physics
نص القصة المصورة
- Hey, Dr. Dynamo! I've been reading about electricity, and I have some questions about direct current (DC) and alternating current (AC)!
- Ah, Sparky! I'm glad you're interested in electricity. DC and AC are the two main types of electrical current. DC flows in only one direction, while AC periodically changes direction. It's fascinating!
- So, does that mean batteries and solar cells produce DC?
- What about AC? Where does it come from?
- AC is generated by power plants. They use generators to produce a constantly changing current that alternates direction many times per second, just like waves in the ocean.
- Absolutely! Batteries and solar cells are examples of DC sources. They provide a steady flow of electrons in one direction, like a river flowing in a straight line.
- Good question! AC has the advantage of being able to travel long distances with less energy loss. It's also more efficient for powering large appliances and machinery.
- Wow, that's impressive! So, what's the advantage of using AC over DC?
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