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JEE Main201910 Jan 2019Morning ShiftPhysicsCurrent ElectricityActual

A 2 W carbon resistor is color coded with green, black, red and silver respectively. The maximum current which can be passed through this resistor is:

Options

  1. A100 m A
  2. B0.4 m A
  3. C20 m A
  4. D63 m A

Correct answer

C. 20 m A

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 ward it represents the percentage accuracy of the indicated value. According to given color-coding, the values of colors are Green → 5 , Black → 0 Red → 10 2 Silver → 10 % tolerance so, resist

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