The temperature coefficient of resistance of a semiconductor

The temperature coefficient of resistance of a semi conductor is

The resistance R of a conducting wire depends on its material , length l and area of cross section A. The resistivity of the material of the wire is rho=(RA)/t the value of rho is for different materials .It is very low for conducting materials like metals,Besides, the resistance of a conductor also depends on its temperature. IF the resistance of a conductor is R_0 at 0^@C and R_1 at t^@C , then R_1=R_0(1+at) where a is called the temperature coefficient of resistance. The resistance increases with temperature for metallic conductors but decreases for graphite,a few metal alloys,and for semiconductors like silicon and germanium. The temperature coefficient of resistance of a semiconductor is

What is the nature of temperature coefficient of resistance of a semiconductor?

The temperature coefficient of resistance of a conductor is

The temperature coefficient of resistivity of semiconductors is :

The temperature coefficient of resistance of conductors is

Define temperature coefficient of resistance of a conductor. Give the expression for temperature coefficient.

Fill in the blank spaces with appropriate answers : The temperature coefficient of resistance is………for semiconductors.

the temoperature -coefficient of resistivity of semiconductors is