1.

In calculating resistance of a galvanometer by half deflection method a student takes only one third of deflection of galvanometer. Which of the following will occur because of this?(a) We can't calculate the value of resistance of galvanometer by this method(b) We will get 1/3 times the value of resistance(c) We will get 3 times the value of resistance.

Answer»

(a) We can't calculate the value of resistance of galvanometer by this method

Resistance from half deflection method in given by

R= RS/R-S

if we do 1/3rd of deflection then Rg = 2 RS/R-2S

which is not related of actual resistance of galvanometer.



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