Problem 43 - A Complete Resource Book in Physics for JEE Main

Question

Kirchhoff's second law is based on the law of conservation of (A) Momentum (B) Charge (C) Energy (D) Sum of mass and energy

Step-by-Step Solution

Answer

Kirchhoff's second law, also known as the Voltage Law or Loop Rule, is based on the law of conservation of energy. It states that the sum of voltage drops and sources in a closed loop of a circuit is equal to zero, which implies that the total energy in the loop is conserved. Hence, the correct answer is (C) Energy.

Step 1: Understand Kirchhoff's Second Law

Kirchhoff's second law, also known as the Voltage Law or Loop Rule, states that the sum of the voltage (electric potential) drops around a closed loop in a circuit is equal to the sum of the voltage sources present in that loop. In other words, the algebraic sum of all the potential differences (voltages) around any closed loop or mesh in a network is always equal to zero.

Step 2: Relate Kirchhoff's Second Law to the Law of Conservation

Kirchhoff's second law is based on the law of conservation of energy. This is because the voltage around a closed loop in a circuit represents electric potential energy. When we sum up the voltage drops and sources in the loop and equate it to zero, it implies that the total energy in the loop is conserved.

Step 3: Identify the Correct Option

From the analysis above, it is clear that Kirchhoff's second law is based on the law of conservation of energy. Therefore, the correct option is: (C) Energy