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in Physics by (91.2k points)
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In post office box experiment `Q/P=1/10.` In `R` if 142 `Omega` is used then we get deflection towards righ and if `R=143 Omega`, then deflection is towards left. What is the range of unknown resistance?

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by (93.6k points)
 
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Correct Answer - A::B::C::D
`P/Q=R/Ximplies X=(Q/P)R=(1/10)R`
`R` lies between `142Omega and 143 Omega`
therefore, the unknown resistance `X` lies between `14.2 Omega and 14.3 Omega`

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