Answer :

Initially the bulb was not glowing because one cell was not able to provide sufficient voltage to cause the current to glow the bulb.


When one more cell is added in the circuit the voltage across the circuit doubles and it becomes sufficient to increase the current. This current heat the filament of bulb sufficiently and bulb glows.



Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses
RELATED QUESTIONS :

Observing that thNCERT - Science Exemplar

You are provided NCERT - Science Exemplar

Boojho made the cNCERT - Science Exemplar

In the circuit giNCERT - Science Exemplar

Paheli wants to dNCERT - Science Exemplar

Observe Fig. 14.5NCERT - Science Exemplar

Boojho and PaheliNCERT - Science Exemplar

Which of the follNCERT - Science Exemplar

Which one of the NCERT - Science Exemplar

Boojho’s uncle haNCERT - Science Exemplar