0Current always flows in opposite direction of electrons ( electrons thats is -ve charged flows through negative terminal of battery/power supply to positive terminal thus) current flows +ve terminal to -ve terminal.
"current is rate of flow of electrons or electric charge"
unit- Ampere (remember those unit which are related to any scientist name their first letter should be written in capital)
I= Q/t (I = current (Ampere), Q = charge (Coloumb), t= time (second) )
Facts-
1. Current always flows to a complete circuit i.e. if the circuit breaks or incomplete the current will not flow
2. mechanism of current flow - when we put power supply i.e. battery or AC voltage first the electrons flows when the electron complete the cycle i.e. when it reached -ve terminal to +ve terminat only then the current begin to flow. (and that is the reason why current not flows in incomplete circuit because electron is not reached to +ve terminal)
3. When we increase the voltage the current may increase but we can't increase the voltage by increasing the current (that related to OHM's law see on next article).
4. we can apply resistors to change the amount of electricity flow in circuit. To understand we can state resistor are barrier which resist/block the current by some amount.
5. Current flows always on those material which have have free electrons (to move) i.e conductors and generally metal are good conductor.
free electrons are those electron which are independent to move in a material genenarlly in metals the electrons in outer most orbit freed to complete the octat so this is clear and the reason why current flows in metal only because metal have more free eelctrons/ charge carrier rather than non metal (so there will no current flow in non mental due to it has no free electron to propogate and if there is no charge....so no flow of charge so no current).
CONDUCTOR- Conductor are those material who can conduct the electric/ current, heat etc.
NON CONDUCTOR- Those material who can not counduct the electric, heat etc.
METAL- Those element which have free electron or can produce free electrons.
CONDUCTIVITY- It is property of material which define capibility/quality of current flow. If it state the conductiity of any material is high it means there should low resistance in material and maximum current flow.
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