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In the circuit shown in fig. calculate t...

In the circuit shown in fig. calculate the following:
a. Potential difference between points a and b when switch S is open.
b.Current through S in the circuit when it is closed.

Text Solution

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The correct Answer is:
`(i) V_(ab)=-12 V` (ii) `3` amp from `b` to `a`
`(i) I=(36-0)/9=4` Amp.
`V_(s)=36-4xx6`
`V_(s)=12` volt
`V_(b)=36-4xx3`
`V_(b)=24` volt
`V_(a)-V_(b)=-12` volt
`(ii)` Now `6 Omega||3 Omega=2 Omega` so `V_(s)`
`=V_(b)=18 V`
`I=36/4=9` Amp.
Current through switch is `3` amp from `b` to a

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