KCET · Physics · Current Electricity
The value of I in the figure shown below is
- A \( 8 \mathrm{~A} \)
- B \( 21 \) A
- C \( 19 \mathrm{~A} \)
- D \( 44 \)
Answer & Solution
Correct Answer
(B) \( 21 \) A
Step-by-step Solution
Detailed explanation
According to Kirchhoff's 1st law, at any junction in a circuit, the sum of currents arriving at the junction is equal to the sum
of currents leaving the junction.
Therefore, \( 20 A+4 A=3 A+I \)
\( \Rightarrow I=21 A \)
of currents leaving the junction.
Therefore, \( 20 A+4 A=3 A+I \)
\( \Rightarrow I=21 A \)
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