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Find x if P is a null point ?...


Find x if P is a null point ?

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First analysing the main circuit ,
`90-10i_(1)-20i_(1)=0`
`i_(1)=3 A`.
Potential gradient `=(60V)/(10m)=6V//m`

Now analysing the auxillary circuit
`20-2i_(2)-2i_(2)=0`
`i_(2)=5A`.
For `10V_(e)rArr(10)/(6)=(5)/(3)m`
`thereforex=10-(5)/(3)=(25)/(3)m`
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