Question 216: Current Electricity

Question

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?

Accepted Answer

The circuit for the given situation is:
Since G and S are in parallel,
$$\Rightarrow$$ $${i \over 3}$$ $$	imes$$ G = $${2i \over 3}$$ $$	imes$$ S
$$\Rightarrow$$ G = 2S
$$\Rightarrow$$ G equals twice the value of shunt resistance.

Answer

$${1 \over 3}$$ deflection method cannot be used for determining the resistance of the galvanometer.

Answer

$${1 \over 3}$$ deflection method can be used and in this case the G equals to twice the value of shunt resistances.

Answer

$${1 \over 3}$$ deflection method can be used and in this case, the G equals to three times the value of shunt resistances.

Answer

$${1 \over 3}$$ deflection method can be used and in this case the G value equals to the shunt resistances.

Current Electricity

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?

Choose the correct answer: