1
Question
A 50W bulb connected in series with a heater coil is put to an AC mains. Now the bulb is replaced by a 100W bulb. The heater output will
A 50W bulb connected in series with a heater coil is put to an AC mains. Now the bulb is replaced by a 100W bulb. The heater output will
Open in App
Solution
The correct option is C Increase
Resistance of 100 watts bulb is less than 50 watts bulb. When 50 watts bulb is replaced by 100 watts bulb, connection in series with heater, the resistance of circuit decreases and hence current increases. As heat is directly proportional to the square of current , therefore heater will now give more heat
Resistance of 100 watts bulb is less than 50 watts bulb. When 50 watts bulb is replaced by 100 watts bulb, connection in series with heater, the resistance of circuit decreases and hence current increases. As heat is directly proportional to the square of current , therefore heater will now give more heat
Suggest Corrections
0
Similar questions
View More
Join BYJU'S Learning Program
Explore more
Join BYJU'S Learning Program
