JEE Main20198 Apr 2019Morning ShiftPhysicsCurrent ElectricityActual
A 200 Ω resistor has certain colour code. If one replaced the red colour by green in the code, the new resistance will be:
Options
- A300 Ω
- B100 Ω
- C400 Ω
- D500 Ω
Correct answer
D. 500 Ω
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. As we know red corresponds to digit 2 and green corresponds to digit   5 , new resistance will be 500   Ω