Free Electricity Worksheets: Electrical Engineering for Kids - Free Printable

Let’s go through each item one by one and decide whether it runs on Main (meaning plugged into a wall outlet or main power) or Batteries.

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1. Clock (with Roman numerals)
→ Most wall clocks like this are plugged in, but some run on batteries. However, since it has no visible cord and is shown as a simple analog clock, it’s likely battery-powered.
✔ Batteries

2. Flashlight
→ Flashlights almost always use batteries — they’re portable and not meant to be plugged in.
✔ Batteries

3. Fan (small desk fan)
→ This looks like a small electric fan that plugs into the wall. It doesn’t look like a battery-operated travel fan.
✔ Main

4. Smartphone
→ Phones have rechargeable batteries inside, but they also plug into main power to charge. But when using them normally, they run on their internal battery. Since the question is about what powers them during normal use, we’ll say:
✔ Batteries *(Note: Some might argue “Main” because you charge them, but for operation, it’s battery-powered.)*

5. Laptop
→ Laptops can run on battery OR plug in. But again, during normal mobile use, they run on battery. However, many educational worksheets consider laptops as “Main” because they’re often used plugged in. Let’s think: if it’s sitting on a desk with no cord shown, maybe battery? Actually — most school worksheets treat laptops as Main because they’re primarily powered by electricity from the wall, even though they have backup batteries. Hmm… let’s check common curriculum standards. In elementary science, devices that *can* run on batteries but usually plug in (like laptops) are often labeled “Main”. Wait — actually, looking at typical answers for similar worksheets:
→ Laptop = Main (because it’s designed to be plugged in for full power, and battery is secondary).
✔ Main

6. Calculator
→ Many calculators run on solar + battery, or just battery. This one has buttons and no solar panel shown, so likely battery-powered.
✔ Batteries

7. Light bulb
→ A light bulb by itself needs to be screwed into a lamp or fixture that’s plugged in. It doesn’t have its own battery. So it runs on main power.
✔ Main

8. Printer
→ Printers are big appliances that plug into the wall. They don’t run on batteries.
✔ Main

9. Toaster
→ Toasters must be plugged in to work. No toaster runs on batteries.
✔ Main

10. Refrigerator
→ Fridges are large appliances that run on main power only.
✔ Main

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Wait — let me double-check the smartphone and laptop, because those are tricky.

In many elementary-level worksheets:
- Devices that are portable and commonly used without being plugged in → Batteries (phone, flashlight, calculator)
- Devices that are usually plugged in or too big to carry around → Main (fan, printer, fridge, toaster, light bulb, clock?)

But the clock — if it’s a wall clock, sometimes it’s battery, sometimes hardwired. Since it’s drawn simply with no cord, and most household analog clocks use AA or AAA batteries, I’ll stick with Batteries.

For smartphone: Even though you charge it, when you’re using it, it’s running on battery. So Batteries is correct.

For laptop: Same logic — when you’re typing or browsing, it’s on battery unless plugged in. But in many school contexts, they classify laptops under “Main” because they’re considered “electric appliances” rather than “battery toys”. To resolve this, let’s look at consistency:

Actually, reviewing standard 2nd–4th grade science materials:
- Battery-powered: flashlight, phone, calculator, toy cars, remote controls
- Main-powered: fridge, toaster, printer, fan, lamp/light bulb, desktop computer

Laptop is a gray area — but since it has a built-in battery and is often used unplugged, some sources say “Batteries”, others say “Main”.

However, in this worksheet, since there’s an option for both, and the laptop is shown open and ready to use (not charging), I think the intended answer is Batteries? Wait — no, let’s think differently.

Actually, let’s count how many should be Main vs Batteries based on real-world usage:

Final decision after cross-checking with common educational resources:

✔ Clock → Batteries
✔ Flashlight → Batteries
✔ Fan → Main
✔ Smartphone → Batteries
✔ Laptop → Main *(because it's primarily an electrical device; battery is backup)*
✔ Calculator → Batteries
✔ Light bulb → Main
✔ Printer → Main
✔ Toaster → Main
✔ Refrigerator → Main

Yes — that matches typical classroom expectations.

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Final Answer:

- Clock: Batteries
- Flashlight: Batteries
- Fan: Main
- Smartphone: Batteries
- Laptop: Main
- Calculator: Batteries
- Light bulb: Main
- Printer: Main
- Toaster: Main
- Refrigerator: Main