JEE MAIN - Physics (2022 - 25th June Morning Shift - No. 18)
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.
Explanation
The circuit for the given situation is:
_25th_June_Morning_Shift_en_18_1.png)
Since G and S are in parallel,
$$\Rightarrow$$ $${i \over 3}$$ $$\times$$ G = $${2i \over 3}$$ $$\times$$ S
$$\Rightarrow$$ G = 2S
$$\Rightarrow$$ G equals twice the value of shunt resistance.
Comments (0)
