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Current Electricity — Physics STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 SciencePhysicsCurrent Electricity1 Mark
Question
Calculate the value of current $I_4.$
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Answer

Current $I_4$ can be calculated using Kirchhoff’s first law. The sum of current arriving at a junction is equal to the currents leaving the junction.
Here, Currents arriving at a junction $ : 7A + 5A = 12A$
Currents leaving the junction $: 3A + I_4$
Equating both the currents $: 12A = 3A + I_4$
$I_4 = 9A$

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