Boojho made the circuit given in Fig. and observed that the bulb did not glow. On Paheli’s suggestion, he added one more cell in the circuit. The bulb now glows. Explain.
Fig. \( 14.3 \)
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Solution
When Boojho observed the light bulb initially did not light because one of the cells could not produce enough voltage to power the lightbulb.
When a second cell is connected to the circuit, the voltage across the circuit doubles, which allows the current to increase.
When second cell is connected, the voltage across the circuit will be greater than the circuit with one cell.
These two cells causes current, which causes the filament of the lightbulb to get hot enough for the lightbulb to glow.
