state the principle of an electric 75 wards
Answers
Electricity is flow of electricity through a conductor.
Electric current takes form of free electrons that transfer from one atom to other.
More free electrons the better is conduction.
3 primary electrical points are: volt, ampere and ohm.
1. Volt :
Pressure put on free electrons causes them to flow is an electromotive force.
Volt is unit of pressure i.e. volt is amount of electromotive force needed to push current of one ampere through conductor with resistance of one ohm.
2. Ampere :
Ampere explains flow rate of electric current.
When one coulomb flows a given point on conductor in one second it's called as current of one ampere.
3. Ohm :
Ohm is unit of resistance in conductor.
3 things confirm amount of resistance in conductor: size, material i.e. copper/aluminum and temperature.
Its resistance increases when length increases.
Ohm’s Law defines the correlation between electric current (I), voltage (V), and resistance (R) in a conductor.
Ohm’s Law is expressed as: V = I × R
Where: V = volts, I = amps, R = ohms