Ohm’s law and measurement (FORMULAS CAN BE FOUND HERE)

Ohm's Law

One of the most fundamental and important laws governing electrical and electronic circuits.

Ohm's Law

This law relates current, voltage, and resistance for a linear device, such that if two are known, the third can be calculated.

Voltage; Current; Resistance

Ohm's Law links three basic electrical parameters; (3)

I

Symbol of Current

Ampere

Unit of Current

A

Symbol of Ampere

E or V

Symbol of Voltage

Volt

Unit of Voltage

V

Symbol of Volt

R

Symbol of Resistance

Ohm

Unit of Resistance

horseshoe

Unit of Ohm

I * R

Formula of V

V/R

Formula of I

V/I

Formula of R

Okay

NOTE!!!!! To remember the formula for V, I, and R at ease, draw a triangle formula; V at top, I at left, R at Right.

Watt

This is a measure of the rate of energy transfer over a unit of time

one joule

One watt is equal to how many joules?

V * C

Formula of Power

P/C

Formula of Voltage

P/V

Formula of Current

Okay

NOTE!!!!! To remember the formula for P, V, and C at ease, draw a triangle formula and put P at the top and V and C beside each other; it does not matter!!!