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Question: Answered & Verified by Expert
See the electrical circuit shown in this figure. Which of the following equations is a correct equation for it?

PhysicsCurrent ElectricityNEETNEET 2009 (Mains)
Options:
  • A $\in_1-\left(i_1+i_2\right) R+i_1 r_1=0$
  • B $\in_1-\left(i_1+i_2\right) R-i_1 r_1=0$
  • C $\in_2-i_1 \mathrm{r}_2-\varepsilon_1-\mathrm{i}_1 \mathrm{r}_1=0$
  • D $-\epsilon_2-\left(i_1+i_2\right) R+i_2 r_2=0$
Solution:
1712 Upvotes Verified Answer
The correct answer is: $\in_1-\left(i_1+i_2\right) R-i_1 r_1=0$


For loop (3)
$E_1-\left(i_1+i_2\right) R-i_1 r_1=0$
For loop (4)
$-\mathrm{E}_1+\mathrm{i}_1 \mathbf{r}_1-\mathrm{i}_2 \mathbf{r}_2+\mathrm{E}_2=0$
For loop (1)
$E_2-\left(i_1+i_2\right) R-i_2 r_2=0$

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