Key Idea Apply Kirchhoff' second law also called loop rule. The algebraic sum of the changes in potential in complete transversal of a mesh (closed loop) is zero. ie,ΣV=0 Here ε1−(i1+i2)R−i1r1=0 If there are n meshes in a circuit, the number of independent equations in accordance with loop law will be (n−1).
NEET UG 2009 — Physics Electromagnetism
2009mcqmedium
See the electrical circuit shown in this figure. Which of the following equations is a correct equation for it? 
Official previous-year question
Held on 30 Apr 2009 · Verified 9 Jul 2026.
Options
- A
ε1−(i1+i2)R−i1r1=0
- B
ε2−i2r2−ε1−i1r1=0
- C
−ε2−(i1+i2)R+i2r2=0
- D
ε1−(i1+i2)R+i1r1=0
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