Q. 39 An incandescent lamp is marked 40 W, 240 V. If resistance at room temperature
, and temperature coefficient of resistance is
then
its ‘ON’ state filament temperature in 
is approximately_____.
Answer:(
)
Explanation:
Q. 39 An incandescent lamp is marked 40 W, 240 V. If resistance at room temperature
, and temperature coefficient of resistance is then
its ‘ON’ state filament temperature in is approximately_____.
Answer:()
Explanation:
