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JEE Main20199 Jan 2019Evening ShiftPhysicsCurrent ElectricityActual

A carbon resistance has a following colour code. What is the value of the resistance?

Options

  1. A6.4 M Ω ± 5 %
  2. B64 k Ω ± 10 %
  3. C530 k Ω ± 5 %
  4. D5.3 M Ω ± 5 %

Correct answer

C. 530 k Ω ± 5 %

Step-by-step solution

Colour band A and B indicate the first two significant figures of resistance in "ohm" , while the C band gives the decimal multiplier i.e., the number of zeros that follows the two significant figures A and B . The last band D indicates the tolerance in percentage about the indicate value or in another word, it represents the percentage accuracy of the indicated value. According to given color-coding, the values of the color of rings are Green 5 Orange 3 Yellow 4 Gold 5 % Value of resistance = 53 × 10 4 Ω

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