Question

Which of the following is true for carbon resistors?

• A. Resistance value does not get changed by change in temperature
• B. Current carrying capacity and hence power wattage are limited to about $50$ Watts.
• C. It has low-temperature coefficient value.
• D. Stability and reliability are very good.

Answer 1

The correct option is C It has low-temperature coefficient value.

$A\to$ Resistance value of carbon resistor with change in temperature it has negative thermal coefficient.

$B\to$ Carbon resistors are not current carrying capacitor.

$C\to$ Carbon has low temperature coefficient value i.e. higher the temperature, lower the resistivity.

$D\to$ Because of low stability of resistance value this type of resistors are not suitable.