When bulb D is added, 1. the current through battery _____________. (Options: in

Question

When bulb D is added,

1. the current through battery _____________. (Options: increases, decreases, stays the same). Why? Explain the reasoning

2. the brightness of bulb A _____________. (Options: increases, decreases, stays the same). Why? Explain the reasoning

3. the brightness of bulb B or C (Options: increases, decreases, stays the same). Why? Explain the reasoning

Please choose one of the options and explain the reasoning you used to answer the previous questions.

Explanation / Answer

1) increases
explanation : net resistance of the circuit decreases.
so current in the ckt increases.
2) increases

explanation : as the current increases brightness also increases.

3)
decreases

explanation : potential drop across BCD bulbs decreases.

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