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the polarity of electric current is changed as u connect neutral with active and active with neutral so it can work but it effect the performance and some time it can be hazardious
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Active, neutral, and ground, are actually ways of telling electropotential in relation to another voltage level. If you have 120 volts coming into your home, that means the difference between the active potential coming into your home and ground is 120 volts, because ground is taken as zero volts. The reason ground is so much lower than the active line is that you want all high electropotentials to drain away after the circuit is broken. If you look on an electric circuit diagram, you will notice the ground as a line off of the circuit, ending with a triangular set of horizontal lines, as if it were dying away. This ground in the circuit draws all currents from all connections toward it. When switches in the circuit are in one direction, a current flows. When in another direction, it might stop, but often it can flow in a different direction, as in a transistor or a set/reset circuit. Ground makes all currents drain away from the circuit.
The neutral cable is not zero. It is actually an electropotential that is higher than ground but lower than active. The reason that you have it is so that the circuit will work, that the electricity flows in the correct direction when the appliance is on.
If the neutral cable is connected to the active cable, the circuit will still work, but it could be dangerous because the current might not flow the direction that you want. Or it might go back and forth because the electropotentials are not different. You could generate a lot of resistance which builds up heat, cause an arc with electricity jumping an air gap, and start an electrical fire that won't be put out without turning off the appliance. This is why ground is so necessary.
To make a circuit work properly, when the circuit is followed back to the beginning, the electricity must go into the starting point at zero volts. To have anything more is to set up a feedback loop and a fire potential. This is another reason ground lines are incorporated into the circuit. It acts as a circuit "lightning rod."
The neutral cable is not zero. It is actually an electropotential that is higher than ground but lower than active. The reason that you have it is so that the circuit will work, that the electricity flows in the correct direction when the appliance is on.
If the neutral cable is connected to the active cable, the circuit will still work, but it could be dangerous because the current might not flow the direction that you want. Or it might go back and forth because the electropotentials are not different. You could generate a lot of resistance which builds up heat, cause an arc with electricity jumping an air gap, and start an electrical fire that won't be put out without turning off the appliance. This is why ground is so necessary.
To make a circuit work properly, when the circuit is followed back to the beginning, the electricity must go into the starting point at zero volts. To have anything more is to set up a feedback loop and a fire potential. This is another reason ground lines are incorporated into the circuit. It acts as a circuit "lightning rod."