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  • If the galvanometer G does not show any deflection in the circuit shown, the value of R is given by : <img alt="" src="https://cdn.entrance360.com/media/uploads/2023/05/09/ph-1.jpg" style

If the galvanometer G does not show any deflection in the circuit shown, the value of R is given by :

 

Option: 1

200\, \Omega


Option: 2

50\, \Omega


Option: 3

100\, \Omega


Option: 4

400\, \Omega


Answers (1)

best_answer

potential difference across r is given by

\begin{aligned} & i R=V \\ & \begin{aligned} \frac{10}{400+R} \times R=2 & \Rightarrow 5 R=400+R \\ & \Rightarrow 4 R=400 \\ & \Rightarrow R=100 \Omega \end{aligned} \end{aligned}

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Rishi

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