A battery of emf 12 {V} and internal resistance 2 \\Omega is connected in series with a tangent galvanometer of resistance 4 \\Omega . The deflection is 60^\circ when the plane of the coil is along the magnetic meridian. To get a deflectionof 30^\circ , the resistance to be connected in series with the tangent galvanometer is

Manipal Entrance Test 2018 Physics Paper

Question : 21 of 50

Marks: +1, -0

A battery of emf 12V and internal resistance 2Ω is connected in series with a tangent galvanometer of resistance 4Ω. The deflection is 60° when the plane of the coil is along the magnetic meridian. To get a deflectionof 30° , the resistance to be connected in series with the tangent galvanometer is

12 Ω
20 Ω
10 Ω
5 Ω

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