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Question:

A 200Ω resistor has a certain color code. If one replaces the red color by green in the code, the new resistance will be?

400Ω

100Ω

500Ω

300Ω

Solution:

Correct option is C. 500Ω
When red is replaced with green 1st digit changes to 5 no new resistance will be 500Ω.