Knockout JEE Main April 2021 (One Month)
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A moving coil galvanometer has a coil with turns and area
. It uses a torsion band of torsion constant
. The coil is placed in a magnetic field B parallel to its plane . The coil deflects by
for a current of
. The value of B ( in Tesla ) is approximately :
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Given
Option 1)
Option 2)
Option 3)
Option 4)