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Spandan Pradeep Pathare from Takshila school , Ahmednagar
Subject :NSO    Class : Class 7

Which coil will make the strongest electromagnet for a given flow of current?

AA 10 cm coil with 100 turns.
BA 5 cm coil with 200 turns.
CA 10 cm coil with 200 turns.
DA 20 cm coil with 200 turns.


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