1.

When a galvanometer is shunted with a 4Omega resistance, the deflection is reduced to 1//5. If the galvanometer is further shounted with a 2Omega wire, the new deflection will be (assuming the main current remains the same)

Answer»

`5//13` of the DEFLECTION when shunted with `4OMEGA` only
`8//13` of the deflection when shuntedwith `4Omega`only
`3//4` of the deflection when shunted with `4Omega` only
`3//13` of the deflection when shunted with `4Omega`only

Solution :a. When only `4 OMEGA` RESISTANCE is shunted `i_g = i//5`
`G xx i//5 = 4 xx (4//5) or G = 16 Omega`


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