Question 607: Current Electricity

Question

In the given electrical circuit, which one of the following equations is a correct equation?

Accepted Answer

The given circuit can be drawn as
Applying Kirchhoff's voltage law (KVL) in loop $A B C D A$, we get
$$-\left(i_1+i_2ight) R+E_2-i_2 r_2=0\quad	ext{.... (i)}$$
Applying KVL in loop ABFEA, we get
$$-\left(i_1+i_2ight) R-i_1 r_1+E_1=0\quad	ext{.... (ii)}$$
Applying KVL in loop EFCDE, we get
$$-E_1+i_1 r_1+E_2-i_2 r_2=0\quad	ext{.... (iii)}$$
From the given options, only option (c) satisfies Eq. (ii), hence it is the correct equation.

Answer

$E_2-i_2 r_2-E_1-i_1 r_1=0$

Answer

$E_1-\left(i_1+i_2\right) R+i_1 r_1=0$

Answer

$E_1-\left(i_1+i_2\right) R-i_1 r_1=0$

Answer

$-E_2-\left(i_1+i_2\right) R+i_2 r_2=0$

Current Electricity

In the given electrical circuit, which one of the following equations is a correct equation?

Choose the correct answer: