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Find the current in the circuit...

Find the current in the circuit

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`:.` all the elements are connected in series
cirrent is all of them will be same
let current = i
Applying kirchoff coltage law is ABCDA loop
`10i+4i-20+i+15+2i-30+3i=0`
`10 i=25`
`i=2.5` A
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