Study the circuit diagram. If Bulb B2 fuses, which other bulbs will also go out?
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Worked Solution
Step 1: Identify the circuit arrangement. B2 and B3 are in series with each other on one branch.
Step [2-9]: B1 is on a parallel branch.
Step [2-9]: If B2 fuses, the branch containing B2 and B3 becomes an open circuit. B3 goes out, but B1 stays lit.
Correct answer: Only B3
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