Posted by In Chapter 9 of RBSE Class 6 Science, titled “Electricity and Circuits,” students learn the basics of electricity, how electric circuits work, and the roles of conductors and insulators. This chapter lays the foundation for understanding electrical systems by explaining concepts related to batteries, circuits, switches, and the flow of electric current.
Table of Contents
RBSE Solutions for Class 6 Science Chapter 9 – Electricity and Circuits Exercise Questions
1. Fill in the blanks :
(a) A device that is used to break an electric circuit is called _______________.
(b) An electric cell has _______________ terminals.
Solution:
(a) A device that is used to break an electric circuit is called switch.
(b) An electric cell has two terminals.
2. Mark ‘True’ or ‘False’ for following statements:
(a) Electric current can flow through metals.
(b) Instead of metal wires, a jute string can be used to make a circuit.
(c) Electric current can pass through a sheet of thermo Col.
Solution:
(a) True
(b) False
(c) False
3. Explain why the bulb would not glow in the arrangement shown in Fig. 12.13.
Solution:
The bulb would not glow in the arrangement because the circuit is not complete due to the presence of an insulator in the centre.
4. Complete the drawing shown in Fig 12.14 to indicate where the free ends of the two wires should be joined to make the bulb glow.
Solution:
5. What is the purpose of using an electric switch? Name some electrical gadgets that have switches built into them.
Solution:
The purpose of an electric switch is to complete or break the circuit. Electrical gadgets that have switches built into them are fans, refrigerators, television, microwave ovens, and electric cookers.
6. Would the bulb glow after completing the circuit shown in Fig. 12.14 if instead of a safety pin we use an eraser?
Solution:
No, the bulb will not glow as the eraser is an insulator.
7. Would the bulb glow in the circuit shown in Fig. 12.15?
Solution:
No, the bulb will not glow.
8. Using the “conduction tester” on an object it was found that the bulb begins to glow. Is that object a conductor or an insulator? Explain.
Solution:
The object is a conductor because the bulb glows only when the conductor is used but not when the insulator is used.
9. Why should an electrician use rubber gloves while repairing an electric switch at your home? Explain.
Solution:
An electrician uses rubber gloves while repairing an electric switch at your home because rubber gloves are insulators. This protects him from avoiding electric shocks.
10. The handles of the tools like screwdrivers and pliers used by electricians for repair work usually have plastic or rubber covers on them. Can you explain why?
Solution:
Tools like screwdrivers and pliers are used by electricians for repair work because plastic is an insulator, and plastic handles protect the electrician from electric shocks.
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Key Topics Covered in Chapter 9: Electricity and Circuits
- What is Electricity?
- Electricity is a form of energy that flows through a circuit and is used to power various devices.
- It comes from sources like batteries and power stations and enables devices like lights, fans, and motors to function.
- Electric Circuits
- An electric circuit is a complete path through which electric current can flow.
- It includes a power source (like a battery), connecting wires, and a device (like a bulb or motor) that uses the electricity.
- If the circuit is closed (complete), the electric current flows; if the circuit is open (incomplete), current cannot flow.
- Battery as a Power Source
- A battery is a device that stores electrical energy and provides it to the circuit.
- Batteries have two terminals: a positive terminal (+) and a negative terminal (-).
- When connected to a circuit, batteries supply the energy needed to make the current flow.
- Types of Materials: Conductors and Insulators
- Conductors are materials that allow electric current to flow through them easily (e.g., metals like copper and aluminum).
- Insulators are materials that do not allow current to flow through them (e.g., rubber, plastic, wood).
- Conductors are used in wires, while insulators are used as coverings to prevent accidental electric shocks.
- Switches
- A switch is a device that can open or close an electric circuit.
- When the switch is on, the circuit is closed, and current flows. When the switch is off, the circuit is open, and current stops.
- Switches are essential for controlling electrical devices.
RBSE Class 6 Science Chapter 9 Solutions
Q1. What is an electric circuit?
- Answer: An electric circuit is a complete path through which electric current can flow, consisting of a power source, wires, and an electric device.
Q2. What are conductors and insulators? Give examples.
- Answer:
- Conductors are materials that allow current to pass through them, such as copper and aluminum.
- Insulators are materials that do not allow current to pass through them, like plastic and rubber.
Q3. How does a switch work?
- Answer: A switch controls the flow of electricity in a circuit. When turned on, it closes the circuit, allowing current to flow. When turned off, it opens the circuit, stopping the current.
Q4. What are the two terminals of a battery?
- Answer: A battery has a positive terminal (+) and a negative terminal (-), which are used to connect it to an electric circuit.
Q5. Why are electric wires covered with plastic or rubber?
- Answer: Wires are covered with plastic or rubber to insulate them, preventing accidental electric shocks by stopping current from flowing outside the conductor.
FAQs for RBSE Class 6 Science Chapter 9
1. What is the role of a battery in an electric circuit?
Answer: A battery supplies the necessary energy to the electric circuit, allowing current to flow and power devices like bulbs or motors.
2. What is the difference between conductors and insulators?
- Answer: Conductors allow electric current to flow through them (e.g., metals), while insulators block current flow (e.g., rubber).
3. How does current flow in a closed circuit?
- Answer: In a closed circuit, the path is complete, allowing electric current to flow continuously from the power source through the connecting wires to the electric device.
4. Why is a switch important in a circuit?
- Answer: A switch helps control the flow of electricity in a circuit by opening (stopping current) or closing (allowing current) the path.
5. Can insulators conduct electricity under any condition?
- Answer: Generally, insulators do not conduct electricity. However, certain insulators can conduct electricity if subjected to very high voltages.
Conclusion
Chapter 9 of RBSE Class 6 Science, “Electricity and Circuits,” provides students with an essential understanding of how electric circuits function, including the roles of conductors, insulators, and switches. This foundation prepares students for more advanced studies in physics and electronics, helping them understand how electricity powers the devices they use daily.