TS EAMCET 5 May 2018 Shift 2 Solved Paper

A cylindrical shape resistance is connected to a battery withemf 5V. The resistance per unit length varies as ρ(x)=ρ0(

x

L

)αwhere ρ0 and α are constants and x is the distance from oneend of the resistor. The magnitude or product ρ0L is 10Ω,where L is the length of the resistor. If the thermal power generated by the resistor is by the resistor is 20W, then the value of α is