Educational worksheet on electrical current with interactive exercises for learning circuit components and concepts.

Let's go through the worksheet step by step and solve each part with clear explanations.

---

1. Label the different components:

We are given a simple circuit diagram with four blank boxes to label. The components in a basic electrical circuit include:

- Battery (Power Source)
- Light Bulb (Electrical Device/Load)
- Switch
- Wires

Looking at the diagram:

- The battery is the rectangular box with "+" and "−" signs.
- The light bulb is the glowing object at the top.
- The switch is the red toggle-like component.
- The wires connect all parts together.

So, labeling from the image:

- Top left box → Light Bulb
- Top right box → Battery
- Bottom left box → Wire
- Bottom center box → Switch

✔ Labels:
- Light Bulb
- Battery
- Wire
- Switch

---

2. Match these words with the correct definition:

| Term | Definition |
|------|-----------|
| POWER SOURCE | it supplies the electrical current |
| CIRCUIT | a closed path of electricity |
| WIRES | they conduct electricity |
| CURRENT | the flow of electricity |
| SWITCH | it opens or closes the circuit |
| ELECTRICAL DEVICE/LOAD | converts electricity into another type of energy |

✔ Matching:

- POWER SOURCE → *it supplies the electrical current*
- CIRCUIT → *a closed path of electricity*
- WIRES → *they conduct electricity*
- CURRENT → *the flow of electricity*
- SWITCH → *it opens or closes the circuit*
- ELECTRICAL DEVICE/LOAD → *converts electricity into another type of energy*

---

3. Answer the following questions:

#### In radio, electrical energy is transformed into ... energy.

Options:
- mechanical
- sound ✔
- light
- heat

💡 Explanation: A radio converts electrical energy into sound energy to produce audio.

✔ Answer: sound

---

#### ... is an example of an electrical conductor material.

Options:
- Metal ✔
- Plastic
- Wood
- Glass

💡 Explanation: Metals like copper and aluminum are good conductors of electricity.

✔ Answer: Metal

---

#### In a simple circuit, why does a light bulb go out when you close the switch?

Wait — this seems incorrectly worded. Normally, a light bulb turns on when you close the switch (completing the circuit). But the question says “go out when you close the switch,” which contradicts normal behavior.

But let’s examine the options:

- Because the switch produces electricity. ✘ (No, the battery does)
- Because too much electricity flows through the bulb. ✘ (Not usually the case)
- Because the electricity doesn’t flow when you close the switch. ✘ (It should flow!)
- Because opening the switch breaks the circuit. ✔

Wait — but the question says “when you close the switch”, so the answer choices don't make sense unless there's a typo.

Actually, likely the question meant:
👉 "Why does a light bulb go out when you open the switch?"

Then the correct answer would be:
✔ Because opening the switch breaks the circuit.

But as written:
> "why does a light bulb go out when you close the switch?"

That’s wrong — closing the switch turns it on, not off.

So, if we assume a typo and it should be open, then:

✔ Answer: Because opening the switch breaks the circuit.

Alternatively, if we take it literally, none of the answers make sense. But since one choice says “opening the switch breaks the circuit,” that must be the intended correct answer.

So, likely the question has a typo.

✔ Best answer: Because opening the switch breaks the circuit.

(Though it should say “open” instead of “close”.)

---

#### Why is electrical wiring usually covered with a layer of plastic?

Options:
- It helps electricity to flow along the wire. ✘ (Plastic insulates, not conducts)
- It is an electrical conductor. ✘ (No, plastic is an insulator)
- It is not shiny or magnetic. ✘ (Irrelevant)
- It is a good electrical insulator so it makes it safe to touch the wire. ✔

💡 Explanation: Plastic prevents electric shock by stopping current from flowing to people or other objects.

✔ Answer: It is a good electrical insulator so it makes it safe to touch the wire.

---

4. Complete the missing words:

Let’s fill in based on context:

- It is responsible for supplying the electrical current. → POWER SOURCE
✔ Already filled.

- It opens or closes a circuit. → SWITCH
✔ Answer: SWITCH

- It conducts electricity. It is made out of copper. → WIRES
✔ Answer: WIRES

- It converts electricity into another type of energy. → ELECTRICAL DEVICE
✔ Answer: DEVICE (as per the hint)

---

✔ Final Answers Summary:

#### 1. Labels:
- Top left: Light Bulb
- Top right: Battery
- Bottom left: Wire
- Bottom center: Switch

#### 2. Matching:
- POWER SOURCE → it supplies the electrical current
- CIRCUIT → a closed path of electricity
- WIRES → they conduct electricity
- CURRENT → the flow of electricity
- SWITCH → it opens or closes the circuit
- ELECTRICAL DEVICE/LOAD → converts electricity into another type of energy

#### 3. Multiple Choice:
- In radio: sound
- Conductor: Metal
- Why bulb goes out: Because opening the switch breaks the circuit *(note: likely typo in question)*
- Plastic covering: It is a good electrical insulator so it makes it safe to touch the wire.

#### 4. Fill in blanks:
- It opens or closes a circuit. → SWITCH
- It conducts electricity... → WIRES
- It converts electricity... → DEVICE

---

Let me know if you'd like this formatted as a printable answer key!