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If 2x% be the percentage error in specif...

If `2x%` be the percentage error in specific resistance given by `rho=(pir^(2)R)/(l)` where r is the radius having value `(0.2 om 0.01)` cm, R is the resistance of `(60 pm 3)` ohm and `l` is the length of `(150 pm 1.5)` cm. Find x.

Text Solution

Verified by Experts

The correct Answer is:
8
`(Delta rho)/rho%=(2 Delta r)/r%+(Delta R)/R%+(Deltal)/l%`
`=[2xx0.01/0.2+3/60+1.5/50]xx100`
`=[0.1+0.05+0.01]xx100`
`=16%`
`:." "x=8`
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