A semiconductor has ………… temperature coefficient of resistance.Select one:a. Negativeb. Zeroc. Infinited. Positive

To answer the question regarding the temperature coefficient of resistance in semiconductors, let’s analyze the options provided:

1. Understanding Temperature Coefficient of Resistance:

   • The temperature coefficient of resistance indicates how the resistance of a material changes with temperature.

2. Behavior of Semiconductors:

   • In semiconductors, as the temperature increases, the number of charge carriers also increases, which results in a decrease in resistance. Hence, they exhibit a negative temperature coefficient of resistance.

3. Analyzing the Options:

   • a. Negative: Correct, as explained above, semiconductors typically have a negative temperature coefficient.
   • b. Zero: This would imply no change in resistance due to temperature changes, which is not applicable to semiconductors.
   • c. Infinite: There is no scenario where resistance changes infinitely with temperature; this option is not relevant.
   • d. Positive: A positive temperature coefficient implies resistance increases with temperature, which is characteristic of metals, not semiconductors.

Final Answer

The correct choice is a. Negative.