For alloys the value of temperature coefficient of resistance is very high. (True/False)

For metallic conductors the value of temperature coefficient of resistance is negative. (True/False)

For metallic conductors the value of temperature coefficient of resistance is negative (True/False ).

The unit of temperature co-efficient of resistance is "^@C^-1 .(True/False)

is the value of temperature coefficient of resistance always positive?

Name any one material having a small value of temperature coefficient of resistance. Write one use of this material.