[填空题]
A tungsten filament used in a flash7 rhozmb8x*2 ylight bulb operates a6kaaa4 dm5y0z8g7tvxt 0.20 A and 3.2 V. If its resistance at m54 7v6za0xat8ykgd a20$^{\circ}\,C$ is $1.5\Omega$ what is the temperature of the filament when the flashlight is on? $^{\circ}\,C$
