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Chapter 4: Q7DQ (page 872)

A battery with no internal resistance is connected across identical light bulbs as shown in Fig. Q 26.7. When you close the switch S, will the brightness of bulbs B1 andB2 change? If so, how will it change? Explain.

Short Answer

Expert verified

Brightness will be the same forB1 and B2.

Step by step solution

01

Step 1: Definition of parallel connection

In a parallel circuit, all components are connected parallelly, connected all the first and last ends together in an electrical circuit. Voltage drop across all the components is same.

02

Determining the brightness of each bulb connected

The three bulbs are in parallel, therefore, the same voltage is across each bulb. And when is closed, no change in the voltage acrossB1 and B2. Therefore, the two bulbs will have the same brightness.

Thus, Brightness will be the same forB1 and B2.

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