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Two circular coils made from same wire but radius of 1st coil is twice that of 2nd coil. If magnetic field at their centres is same then ratio of potential difference applied across them is ($1^{st}$ to 2nd coil)
Two circular coils made from same wire but radius of 1st coil is twice that of 2nd coil. If magnetic field at their centres is same then ratio of potential difference applied across them is ($1^{st}$ to 2nd coil)
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Physics Tip : When you double the radius of a coil, you need twice the current to keep the magnetic field constant, and you also have twice the resistance because the wire is twice as long.
Updated On: Apr 23, 2026
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The Correct Option is C
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