Question

Which of the following laws states that, “There is no accumulation of electric charge at any junction in an electric circuit”?

• A. Ohm's law
• B. Kirchhoff's law
• C. Faraday's law
• D. Joule's law

Hint:

Kirchhoff’s Current Law (KCL) is based on conservation of charge: Total current entering a junction equals total current leaving it.

Answer 1

The Correct Option is B

Concept:
Kirchhoff’s Current Law (KCL) states that the total current entering a junction in an electric circuit is equal to the total current leaving the junction. This law is based on the principle of conservation of electric charge. Since charge cannot accumulate at a junction, whatever charge enters must leave. Mathematically, \[ \sum I_{\text{in}} = \sum I_{\text{out}} \]

Step 1: Understanding the meaning of the statement.
The question says: \[ \text{“There is no accumulation of electric charge at any junction.”} \] This directly means that charge does not remain stored at the junction point. Hence, incoming current must equal outgoing current. This principle is exactly stated by Kirchhoff’s Current Law.

Step 2: Checking the remaining options.

• Ohm’s law relates voltage, current, and resistance: \[ V = IR \]
• Faraday’s law deals with electromagnetic induction.
• Joule’s law explains the heating effect of electric current. None of these laws discuss conservation of charge at a junction. Therefore, the correct answer is: \[ \boxed{(2)\ \text{Kirchhoff's law}} \]