Free Electricity Worksheets: Electrical Engineering for Kids - Free Printable

Final Answer:
The worksheet is a sorting activity where students identify whether each pictured device uses Main power (plugged into an outlet) or Batteries (runs on battery power). No single answer is required — the student fills in the checkboxes based on real-world knowledge. Since the task is to complete the worksheet and no specific question was asked, there is no numerical or one-word final answer. However, if the expectation is to list correct classifications for all items:

- Clock (analog wall clock): Batteries *(most modern analog wall clocks are battery-powered; some plug-in, but standard classroom examples assume battery)*
- Flashlight: Batteries
- Fan (desk fan): Main *(typically plugged in; battery fans exist but this image shows a standard AC fan)*
- Smartphone: Batteries *(charges via main, but runs on internal battery — task likely expects “Batteries” for portable devices)*
- Laptop: Batteries *(uses internal battery; can be plugged in, but primary operation is battery-powered)*
- Calculator: Batteries *(standard basic calculators use batteries; solar + battery models still count as batteries)*
- Light bulb (incandescent, shown alone): Main *(a bulb alone implies it’s part of a fixture connected to mains; standalone bulb isn’t functional without power source — context suggests mains-powered lamp)*
- Printer: Main *(desktop printers plug into wall outlet)*
- Toaster: Main *(always plugged in)*
- Refrigerator: Main *(always plugged in)*

But since the worksheet has blank checkboxes and no explicit question, and per instructions we must give *only* the final answer after reasoning — and the user did not ask a specific question — the appropriate response is that this is a classification exercise, and the student should check:

✔ Batteries: Clock, Flashlight, Smartphone, Laptop, Calculator, Light bulb *(if interpreted as portable lamp — but ambiguous)*
✔ Main: Fan, Printer, Toaster, Refrigerator

However, light bulb is ambiguous. In most school worksheets like this, a *bare light bulb* image is meant to represent a bulb used in a lamp that plugs in → Main. Similarly, desk fan is almost always Main.

Let’s finalize based on typical curriculum expectations:

1. Wall clock (analog with hands) → Batteries
2. Flashlight → Batteries
3. Desk fan → Main
4. Smartphone → Batteries
5. Laptop → Batteries
6. Calculator → Batteries
7. Light bulb (standalone) → Main *(assumed part of a powered fixture)*
8. Printer → Main
9. Toaster → Main
10. Refrigerator → Main

Since the task is to fill checkboxes and no single answer is requested, but the instruction says “Provide only the final answer”, and the format requires one, the only valid interpretation is that the worksheet expects the student to mark the correct power source per item — thus there is no aggregate answer.

But given the system requires a Final Answer, and this is likely a matching/sorting task with no computation, the safest conclusion is:

The correct selections are:
- Clock: Batteries
- Flashlight: Batteries
- Fan: Main
- Phone: Batteries
- Laptop: Batteries
- Calculator: Batteries
- Light bulb: Main
- Printer: Main
- Toaster: Main
- Fridge: Main

So if forced to give a compact final answer as a list:

Final Answer:
Batteries: Clock, Flashlight, Smartphone, Laptop, Calculator
Main: Fan, Light bulb, Printer, Toaster, Refrigerator