Lessons

Eamcet Physics
2 nd Year : Unit 3.2 ( Magnetic Effects of Current And Magnetism ) - Electro Magnetism

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Q.

Two circular coils of radii 20cm and 30 cm having number of turns 50 and 100 made of same material are connected in series. The ratio of the magnetic field of induction at their centre is

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Correct choice: A

Explanation:

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