Basic Electricity
Electricity - We cannot see it, but we can sense its effects like heating, chemical, magnetic etc.
Electric Current - The flow of electrons is called current. The unit of current is Ampere and measured by ammeter. It is denoted by ‘I’.
Voltage - Voltage can be defined as the difference of potential between two points of a circuit. One volt is the electric pressure which allows flow of one ampere of current against one ohm resistance. It is measured by voltmeter. Unit of voltage /potential difference is Volt. It is denoted by ‘V’.
Direct current - The current which does not change its direction and magnitude all the time is called direct current.
Alternate current -The current which alternate its direction and magnitude with respect to time is called Alternating current.
