From my observation, most of the students quite difficult to remeber the caolur code of the resistor. Since the resistor is one of basic components to resist the current, i ask my students to make their own mnemonic on colour code just like
"Bad Boys Ravish Only Young Girls But Violet Gives Willingly"
How To Read The Code:
Resistor values are always coded in ohms, capacitors in picofarads (pF), and inductors in microhenries (µH).
band A is first significant figure of component value
band B is the second significant figure
band C is the decimal multiplier
band D if present, indicates tolerance of value in percent (no color means 20%)
For example, a resistor with bands of yellow, violet, red, and gold will have first digit 4 (yellow in table below), second digit 7 (violet), followed by 2 (red) zeros: 4,700 ohms. Gold signifies that the tolerance is ±5%, so the real resistance could lie anywhere between 4,465 and 4,935 ohms.
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