The basic laws for analyzing an electric circuit are :

Options

A. Einstein's theory
B. Newton's laws
C. Kirchhoff's laws
D. Faraday's laws

Answer

To analyze an electric circuit, we rely on certain fundamental laws. The question asks for the basic laws used in this analysis. Here’s a step-by-step breakdown of the solution:

### Step 1: Identify the Options
The question provides four options:
1. Einstein's theory
2. Newton's law
3. Kirchhoff's law
4. Faraday's law

### Step 2: Analyze Each Option
- **Einstein's theory**: This is related to modern physics, specifically the theory of relativity, and does not pertain to electric circuits.

- **Newton's law**: These laws are foundational in mechanics and describe motion, not electrical circuits.

- **Kirchhoff's law**: This law is specifically designed for analyzing electrical circuits. It consists of two main parts:
- **Kirchhoff's Current Law (KCL)**: The sum of currents entering a junction equals the sum of currents leaving the junction.
- **Kirchhoff's Voltage Law (KVL)**: The sum of the electrical potential differences (voltage) around any closed circuit is zero.

- **Faraday's law**: This law relates to electromagnetic induction and is not primarily concerned with circuit analysis.

### Step 3: Conclusion
From the analysis, it is evident that the correct answer is **Kirchhoff's law**. This law is essential for analyzing electric circuits, making it the most relevant option among those provided.

### Final Answer
The basic laws for analyzing an electric circuit are **Kirchhoff's law**.

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