Question

The temperature dependence of resistance of $Cu$ and undoped $Si$ in the temperature range $300-400K$ is best described by

• A. linear increase for $Cu$ , exponential decrease for $Si$
• B. linear decrease for $Cu$ , linear decrease for $Si$
• C. linear increase for $Cu$ , linear increase for $Si$
• D. linear increase for $Cu$ , exponential increase for $Si$

Answer 1

Answer: (A)

Resistance variation with temperature: resistance of a metal increases with increase in temperature linearly and resistance of a semiconductor decreases exponentially with increase in temperature.