Name the type of current that is induced on the surface of a metallic solid when moved in a non-uniform magnetic field.

Options

A. Eddy current
B. Metallic current
C. Surface current
D. Induced current

Explanation

To solve the question regarding the type of current induced on the surface of a metallic solid when it is moved in a non-uniform magnetic field, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Context**:
- When a metallic solid is moved through a magnetic field, an electromotive force (EMF) can be induced due to the motion of the conductor in the magnetic field.

2. **Identifying the Type of Magnetic Field**:
- The question specifies a non-uniform magnetic field. This means that the strength and direction of the magnetic field vary from one point to another.

3. **Induction of Current**:
- According to Faraday's law of electromagnetic induction, a change in the magnetic environment of a coil or conductor will induce an EMF. In the case of a metallic solid moving in a non-uniform magnetic field, the induced EMF will cause a current to flow.

4. **Type of Induced Current**:
- The current induced in this scenario is known as **eddy current**. Eddy currents are loops of electric current that are induced within conductors by a changing magnetic field in the conductor.

5. **Effects of Eddy Currents**:
- Eddy currents can cause heating in the metallic solid due to the resistance of the material, leading to energy loss in the form of heat.

6. **Conclusion**:
- Therefore, the type of current that is induced on the surface of a metallic solid when moved in a non-uniform magnetic field is called **eddy current**.

### Final Answer:
**Eddy current**

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