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(a) State Bio-Savart's law in vector form expressing the magnetic field due to an element vecdl carrying current I at a distance r from the element. (b) Write the expression for the magnitude of the magnetic field at the centre of a circular loop of radius 'R' carrying a steady current I. Draw the field lines due to the current loop. |
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Answer» SOLUTION :(b) The magnitude of magnetic field is GIVEN as `B = (mu_0 I)/(2R)` Field lines have been DRAWN in fig. |
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