A wire has a resistanceof 2 ohm at 273 K and a resistance of 2.5 ohm at 373 K. What is the temperature coefficient of resistance of the material ?

What is the unit of temperature coefficient of resistance?

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

A silver wire has a resistance of of 2.1 Omega at 27..5^@C and a resistance of 2.7 Omega at 100^@C . Find out the temperature coefficient of resistivity of silver.

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

The resistance of a copper wire at 20^@C is 3 Omega and at 100^@ is 3.94 Omega .Determine the temperature coefficient of resistance of copper.

Of metals and alloys,which has greater value of temperature coefficient of resistance?

A wire has a resistance of 16 Omega . It is melted and drawn into a wire of half its length. What is the percentage change in its resistance?

The resistance of the conductor at O^@ C IS 1 ohm. Find the resistance at 100^@ C . Temperature coefficient of resistance is 0.004//0^@ C .

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)l 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 resistance of a metal wire increases by 10% when its temperature rises from 10^@C to 110^@C .The temperature coefficient of resistance of the metal is

A coil of wire is kept in melting ice . Its resistance measured by a Wheatstone bridge is 5Omega . If the coil is heated to 100^(@)C and another wire of resistance 100Omega is coonnected in parallel to it , the balanced condition of the brige remains unchaged . Determine the temperature coefficient of resistance of the wire of the coil .