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The graph of current versus voltage drop...

The graph of current versus voltage drop across the three resistors P,Q,R is shown above. Find the ratio of their resistances.

Text Solution

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(i) We know, Ohm's law is `V = iR`.
From graph, get the values of voltage and cor-responding current For `P, Q` and resistors. ltbRrgt `R_(P) = (V_(R))/(i_(R))`
`R_(Q) = (V_(Q))/(t_(Q))`
`R_(R) = (V_(R))/(i_(R))`
Find the ratio of `R_(P) : R_(Q) : R_(R)`
(ii) `R_(P) : R_(Q) : R_(R) = 20 : 15 : (20)/(3)` (or) `12 :9 : 4`
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