Q123 / 125 · BITSAT 2019 · Physics

A carbon resistor of 56±5.6 kΩ is to be marked with rings of different colours for its identification. The colour code sequence will be

  • Correct answer
    A
    green, blue, orange, silver
  • B
    blue, yellow, orange, silver
  • C
    green, red, orange, silver
  • D
    red, green, blue, gold

Solution

Given, R=56±5.6 k Ω

=56 k Ω±10 % of 56 k Ω
=56×103±10 % Ω

As per the colour code for carbon resistors, the colour assigned to numbers

5→ Green
6→ Blue
3→ Orange

For 10 % accuracy or tolerance, the colour is silver. Hence, the bands of colours of carbon resistor in sequence are green, blue, orange and silver.

Hence, the correct answer is option: 'A'.

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