There are two main types of backup generators viz., AC generators and DC generators. An AC generator creates an alternating current that periodically reverses direction. But in a DC generator, a direct current flows in one direction. AC generators are commonly used to power smaller electrical appliances. They are cost effective and requires lower maintenance.
AC generator converts

Options

A. Mechanical energy to electrical energy.
B. Electrical energy to mechanical energy.
C. Electrical energy to heat energy.
D. Mechanical energy to heat energy.

Explanation

To solve the question regarding what an AC generator converts, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Types of Generators**:
- Recognize that there are two main types of generators: AC (Alternating Current) generators and DC (Direct Current) generators.

2. **Function of AC Generators**:
- An AC generator produces alternating current, which means the current periodically reverses direction.

3. **Energy Conversion Process**:
- The key function of an AC generator is to convert one form of energy into another. In this case, it converts mechanical energy into electrical energy.

4. **Comparison with DC Generators**:
- While AC generators convert mechanical energy to electrical energy, DC generators produce direct current, which flows in one direction.

5. **Conclusion**:
- Based on the information provided, the correct statement is that an AC generator converts mechanical energy into electrical energy.

### Final Answer:
An AC generator converts mechanical energy into electrical energy.

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