Question

Mark the correct equation:

• A. For loop ahdba; $30 i_{1}+45-41 i_{3}=0$
• B. For loop ahdefga; $-30 i-21 i_{2}+80=0$
• C. For loop abcdha; $41 i_{3}-45+30 i_{2}-80=0$
• D. For loop abcdefga; $41 i_{3}-45+21 i_{2}-80=0$

Answer 1

Answer: (D)

Along the direction of current across a resistance, the potential drops. From positive terminal of a battery to the negative terminal of a battery, potential drops and vice-versa. For loop abcdefga, gain in potential has been taken as positive and drop in potential has been taken as negative.