Why is phosphor bronze alloy preferred for the suspension wire of a moving coil galvanometer?
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The wire used for the suspension of the coil in the moving coil galvanometer is made up of phosphor -bronze because their constant value k is quite less and on which restoring torque depends .
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The phosphor bronze alloy is used for the suspension wire of a moving coil galvanometer bcoz of the following properties 1 small restoring torque per unit twist This makes galvanometer highly sensitive 2 High tensile strength so that even thin fibre does not break under the weight of the suspended coil 3 Rust resisting
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