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Two tangent galvanometers A and B have coils of radii 8 cm and 16 cm respectively

Two tangent galvanometers A and B have coils of radii 8 cm and 16 cm respectively and resistance 8 Ω each.They are connected in parallel with a cell of emf 4 V and negligible internal resistance. The deflections produced in the T.G’s A and B are 30⁰ and 60⁰ respectively. If A has 2 turns, then B must have

Options

(a) 18 turns
(b) 12 turns
(c) 6 turns
(d) 2 turns

Correct Answer:

12 turns

Explanation:

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