The idea is that the magnetic field of the device reacts with the external magnetic field. If the current is reversed, the magnetic field would also be reversed, and the reading would be the opposite.
No changes will occur by wiring a 110 volt motor in reverse polarity, rotation will always be the same. Some single phase motors are designed to be reversed ,but that is a function of the relationship of start windings and capacitors and requires some wiring changes in a motor junction box or an end terminal housing, not by just changing the incoming power.
as direction of current reverses it is shown in form of positive and negative cycles
magnetic flux will be induced its use to rotate the shaft or given some force
If a diode breaks down in the reverse direction then, providing there is current-limiting resistance, nothing will happen to the diode. If there is no such current-limiting resistance the diode will be destroyed. Heat is the only enemy of a semiconductor of this type.
If you mean what would happen if you connected a DC device backwards, there could be one or two things happen depending on that the device is. If it was a DC motor it would operate in the opposite direction. If it was an electronic device it could burn out some components. Or with today's electronics nothing would happen. Up until a few years ago polarity to electronic devices was crucial that it be connected correctly. In today's electronics a bypass diode is inserted into the voltage supply line that will block the current flow if the connection is reversed. This one little addition to the circuit supply has saved the frying of many electronic components.
In that case, the magnetic field will also be reversed.
Then the resultant vector is reversed.
If you change the direction of current in an electromagnet, (which by the way is just a coil of wire) then the direction of the magnetic field will also be reversed: That is to say, what was north is now south. If you want more info. look up "the left hand rule".
velocity can happen
Nothing just that it does not move to that direction
No changes will occur by wiring a 110 volt motor in reverse polarity, rotation will always be the same. Some single phase motors are designed to be reversed ,but that is a function of the relationship of start windings and capacitors and requires some wiring changes in a motor junction box or an end terminal housing, not by just changing the incoming power.
When reverse the direction of a seperately excited DC generator,only polarities has been reversed,i.e., (+) becomes (-) and (-) become (+).
Direction of the magnetic lines too would get changed
it will work as a rectifier . because the AC current to be rectified will not be effected by this change. the out put DC polarity will be changed.
If dc current is passed through a single coil, it is going to remain constant.
when electric current is passed through acidified water hydrogen gas is released at the cathode..
It will get hot.