zero. This law is based on the conservation of energy.
     Let us imagine in a circuit loop the potential difference between the two points at the beginning of the loop has a certain value. As we move around the circuit loop and measure the potential difference across each component in the loop, the potential difference may decrease or increase depending upon the nature of the element like a resistor or a battery. But when we have completely traversed the circuit loop and arrive back at our starting point, the net change in the potential difference must be zero. Thus, the algebraic sum of changes in potential differences is equal to zero.

• How could the sign convention be taken?

1. emf of the battery is taken as negative when we move from positive    terminal to negative terminal across the battery.

2. It is taken as positive when we move across the battery from negative    terminal to positive terminal.

3. The direction of electric current is to be observed to give a sign to    potential difference of a resistor.

4. The potential difference across the resistor is taken as negative    when we move along the direction of electric current through the    resistor.

5. It is taken as positive when we move against the direction of electric current through the
   resistor.

Example 1:s Find the resultaint potential difference from the given figure based on Loops law. Solution:s In ABCDEA loop, The potential difference at battery is -V₁ at resistance R₁ the potential difference is I₁sub> R1 the resultaint potential difference in the circuit is = - V₁ + I₁ R₁ = 0
Example 2: Find the resultaint potential difference from the given figure based on Loops law.
Solution: Let us apply Loop law to the given circuit. At battery v₁ the potential difference is –V₁ the potential difference at v₂ = – V₂