Two conducting circular coils have radii of 5c.m and 10 c.m respectively. The coil having radius 5c.m has 50 number of turns and carries a current of 2 amperes. The other one has 100 number of turns and carries a current of 0.5 ampere
The ratio of magnetic field produced by the first coil at its centre to that produced by second one at in centre is
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