WAECPhysicsElectricity2021

The device that converts electrical energy to mechanical energy is a:

AGenerator
BMotorCORRECT
CTransformer
DBattery
AI
Toasta AI Explanation
Why the answer is B, and why the others tempt you.
**The reasoning** Think about energy conversion — what goes in, what comes out: - A **motor** takes electrical energy (from a power source) and converts it into mechanical energy (motion/rotation). That's exactly what the question asks for. When you plug in a fan, blender, or electric car, the motor inside transforms electricity into movement. The principle here is **energy conversion** — devices are defined by their input → output transformation. **Why the wrong options tempt you** - **Generator** does the *opposite* — it converts mechanical energy (like spinning turbines) into electrical energy. It's the motor's reverse twin, so students confuse them. - **Transformer** changes voltage levels but keeps energy as electrical throughout (high voltage ↔ low voltage). No mechanical conversion. - **Battery** stores chemical energy and releases it as electrical energy. It's a storage device, not a converter to mechanical form. **Quick takeaway** **Motor = Electrical → Mechanical** (makes things move). **Generator = Mechanical → Electrical** (makes electricity from motion). They're opposites — remember one, you know both!
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