is a motor-generator using a DC motor and an AC generator.
What is a RC car esc?
an electornic speed controller. It controls the speed of the motor using high power transistors.
