1.

Shown in the figure below is a meter- bridge set up will null deflection in the galvanometer. The value of the unknown resistor R isA. `110Omega`B. `55Omega`C. `13.75Omega`D. `220Omega`

Answer» Correct Answer - D
For a balanced meter bridge (null deflection).
`(55)/(R )=(20)/(80)`


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