The device used for producing electric current is called a:
(a) generator.
(b) galvanometer.
(c) ammeter.
(d) motor.

Options

A. generator
B. galvanometer
C. ammeter
D. motor

Answer

To solve the question, we need to identify which device is specifically designed to produce electric current. Let's analyze each option step by step:

1. **Understanding the Options**:
- **Option (a) Generator**: A generator is a device that converts mechanical energy into electrical energy, producing electric current.
- **Option (b) Galvanometer**: A galvanometer is an instrument used to detect and measure small amounts of electric current, but it does not produce current.
- **Option (c) Ammeter**: An ammeter is a device used to measure the current in a circuit, but it also does not generate current.
- **Option (d) Motor**: A motor converts electrical energy into mechanical energy, and it does not produce electric current.

2. **Identifying the Correct Answer**:
- From the analysis, the only device that is specifically designed to produce electric current is the generator.

3. **Conclusion**:
- Therefore, the correct answer to the question "The device used for producing electric current is called a:" is **(a) generator**.

### Final Answer:
**(a) generator**