Physics - Current Electricity Question with Solution | TestHub

A. Color code: Red (2), Green (5), Orange ($10^3$). So, resistance $R=25\times 10^3\Omega =25\text{ k}\Omega$. B. Gold band indicates a tolerance of $\pm 5\%$.

C. Carbon resistors are typically made of carbon composition, which exhibits a negative temperature coefficient of resistance. Thus, its resistance decreases upon heating. D. Maximum resistance = $25\text{ k}\Omega +5\%\text{ of }25\text{ k}\Omega =25+1.25=26.25\text{ k}\Omega$. Minimum resistance = $25\text{ k}\Omega -5\%\text{ of }25\text{ k}\Omega =25-1.25=23.75\text{ k}\Omega$.