The colour sequence in a carbon resistor is red, brown, orange and silver. The resistance of the resistor is
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(a) Red, brown, orange, silver red and brown represents the first two significant figures. $R$ = $21 \times {10^3} \pm 10\% $
| significant figures | Multiplier | Tolerance |
| Red Brown | Orange | Silver |
| $2$ $1$ | $10$ | $\pm 10\%$ |
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