Class 6 Science Chapter 12 Electricity and Circuits Extra Questions

# Class 6 Science Chapter 12 Electricity and Circuits Extra Questions

## Electricity and Circuits Class 6 Extra Questions Science Chapter 12

Electricity is a crucial part of our lives and it is important for students to understand how it works. The Class 6 Science Chapter 12 Electricity and Circuits will help students learn about the different types of circuits, how to build them, and how to troubleshoot them. They will also learn about the different types of electrical devices and how they work. This chapter will also teach students about safety precautions when working with electricity.

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## Long and Short Answer Type Extra Questions for Class 6 Science Chapter 12 Electricity and Circuits

### NCERT Extra Questions for Class 6 Science Chapter 12 Electricity and Circuits

Question 1: What is the direction of flow of current in a dry cell?

Answer: The current flows from the negative terminal (-) to the positive terminal (+).

Question 2: Name the +ve terminal of a dry cell.

Answer: The positive terminal is called the cathode.

Question 3: Name the -ve terminal of a dry cell.

Answer: The negative terminal is called the anode.

Question 4: What is dry cell?

Answer: A dry cell is a type of electrochemical cell that uses a paste electrolyte, unlike a wet cell that uses a liquid.

Question 5: What is solar cell?

Answer: A solar cell, or photovoltaic cell, is an electrical device that converts light energy directly into electricity.

Question 6: What is open circuit?

Answer: An open circuit is a circuit where there is a break in the path of the current, preventing it from flowing.

Question 7: Write one use of insulators.

Answer: Insulators are used to prevent the flow of electricity and to protect against electric shocks.

Question 8: What is the name of thin wire in the electric bulb?

Answer: The thin wire in an electric bulb is called the filament.

Question 9: What is inside the glass case of a bulb?

Answer: Inside the glass case of a bulb, there is a vacuum or an inert gas to prevent the filament from burning.

Question 10: Why does an electric bulb not glow when both the wires are connected to the same terminal of a cell?

Answer: When both wires are connected to the same terminal, there is no potential difference to create a flow of electricity through the bulb, so it does not glow.

Question 11: Give one difference between a cell and a battery.

Answer: A cell is a single unit that produces electricity, while a battery is a collection of cells.

Question 12: Write any two uses of electric cells.

Answer: Electric cells are used in flashlights, remote controls, and other portable electronic devices.

Question 13: Why do bulbs have two terminals?

Answer: Bulbs have two terminals to complete the circuit and allow electricity to flow through the filament, causing it to glow.

Question 14: A fused bulb does not glow. Why?

Answer: A fused bulb does not glow because the filament inside the bulb is broken, interrupting the flow of electricity.

Question 15: What are the essential components of an electric circuit?

Answer: The essential components of an electric circuit are a source of electricity (such as a battery), conductors (wires), and a load (such as a bulb).

Question 16: Why should you not touch electric appliances and switches with wet hands?

Answer: Wet hands can conduct electricity and increase the risk of electric shock when touching electric appliances and switches.

Question 17: When a bulb is fused, it does not light up. Explain why?

Answer: When a bulb is fused, the filament inside it is broken, which interrupts the flow of electricity and prevents it from glowing.

Question 18: Why does a cell stop producing electricity after sometime?

Answer: A cell stops producing electricity after some time because the chemicals inside it are used up in the electrochemical reaction that generates electricity.

### Long Answer Types Questions with Answer for Class 6 Science Chapter 12 Electricity and Circuits

Question 1: How can you explain that the human body is a good conductor of electricity?

Answer: The human body is a good conductor of electricity because it contains a large amount of water and electrolytes, such as salts, which can carry electric current. When a person comes into contact with an electric conductor, like a metal wire or a live wire, the electricity can flow through the body. This is why it is important to be cautious around electrical devices and to avoid touching them with wet hands, as water can increase the conductivity of the body and increase the risk of electric shock.

Questions 2: Why should we take care while handling electricity?

Answer: We should take care while handling electricity because it can be dangerous. Electricity can cause electric shocks, which can be painful and even fatal. It can also cause fires if not handled properly. Therefore, it is important to follow safety precautions when working with electricity, such as using insulated tools, wearing rubber gloves, and keeping water away from electrical appliances. Additionally, it is important to ensure that electrical appliances are properly maintained and that wires are not frayed or damaged. Taking these precautions can help prevent accidents and ensure the safe use of electricity.

Questions 3: What is the difference between conductor and an insulator? Explain with examples.

Answer: Conductors and insulators are two types of materials that behave differently when it comes to the flow of electricity.

Conductor: A conductor is a material that allows electricity to flow through it easily. Metals, such as copper and aluminum, are good conductors of electricity. When a conductor is connected to a voltage source, such as a battery, the free electrons in the conductor move in response to the electric field created by the voltage source, resulting in an electric current.

Insulator: An insulator, on the other hand, is a material that does not allow electricity to flow through it easily. Materials like rubber, plastic, and glass are good insulators. When an insulator is connected to a voltage source, the electrons in the material are tightly bound to their atoms and cannot move freely, so no electric current flows through the material.

Examples:

• Conductor: Copper wire is commonly used as a conductor in electrical wiring because it allows electricity to flow easily.
• Insulator: Rubber is used to cover electrical wires to prevent electric shocks because it does not conduct electricity.

Questions 4: If you touch an electric wire carrying current you get a shock, but if on the same wire the birds sit they do not get any shock/current. Explain why?

When a person touches an electric wire carrying current, they get a shock because their body provides a path for the current to flow through. The human body is a conductor of electricity, so when it comes in contact with a live wire, the current flows through it, causing a shock. However, when birds sit on the same wire, they do not get a shock because their bodies do not provide a path for the current to flow. Birds’ bodies do not conduct electricity as well as humans do, so the current does not flow through them. Additionally, birds often sit on only one wire, so there is no complete circuit for the current to flow through. This is why birds can sit on electric wires carrying current without getting shocked.

Questions 5: A torch is not functioning, though contact points in the torch are in working condition. What can be the possible reasons for this? Mention any three.

In a torch that is not functioning despite the contact points being in working condition, several possible reasons could be responsible for the issue:

1. Battery Depletion: The battery in the torch may be depleted or drained, leading to insufficient power to operate the torch. Replacing the battery could resolve the issue.
2. Faulty Switch: The switch in the torch may be faulty, causing a break in the circuit and preventing the flow of electricity. Repairing or replacing the switch could fix the problem.
3. Faulty Bulb or LED: The bulb or LED in the torch may be faulty or burned out, preventing it from producing light. Replacing the bulb or LED could restore the functionality of the torch.

It is important to systematically check these components to identify and rectify the issue, ensuring that the torch functions properly.

## Topics-wise Extra Questions for Class 6 Chapter 12 Electricity and Circuits with Answer

### Electric Cell – Extra Questions

Question 1: What is an electric cell?

An electric cell is a device that converts chemical energy into electrical energy. It consists of two different metals immersed in an electrolyte solution.

Question 2: What is meant by a battery?

A battery is a collection of two or more electric cells connected together to produce a larger amount of electrical energy. It provides power to various devices.

Question 3: Give any difference between a cell and a battery.

A cell is a single unit that produces electricity, while a battery is a collection of cells.
A cell has only two terminals (positive and negative), while a battery has multiple cells connected in series or parallel.

Question 4: Why does a cell stop producing electricity after some time?

A cell stops producing electricity after some time because the chemicals inside it that undergo the chemical reactions necessary for generating electricity get used up.

Question 5: Why should we not join the wires connected to the two terminals of the electric cell?

Joining the wires connected to the two terminals of the electric cell would create a short circuit. This would allow a very large current to flow through the wires, which could damage the cell and the wires, and also pose a risk of fire.

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### A Bulb Connected to an Electric Cell – Extra Questions

Question 1: How do we connect wires to the electric cell?

Answer: Wires are connected to an electric cell by using metal clips or holders. One wire is connected to the positive terminal (+), and the other wire is connected to the negative terminal (-) of the cell.

Question 2: How is the bulb connected to the wires?

Answer: The bulb is connected to the wires by attaching one wire to the metal base of the bulb and the other wire to the metal tip at the bottom of the bulb. This completes the circuit and allows electricity to flow through the bulb, causing it to glow.

Question 3: What are the advantages of dry cells?

Answer: Dry cells have several advantages, including being portable, easy to handle, and suitable for use in a wide range of electronic devices. They also have a longer shelf life and do not leak like wet cells.

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### An Electric Circuit – Extra Questions

Question 1: What is an electric circuit?

Answer: An electric circuit is a closed path through which electric current can flow. It typically consists of a source of electricity, such as a battery, conductors like wires, and a load, such as a bulb, that uses the electricity.

Question 2: What is the direction of the current in an electric circuit?

Answer: The current in an electric circuit flows from the positive terminal of the battery or cell to the negative terminal.

Question 3: Sometimes, an electric bulb does not glow even if it is connected to the cell. What could be the reason?

Answer: There could be several reasons for this. The bulb may be fused, the connections may be loose, the battery may be depleted, or there could be a break in the circuit.

Question 4: What is a filament?

Answer: A filament is a thin wire inside an electric bulb that glows when electricity passes through it. It is usually made of tungsten due to its high melting point and durability.

Question 5: Why does a fused bulb not light up?

Answer: A fused bulb does not light up because the filament inside it is broken. This break in the filament prevents the flow of electricity, thus preventing the bulb from glowing.

### Electric Switch – Extra Questions

Question 1: What is the purpose of using an electric switch? Name some electrical gadgets that have switches built into them.

Answer: The purpose of using an electric switch is to control the flow of electricity in a circuit. Some electrical gadgets that have switches built into them include lamps, fans, televisions, and radios.

Question 2: How are cells arranged in a torch—in parallel or in series?

Answer: Cells in a torch are typically arranged in series, where the positive terminal of one cell is connected to the negative terminal of the next cell, and so on.

Question 3: If in a circuit you have arranged cells in series. Will the bulb continue to shine even if the connection of one of the cells is reversed?

Answer: No, if the connection of one of the cells in a series arrangement is reversed, the bulb will not continue to shine. Reversing the connection of a cell in a series circuit changes the direction of the current flow, which can cause the circuit to break and the bulb to stop glowing.

### Electric Conductors and Insulators – Extra Questions

Question 1: What is a conductor? Give examples.

Answer: A conductor is a material that allows the flow of electricity through it. Examples of conductors include metals such as copper, aluminum, and iron.

Question 2: What is an insulator? Give few examples.

Answer: An insulator is a material that does not allow the flow of electricity through it. Examples of insulators include rubber, plastic, glass, and wood.

Question 3: Why does one remove the plastic coating of connecting wires before making circuits?

Answer: The plastic coating of connecting wires is removed to expose the metal conductor inside, allowing for a good electrical connection to be made.

Question 4: Why do you have to clean the ends of wires used for making a circuit with sandpaper to make the bulbs shine?

Answer: Cleaning the ends of wires with sandpaper removes any dirt or oxidation, ensuring a good electrical contact and allowing the bulbs to shine brightly.

Question 5: Is air a good or a bad conductor of electricity?

Answer: Air is a poor conductor of electricity.

Question 6: What would happen if air were a good conductor of electricity?

Answer: If air were a good conductor of electricity, there would be a high risk of electrical accidents and short circuits, as electricity could easily flow through the air between conductors.

Question 7: Out of aluminium foil, paper, dry cloth, and rubber sheet, which is the good conductor? Tell by using a torch.

Answer: Aluminum foil is a good conductor of electricity. This can be demonstrated by touching one end of the foil to the positive terminal of a battery and the other end to the bulb’s base, causing the bulb to light up.

Question 8: Give some uses of conductors and insulators.

Answer: Conductors are used in electrical wiring, power lines, and electronic components. Insulators are used to coat wires, insulate buildings, and protect against electric shocks.

Question 9: What is a “conduction tester”?

Answer: A conduction tester is a device used to test whether a material is a conductor or an insulator by passing an electric current through it. If the material conducts electricity, the tester will indicate a circuit, and if it does not, the tester will not indicate a circuit.

### Extra Multiple Choice Questions (MCQs) for Class 6 Science Chapter 12 Electricity and Circuits

Question 1: Which of the following materials is a good conductor of electricity?

A) Plastic
B) Wood
C) Copper
D) Glass

Question 2: What is the purpose of using an insulator in an electrical circuit?

A) To allow the flow of electricity
B) To prevent the flow of electricity
C) To increase the voltage
D) To decrease the current

Answer: B) To prevent the flow of electricity

Question 3: Why are metals such as copper and aluminum used in electrical wiring?

A) Because they are good insulators
B) Because they are easily available
C) Because they are good conductors
D) Because they are cheap

Answer: C) Because they are good conductors

Question 4: What happens when an electric current passes through a bulb filament?

A) The filament melts
B) The filament glows and produces light
C) The filament becomes magnetic
D) The filament becomes hot

Answer: B) The filament glows and produces light

Question 5: Which of the following is an example of a good insulator?

A) Aluminum
B) Rubber
C) Copper
D) Iron

Question 6: What is the function of a switch in an electrical circuit?

A) To increase the current
B) To decrease the voltage
C) To open or close the circuit
D) To regulate the flow of electricity

Answer: C) To open or close the circuit

Question 7: Why is it important to use insulated wires in electrical appliances?

A) To increase the resistance
B) To prevent electric shocks
C) To reduce the current
D) To improve the efficiency

Answer: B) To prevent electric shocks

Question 8: Which of the following materials is a poor conductor of electricity?

A) Silver
B) Copper
C) Aluminum
D) Plastic

Question 9: What is the purpose of a fuse in an electrical circuit?

A) To increase the current
B) To decrease the voltage
C) To prevent overheating and fires
D) To regulate the flow of electricity

Answer: C) To prevent overheating and fires

Question 10-: What happens if a circuit is broken?

A) The current stops flowing
B) The current flows faster
C) The voltage increases
D) The circuit becomes more efficient

Answer: A) The current stops flowing

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## FAQs on Extra Questions for Class 6 Science Chapter 12 Electricity and Circuits

### What is an electric circuit?

An electric circuit is a path through which electricity flows. It typically consists of a power source, wires, and a device that uses electricity, like a bulb or a fan.

### What are the 3 types of circuits?

The three types of circuits are series circuits, parallel circuits, and series-parallel circuits. In series circuits, components are connected in a single loop. In parallel circuits, components are connected in multiple paths. Series-parallel circuits combine aspects of both.

### What are the two types of electric circuit?

The two types of electric circuits are open circuits and closed circuits. In an open circuit, the path is broken, and electricity cannot flow. In a closed circuit, the path is complete, allowing electricity to flow.

### What is the SI unit of electric current?

The SI unit of electric current is the ampere, symbolized as A. It measures the rate of flow of electric charge in a circuit.

### What causes electricity?

Electricity is caused by the flow of electrons. When there is a difference in electric potential (voltage) between two points in a conductor, electrons move from the higher potential to the lower potential, creating an electric current.

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