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| 1. |
How will the magnetic field intensity at the centre of a circular coil carrying current change, if the current through the coil is doubled and the radius of the coil is halved ? |
| Answer» SOLUTION :MAGNETIC FIELD at centre of a coil, B `prop (I)/(R)`, whencurrent I is doubled and radius R is halved, the magnetic field becomes four times the original field. | |