Simple Electric Circuit worksheet - Free Printable

Problem Analysis:

The worksheet focuses on understanding the components and behavior of a simple electrical circuit. Let's solve each question step by step.

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1. Name the parts of the circuit labelled X, Y, and Z.

#### Diagram Analysis:
- X: This is the light bulb, which is the component that converts electrical energy into light and heat.
- Y: This is the battery, which provides the power source for the circuit.
- Z: This is the switch, which controls the flow of electricity in the circuit.

#### Answers:
- X: Light bulb
- Y: Battery
- Z: Switch

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2. Write the letter of the path that best matches each statement.

#### Statements:
i. Provides the power source
ii. Path for electrons to flow
iii. Opens or closes the circuit

#### Analysis:
- Power source: The battery (Y) provides the power source for the circuit.
- Path for electrons to flow: The wires (the circular paths connecting the components) allow electrons to flow.
- Opens or closes the circuit: The switch (Z) controls whether the circuit is open or closed.

#### Answers:
i. Y
ii. Wires (not explicitly labeled, but implied as part of the circuit)
iii. Z

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3. Explain what happens to the light bulb when the switch is closed.

#### Explanation:
When the switch is closed, it completes the circuit, allowing a continuous flow of electrons from the battery through the wires, through the light bulb, and back to the battery. This flow of electrons causes the filament in the light bulb to heat up, producing light.

#### Answer:
When the switch is closed, the light bulb turns on because the circuit is complete, allowing electrons to flow through the bulb, causing it to light up.

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4. What is the name given to an object that does not allow electrons to flow through it easily?

#### Explanation:
An object that does not allow electrons to flow through it easily is called an insulator. Examples of insulators include rubber, plastic, and glass.

#### Answer:
Insulator

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5. Which object is the best conductor of electricity?

#### Options:
a. Plastic
b. Glass
c. Copper

#### Explanation:
- Plastic and glass are insulators, meaning they do not conduct electricity well.
- Copper is a excellent conductor of electricity due to its ability to allow electrons to flow freely.

#### Answer:
c. Copper

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6. Mr. Smith works at an electrical plant. He wears rubber gloves to work every day. Explain why Mr. Smith uses these gloves daily.

#### Explanation:
Rubber is an insulator, meaning it does not allow electricity to pass through it easily. By wearing rubber gloves, Mr. Smith protects himself from electric shocks. If he were to accidentally touch a live wire, the rubber gloves would prevent the current from flowing through his body, keeping him safe.

#### Answer:
Mr. Smith wears rubber gloves to protect himself from electric shocks. Rubber is an insulator, so it prevents electricity from passing through to his body, ensuring his safety while working with electrical equipment.

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Final Answers:

1.
- X: Light bulb
- Y: Battery
- Z: Switch

2.
- i. Y
- ii. Wires
- iii. Z

3. When the switch is closed, the light bulb turns on because the circuit is complete, allowing electrons to flow through the bulb, causing it to light up.

4. Insulator

5. c. Copper

6. Mr. Smith wears rubber gloves to protect himself from electric shocks. Rubber is an insulator, so it prevents electricity from passing through to his body, ensuring his safety while working with electrical equipment.

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Boxed Final Answer:

\[
\boxed{
\begin{array}{l}
1. \text{X: Light bulb, Y: Battery, Z: Switch} \\
2. \text{i. Y, ii. Wires, iii. Z} \\
3. \text{The light bulb turns on when the switch is closed.} \\
4. \text{Insulator} \\
5. \text{c. Copper} \\
6. \text{Rubber gloves protect Mr. Smith from electric shocks.}
\end{array}
}
\]