In the following electrical network, the value of ' $\mathrm{I}$ ' is

In the following electrical network, the value of ' $\mathrm{I}$ ' is
  1. 3.4 A
  2. 4.3 A
  3. 5.8 A
  4. 1.9 A

Solution

Current is a scalar quantity. On current accounting: $\begin{aligned} & I_{\text {in }}=1 \mathrm{~A}+2 \mathrm{~A}+3 \mathrm{~A}+0.8 \mathrm{~A}=6.8 \mathrm{~A} \\ & \mathrm{I}_{\text {out }}=0.5 \mathrm{~A}+1.2 \mathrm{~A}+1.7 \mathrm{~A}=3.4 \mathrm{~A} \\ & \mathrm{I}=\mathrm{I}_{\text {in }}-\mathrm{I}_{\text {out }}=3.4 \mathrm{~A} \end{aligned}$ ^

Asked in: MHT CET 2022 (08 Aug Shift 2)

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