Electricity MCQ Class 10 Question 14. The resistance of hot filament of the bulb is about 10 times the cold resistance. What will be the resistance of 100 W-220 V lamp, when not in use?
A. 48 Ω
B. 400 Ω
C. 484 Ω
D. 48.4 Ω
Answer:C
Electricity MCQ Class 10 Question 14. The resistance of hot filament of the bulb is about 10 times the cold resistance. What will be the resistance of 100 W-220 V lamp, when not in use?
A. 48 Ω B. 400 Ω C. 484 Ω D. 48.4 Ω