Write and explain Ohm's law.

Explanation

`rArr` In 1828, German Scientist George Simon Ohm gave law as per follows :
"In fixed physical condition when current flows through conductor ratio of potential difference (V) between two points of conductor and current (I) flowing in them is constant."
`therefore V prop I `
`therefore ` V = RI where R is called current impedance.
`therefore (V)/(I) = R `
`therefore` R is called resistance. Unit of resistance is `("Volt")/("Amp")`= Ohm. Its symbol is `.Omega.` and its dimensional formula is `M^(1) L^(2) T^(-3) A^(-2)`.