The algebraic sum of all voltage drops and EMFS in any closed loop of a circuit is zero. This law is called

Concept:

Kirchhoff’s Voltage Law (KVL):

It states that the sum of the voltages or electrical potential differences in a closed network is zero. 

Mathematically we can express this as:

\(\mathop \sum \limits_{n = 1}^M {V_n} = 0\)

Where Vn represents the nth Voltage

M is the total number of voltage elements.

Example:

according to KVL

\(\mathop \sum \limits_{n = 1}^M {V_n} = 0\)

apply KVL to the above circuit

- V + V1 + V2 = 0

V - V1 - V2 = 0

Note: KCL is based on the law of conservation of charge.