In the given circuit if  V1 = V2 = V3 = V4 = 10 V , then find the value of voltage V₅.

Concept:

Kirchoff’s second law:

This law is also known as loop rule or voltage law (KVL) and according to it “the algebraic sum of the changes in potential in the complete traversal of a mesh (closed-loop) is zero”, i.e. Σ V = 0.
This law represents “conservation of energy” as if the sum of potential changes around a closed loop is not zero, unlimited energy could be gained by repeatedly carrying a charge around a loop.
If there are n meshes in a circuit, the number of independent equations in accordance with loop rule will be (n - 1).

EXPLANATION:

Kirchhoff's second law is nothing but Kirchhoff's voltage law (KVL)

According to KVL, we have 

Similarly, Kirchhoff's first law or Kirchhoff's current law (KCL) gives the conservation of charge.

Calculation:

Given V₁ = V₂ = V₃ = V₄ = 10 V

By applying KVL, - V1 + V2 + V3 - V4 + V₅ = 0

-10 + 10 + 10 - 10 + V₅ = 0

V₅ = 0 V