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If 400 Omega of resistance is made by ad...

If `400 Omega` of resistance is made by adding four `100 Omega` resistance of tolerance `5%`, then the tolerance of the combinations

A

`5%`

B

`10%`

C

`15%`

D

`20%`

Text Solution

Verified by Experts

`R_(eq)=4R`
`lnR_(eq)=ln4R = ln4+lnR`
`(dR_(eq))/(R_(eq))\=(dR)/(R)=5%`
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