The figure below shows currents in a part of electric circuit. The current $i$ is

• Correct answer
  A

  $1.7 \mathrm{amp}$
• B

  $3.7 \mathrm{amp}$
• C

  $1.3 \mathrm{amp}$
• D

  1 amp In an electromagnetic wave

Solution

According to Kirchhoff's first law, At junction $\mathrm{A}, i_{A B}=2+2=4 \mathrm{~A}$ At junction $\mathrm{B}, i_{A B}=i_{B C}+1 \Rightarrow \mathrm{i}_{B C}=4-1=$ $3 \mathrm{~A}$
At junction $\mathrm{C}, i=i_{B C}-1.3=3-1.3=1.7 \mathrm{~A}$

Hence, the correct answer is option: 'A'.