ICSE Class 10 Physics 2020 Solved Paper

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The diagram below shows a loop of wire carrying current I :
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Question : 26
Total: 67
With respect to the diagram how can we increase the strength of the magnetic field produced by this loop?
Solution:  
The strength of the magnetic field produced by this loop can be increased by increasing the strength of current in the loop (This can be done by decreasing the resistance of variable resistor i.e., rheostat).
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