Target Exam

CUET

Subject

Physics

Chapter

Current Electricity

Question:

The Kirchhoff's first law ($∑i = 0$) and second law ($∑iR = ∑E$) where the symbols have their usual meanings, are respectively based on

Options:

conservation of charge, conservation of momentum

conservation of energy, conservation of charge

conservation of momentum, conservation of charge

conservation of charge, conservation of energy

Correct Answer:

conservation of charge, conservation of energy

Explanation:

Kirchhoff's 1st law states that the total amount of current coming at a junction must be equal to the total amount of current going away from it i.e. the total charge must be conserved. Thus Kirchhoff's 1st law is based on the conservation of charge.

Kirchhoff's 2nd law states that the sum of the potential drop across all the components in a loop must be zero. Thus Kirchhoff's 2nd law is based on the conservation of energy.