A dynamo converts

Options

A. mechanical energy into sound energy
B. mechanical energy into electrical energy
C. electrical energy into mechanical energy
D. electrical energy into sound energy

Answer

**Step-by-Step Solution:**

1. **Understanding the Function of a Dynamo:**
A dynamo is a device that converts mechanical energy into electrical energy. It operates on the principle of electromagnetic induction.

2. **Input and Output of a Dynamo:**
- **Input:** The dynamo receives mechanical energy, which can come from various sources such as a rotating wheel or a hand crank.
- **Output:** The dynamo converts this mechanical energy into electrical energy, which can then be used to power electrical devices.

3. **Evaluating the Options:**
- **Option 1:** Mechanical energy into sound energy - This is incorrect. While some sound may be produced due to the operation of the dynamo, its primary function is not to convert mechanical energy into sound energy.
- **Option 2:** Mechanical energy into electrical energy - This is correct. This accurately describes the primary function of a dynamo.
- **Option 3:** Electrical energy into mechanical energy - This describes the function of an electric motor, not a dynamo. Therefore, this is incorrect.
- **Option 4:** Electrical energy into sound energy - This is also incorrect, as a dynamo does not take electrical energy as input.

4. **Conclusion:**
The correct conversion that a dynamo performs is from mechanical energy to electrical energy.

**Final Answer:**
A dynamo converts mechanical energy into electrical energy.

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