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Resistor Colour Code - Practice Questions & MCQ
Edited By admin | Updated on Sep 18, 2023 18:34 AM | #JEE Main
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11 Questions around this concept.
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The Wheatstone bridge shown in the figure here gets balanced when the carbon resistor used as $\mathrm{R}_1$ has the colour code (Orange, Red, Brown) The resistors $R_2$ and $R_4$ are $80 \Omega$ and $40 \Omega$, respectively. Assuming that the colour code for the carbon resistors gives their accurate values, the colour code for the carbon resistor, used as $\mathrm{R}_3$, would be :
Concepts Covered - 1
Colour coding of Resistance
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Colour coding of Resistance
The carbon resistance has normally four coloured rings bands $A, B, C$ and $D$.
Colour bands A and B Indicates the decimal figure.
Colour band C Indicates the decimal multiplier.
Colour band D Indicates the tolerance in per cent about the indicated value. Tolerance represents the percentage accuracy of the indicated value.
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To remember the sequence of colour code
B B ROY Great Britain Very Good Wife
Tolerance of Gold is $\pm 5 \%$
Tolerance of Silver is $\pm 10 \%$
Tolerance if no colour $\pm 20 \%$
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