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In the circuit shown in figure the readi...

In the circuit shown in figure the reading of ammeter is the same with both switches open as with both closed. Then find the resistance `R`. (ammeter is ideal).

Text Solution

Verified by Experts

The correct Answer is:
`600 Omega`

`I=1.5/450=1/300` Amp...(1)
When both switch are closed
`I_(100 Omega)=1.5/((100 R)/(100+R)+300)xxR/(100+R)....(2)`
from `(1)` and `(2)`

`6 600 Omega`
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