ICSE Class 10 Physics 2022 Solved Paper

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Section-B
The diagram below shows a magnetic compass kept closer to a coil AB wound around a hollow cylindrical cardboard :
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Question : 12
Total: 45
How did you arrive at the conclusion in (a)?
Solution:  
The diagram shows that the north pole of the magnetic compass is deflected towards geographical south. This is possible only when current flows in the coil of the solenoid and produces a magnetic field around it. Thus the switch S1 is closed.
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