Question 517: Current Electricity

Question

The figure shows currents in a part of electric circuit. Then current I is

Accepted Answer

According to Kirchhoff's first law,
At junction $\mathrm{A}, \mathrm{I}_{\mathrm{A}}=1+4=5 \mathrm{~A}$
At junction $\mathrm{B}, \mathrm{I}_{\mathrm{A}}=\mathrm{I}_{\mathrm{BC}}+0.5 \Rightarrow \mathrm{I}_{\mathrm{BC}}=4.5 \mathrm{~A}$
At junction $\mathrm{C}, \mathrm{I}=\mathrm{I}_{\mathrm{BC}}-1=4.5-1=3.5 \mathrm{~A}$

Answer

3.5 A

Answer

1.5 A

Answer

4 A

Answer

2.5 A

Current Electricity

The figure shows currents in a part of electric circuit. Then current I is

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