"For which applications the DC and AC current is used. Describe the devices to convert AC into DC voltage and vice versa with working function for each"

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Applications of AC Current

Home and office outlets are almost always used in AC. This is because generating and transporting AC across long distances and relatively easy. At high voltages like as over 110kV, less energy is lost in electrical power transmission. Higher voltages mean lower currents, and lower currents mean less heat generated in the power line due to resistance. AC can be converted from high voltages easily using transformers.

AC is also capable of powering electric motors. Motors and generators are the exact same device, but motors convert electrical energy into mechanical energy. This is useful for many large appliances like refrigerators, dishwashers, and so on, which run on AC.

Applications of DC Current

All electronics projects and parts for sale on SparkFun run on DC. Everything that runs off of a battery, plugs into the wall with an AC adapter, or uses a USB cable for power relies on DC. Examples of DC electronics include:

  • Cell phones
  • Flashlights\
  • The LilyPad-based D&D Dice Gauntlet
  • Flat-screen TVs (AC goes into the TV, which is converted to DC)
  • Hybrid and electric vehicles

What device convert AC to DC?

Converting DC power from one voltage to another is much more complicated. One method of DC-to-DC conversion first converts power to AC (using a device called an inverter), then uses a transformer to change the voltage, and finally rectifies power back to DC.

What device convert DC to AC?

A power inverter, or inverter, is an electronic device or circuitry that changes direct current (DC) to alternating current (AC). The input voltage, output voltage and frequency, and overall power handling depend on the design of the specific device or circuitry.

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