Stable voltage across the motor = (120 - 72) = 48 V R = E / I = 48/3 = 16 ohms. (Assumes power-factor of 1, no reactances, back-emf in phase with the line, etc.)
portable electric vacuum cleaner
Although it is called a vacuum cleaner, it does not actually create a vacuum. Inside the cleaner there is an electric motor which drives a fan blade. This fan blows air out of the vacuum cleaner and this causes air to be drawn in to the cleaner at the other end. Thus the cleaner works by creating an air flow, not a vacuum.
Ives W. McGaffney, of Chicago, created a mechanical machine in 1868.Hubert Cecil Booth, an English engineer, built an electric vacuum cleaner in 1901.Daniel Hess invented the vacuum cleaner in 1860.thomas EdisonOtto Von GuerickeDavid Hess did.Ives McGaffeyIves McGaffey
If the vacuum cleaner is powered by electricity this is used to turn the electric motor which is needed to create the suction or vacuum. That motor either has permanent magnets inside it, or the current passes through many "turns" of wire to create magnets when you switch the cleaner on. Early experiment in electricity showed that if a wire is moved in a magnetic field some current is created. Similarly, if a magnet is moved near to a wire the same result occurs. So, yes the cleaner does need a magnet.
The cord of a vacuum has a certain amount of resistance in it, even though it is made of copper. Forcing current through a resistor creates heat, and the cord is going to get warm after the machine is operated for a while.
the vacuums go back to the mid 1800s but they became electric in 1910 for the vacuum cleaner , 1931 for the electric guitar.
Most vehicles harm the environment, including electric trains, however, electric vehicles are cleaner than gasoline and diesel powered vehicles because some electricity is generated from renewable sources like water, wind and sun.
electric has better performance and is cleaner but nitro can fly for ever if you have enough fuel
Not as quick, but then it frees time up for the would be human cleaner. Quality is not a big difference.
James Murray Spangler invented the first motorized, portable vacuum cleaner. Spangler was a janitor in Ohio and used an electric fan, a box, and one of his wife's pillowcases.
The Cleaner - 2008 Path of Least Resistance - 2.9 was released on: USA: 18 August 2009 Hungary: 2 March 2010 Finland: 1 March 2012
There are many advantages of electric power over gas power. Electric power does not require fuel to work and electric can be a cleaner source of power.
Use an antique hand pumped vacuum cleaner (they existed before the electric ones).
it is educational methods and theories
The baby company
The Cleaner - 2008 Path of Least Resistance 2-9 was released on: USA: 18 August 2009 Hungary: 2 March 2010 Finland: 1 March 2012
Cleaner air and slightly less noise.