A teacher in his physics laboratory allotted an experiment to determine the resistance (G) of a galvanometer. Students took the observations for ${1 \over 3}$ deflection in the galvanometer. Which of the below is true for measuring value of G?
${1 \over 3}$ deflection method cannot be used for determining the resistance of the galvanometer.
${1 \over 3}$ deflection method can be used and in this case the G equals to twice the value of shunt resistances.
${1 \over 3}$ deflection method can be used and in this case, the G equals to three times the value of shunt resistances.
${1 \over 3}$ deflection method can be used and in this case the G value equals to the shunt resistances.
