Which device changes direct current to alternating current?

Which device changes direct current to alternating current?

• A. Rectifier
• B. Inverter
• C. Converter
• D. Transformer

Answer: (B)

Converting direct current to alternating current is done by an inverter. An inverter takes DC from a source such as a battery or solar panel and uses fast switching electronics to chop and reassemble that DC into an alternating waveform. By controlling the switching pattern, the inverter can produce the desired AC voltage and frequency, making it suitable for powering standard AC devices or feeding a grid-tied system. This is different from a rectifier, which converts AC to DC; a transformer, which only works with AC input to change voltage levels; and a converter, a broader term that isn’t specific to DC-to-AC conversion. In practice, inverters often use PWM or other techniques to approximate a smooth sine wave, with higher quality sine-wave inverters better for sensitive electronics.

Converting direct current to alternating current is done by an inverter. An inverter takes DC from a source such as a battery or solar panel and uses fast switching electronics to chop and reassemble that DC into an alternating waveform. By controlling the switching pattern, the inverter can produce the desired AC voltage and frequency, making it suitable for powering standard AC devices or feeding a grid-tied system. This is different from a rectifier, which converts AC to DC; a transformer, which only works with AC input to change voltage levels; and a converter, a broader term that isn’t specific to DC-to-AC conversion. In practice, inverters often use PWM or other techniques to approximate a smooth sine wave, with higher quality sine-wave inverters better for sensitive electronics.