When two ends of a circular uniform wire are joined to the terminals of a battery, the field at the center of the circle
A. will be zero
B. will be infinite
C. will depend on the amount of e.m.f. applied
D. will depend on the radius of the circle
Answer: Option D
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question is wrong or information is less option C also could be the answer if thinking about magnetic field. changing emf current will change so magnetic field will changed.