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If we use 100 Omega and 200 Omega in pla...

If we use `100 Omega` and `200 Omega` in place of `R` and `X` we get null point deflection.`l=33cm`. If we interchange the resistors, the null point length is found to be `67 cm`. Find end corrections `alpha` and `beta`.

A

`alpha = 1cmbeta = 1cm`

B

`alpha = 2cm, beta =1cm`

C

`alpha = 1cm beta = 2cm`

D

None of these

Text Solution

Verified by Experts

`alpha=(R_(2)l_(1)-R_(1)l_(2))/(R_(1)-R_(2))=((200)(33)-(100)(67))/(100-200)=1cm`
`beta = (R_(1)l_(1)-R_(2)l_(2))/(R_(1)-R_(2))-100=((33)(100)-(200)(67))/(100-200)100=1cm` .
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