A circular coil having mass m is kept above ground (x-z plane) at some height. The coil carries a current i in the direction shown in Fig. In which direction a uniform magnetic field be applied so that the magnetic force balances the weight of the coil?
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a
Positive x-direction
b
Negative x-direction
c
Positive z-direction
d
None of these
answer is D.
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Detailed Solution
Net force on a current carrying loop in a magnetic field is not zero hence it cant balance the weight.