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shows three resistances are connected ...

shows three resistances are
connected with switch S initially the switch is open. When
the switch S is closed find the current passed through it.

Text Solution

Verified by Experts

Let V be the potential of the junction as shwn in fig.5.66(b).


Applying junction law, we have
`(20 -V)/(2) + (5-V)/(4) = (V-0)/(2)`
or `40 - 2V +5 -V =2V or 5V =45` or `V =9V`
`:. i_3 = (V)/(2) = 4.5A`
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