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The graph showing the variation of the magnetic field strength (B) with distance (r) from a long current carrying conductor is
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Important Questions on Magnetic Effect of Current
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IMPORTANT
A certain length of insulated wire can be bent to form either a single circular loop (case I) or a double loop of smaller radius (case II). When the same steady current is passed through the wire, the ratio of the magnetic field at the centre in case I to that in case II is
