Maxwell unified

Options

A. Electricity with gravitation
B. Electricity with magnetism
C. Electromagnetism with optics
D. Electromagnetism with weak interaction

Answer

To solve the question regarding Maxwell's unification, we will analyze the concepts step by step.

### Step 1: Understanding Maxwell's Contribution
James Clerk Maxwell is known for his formulation of the classical theory of electromagnetic radiation. He unified electricity and magnetism into a single theory of electromagnetism.

### Step 2: Electromagnetic Induction
Maxwell's equations describe how electric fields and magnetic fields interact. One of the key principles is electromagnetic induction, which states that a changing electric field can produce a magnetic field and vice versa.

### Step 3: Induced EMF
According to Faraday's law of electromagnetic induction, the induced electromotive force (EMF) in a closed circuit is proportional to the rate of change of magnetic flux through the circuit. This is mathematically expressed as:
\[ \text{EMF} = -\frac{d\Phi_B}{dt} \]
where \( \Phi_B \) is the magnetic flux.

### Step 4: Conclusion
From the above analysis, it is clear that Maxwell unified electricity with magnetism. Therefore, the correct answer to the question is that Maxwell unified electricity with magnetism.

### Final Answer
**Maxwell unified electricity with magnetism.**

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