Two tangent galvanometers A and B have coils of radii 8 cm and 16 cm respectively and resistances 8 Ω each. They are connected in parallel with a cell of emf 4 V and negligible internal resistance. The deflections produced in the tangent galvanometer A and B are 30∘ and 60∘ respectively. If A has two turns then B must have .

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

1.	Two tangent galvanometers A and B have coils of radii 8 cm and 16 cm respectively and resistances 8 Ω each. They are connected in parallel with a cell of emf 4 V and negligible internal resistance. The deflections produced in the tangent galvanometer A and B are 30∘ and 60∘ respectively. If A has two turns then B must have .
Answer» Two tangent galvanometers $A$ and $B$ have coils of radii $8 cm$ and $16 cm$ respectively and resistances $8 Ω$ each. They are connected in parallel with a cell of $emf 4 V$ and negligible internal resistance. The deflections produced in the tangent galvanometer $A$ and $B$ are $30^{\circ}$ and $60^{\circ}$ respectively. If $A$ has two turns then $B$ must have .

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