At which point is the magnetic field stronger in a current carrying loop: at the centre or at a point near the circumference. Why?

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Solution

Magnetic Field is the strongest at its centre of the current carrying loop. Since, the magnetic field lines go in same direction and thus their strength adds up. As we go away from the wire, the strength of the magnetic field decreases, and the concentric circles grow larger in size. Further,the strength of the magnetic field at the centre of a circular coil carrying current is proportional to the number of turns in the coil (n). As we increase the turns, the magnetic field strength also increases.

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