A device which converts d.c.into a.c.is called

Options

A. Rectifier
B. Oscillator
C. Amplifier
D. Modulator

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the name of a device that converts direct current (DC) into alternating current (AC).

2. **Identifying the Options**: The options provided are:
- A) Rectifier
- B) Oscillator
- C) Amplifier
- D) Modulator

3. **Analyzing Each Option**:
- **Rectifier**: A rectifier is a device that converts AC to DC, not the other way around. Therefore, this option is incorrect.
- **Oscillator**: An oscillator is a device that generates AC signals from a DC source. This means it converts DC into AC, making this option a strong candidate for the correct answer.
- **Amplifier**: An amplifier increases the amplitude of signals but does not convert DC to AC. Thus, this option is incorrect.
- **Modulator**: A modulator is used to encode information onto a carrier wave, typically for communication purposes, and does not specifically convert DC to AC. Hence, this option is also incorrect.

4. **Conclusion**: Since the oscillator is the device that converts DC into AC, the correct answer is **B) Oscillator**.

**Final Answer**: The device which converts DC into AC is called an **Oscillator**.

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