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Practical diagram for meter bridge is as shown in figure. (a) G deflects zero, when `l_(1)=20cm` and `R=100Omega` then find X. (b) If R and X are interchanged then find `l_(1)` for zero deflection. |
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Answer» (a) `l_(1)=20cm, l_(2)=100-l_(1)=100-20=80cm,R=100Omega` `(P)/(Q)=(R)/(S)rArr(l_(1))/(l_(2))=(R)/(X)rArr(20)/(80)=(100)/(X)rArrX=400Omega` (b) `(l_(1))/(100-l_(1))=(X)/(R)=(400)/(100)rArrl_(1)=80cm` or R and X interchane then `l_(1),l_(2)` interchanged. |
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