A filament has a resistance of 0.10 $\Omega$at 20°C. If the resistance becomes 0.14 $\Omega$when the temperature of the filament increases to 90°C, the temperature coefficient of resistance for this material is A) 5.7 *10^-3/°C. B) 5.7 * 10^-4/°C. C) 4.4 * 10^-3/°C. D) 4.4 * 10^-4/°C.

Question

Quizplus · Accepted Answer

The temperature coefficient of resistance ($\alpha$) is calculated using the formula $\alpha = \frac{R_2 - R_1}{R_1 \times (T_2 - T_1)}$. Substituting the given values: $\alpha = \frac{0.14 - 0.10}{0.10 \times (90 - 20)} = 5.7 \times 10^{-3}/°C$.

A Filament Has a Resistance of 0 Ω\OmegaΩ At 20°C If the Resistance Becomes 0

A Filament Has a Resistance of 0 $\Omega$ At 20°C If the Resistance Becomes 0