[填空题]
A tungsten filament u)cuud/yvo/ m/sed in a flashlight q jlqi.-r+:z bbulb operates at 0.20 A and 3.2 V. If its rezbq+ri. q:jl-sistance at 20$^{\circ}\,C$ is $1.5\Omega$ what is the temperature of the filament when the flashlight is on? $^{\circ}\,C$
