Two circular coils made of similar wires but of radius 20 cm and 40 cm are connected in parallel. The ratio of magnetic fields at their centre is-
Text Solution
Verified by ExpertsThe correct answer is:
A
When the coils are connected in parallel, the ratio of currents flowing in these coils will be equal to reciprocal of the ratio of their resistances,
(as both the coils are made of similar wires)
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