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What is the value of current I in given ...

What is the value of current `I` in given circuits
(a)

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(a) `I=(27-0.7)/(1 xx 10^(3))=2 mA`
(b) `I=(20)/(10+10)=1 A`
(c) `I=(18-6)/(500)=24 mA`.
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ALLEN -SEMICONDUCTORS-Part-3(Exercise-4)
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