Q 12-03-260JEE MainJEE Main 2019 (8 Apr, Shift 1)Easy
A $200\ \Omega$ resistor has certain colour code. If one replaces the red colour by green in the code, the new resistance will be
Answer: (D) $500\ \Omega$
$200\ \Omega = 20\times10^1$: bands red (2), black (0), brown ($\times10$). Replacing red by green (5) gives $50\times10 = 500\ \Omega$.
Solution by Sreeraj P, M.Sc Physics