A resistor is a device that opposes the flow of electrical current. The bigger the value of a resistor the more it opposes the current flow. The value of a resistor is given in ohms and is often referred to as its ‘resistance’.
Identifying Resistor Values
|Band Colour||1st Band||2nd Band||Multiplier x||Tolerance|
|Example: Band 1 = Red, Band 2 = Violet, Band 3 = Orange, Band 4 = Gold||Too many zeros?|
|The value of this resistor would be:||kilo ohms and mega|
|2 (Red) 7 (Violet) x1,000 (Orange)||= 27 x 1,000||ohms can be used:|
|= 27,000 with a 5% tolerance (gold)||1,000 ohms =1k|
|= 27k ohms||1,000k = 1M