Electricity and Circuits: Class 6 Science Q&A
25 free answers on Electricity and Circuits (Science) for Class 6 students, across CBSE, ICSE and State boards. Includes questions such as “What is a fused bulb?”, “Name two insulators and two conductors.”, “Name some devices in which electric cells are used.”
Question & Answer
Questions
- ScienceClass 6CBSE
What is a fused bulb?
A fused bulb is a bulb that does not glow anymore because its filament is broken. Inside an electric bulb, there is a thin wire called a filament that heats up and produces light when current passes through it. If the filament breaks due to overheating or long use, the circuit inside the bulb is broken, and it stops glowing. Such a bulb is called a fused bulb.
- ScienceClass 6CBSE
Name two insulators and two conductors.
Insulators: Plastic Rubber Conductors: Aluminum Copper
- ScienceClass 6CBSE
Name some devices in which electric cells are used.
Electric cells are used in many portable devices. Some examples include: Portable radio – Uses cells to operate without direct power supply. Camera – Requires cells or batteries for functioning. Wrist watch – Small button cells are used to run the watch. Torchlight – Uses el
- ScienceClass 6CBSE
What are insulators? Give one example.
Insulators are materials that do not allow electric current to pass through them easily. They have tightly bound electrons that do not move freely. Insulators are used to protect us from electric shocks and to cover electrical wires. Examples: Rubber, plastic, wood, glass.
- ScienceClass 6CBSE
Name two devices which work on electricity.
Many devices operate using electricity. Two common examples are: Fan – It converts electrical energy into mechanical energy to produce airflow. Electric bulb – It converts electrical energy into light energy.
- ScienceClass 6CBSE
Why do we get an electric shock?
We get an electric shock because the human body is a good conductor of electricity. When our body comes in contact with a source of electricity, current can pass through it. This flow of current interferes with the normal functioning of our nerves and muscles, which causes a shock. The severity of the shock depends on the amount of current, voltage, and duration of contact.
- ScienceClass 6CBSE
How does an electric cell produce electricity?
An electric cell produces electricity from the chemical energy stored inside it. Inside the cell, chemical reactions take place, which create a difference in electric potential between the two terminals. This potential difference causes electric charges to move, producing an electric current when the circuit is completed.
- ScienceClass 6CBSE
What are conductors?
Ans: Conductors are materials that allow electric current to pass through them easily. They have free electrons that move freely when electricity is applied. Metals are generally good conductors of electricity. Examples: Copper, aluminum, iron, etc.
- ScienceClass 6CBSE
An electric cell has how many terminals?
An electric cell has two terminals—a positive terminal (+) and a negative terminal (–). These terminals help in the flow of electric current through a circuit. The electric current flows from the positive terminal to the negative terminal through the external circuit.
- ScienceClass 6CBSE
What is a switch?
A switch is a simple electrical device that is used to either complete or break an electric circuit. When the switch is in the “ON” position, it allows electric current to flow through the circuit, and the device connected to it starts working. When it is in the “OFF” position, the circuit is broken, and the current stops flowing. Switches are commonly used in homes to control lights, fans, and other appliances.
- ScienceClass 6CBSE
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.
The possible reasons for torch to not function could be The switch may be The cells may not be placed in the correct The cells may have been used The filament may be fused in the
- ScienceClass 6CBSE
Paheli wanted to glow a torch bulb using a cell. She could not get connecting wires, instead, she got two strips of aluminium foil. Will she succeed? Explain, how?
Yes, Paheli will succeed. Aluminium foil being a good conductor of electricity it can be used as connecting wires for supply of electricity.
- ScienceClass 6CBSE
A fused bulb does not glow. Why?
A fused bulb does not glow since the filament inside it is broken and the circuit is incomplete.
- ScienceClass 6CBSE
Why do bulbs have two terminals?
Solution: A bulb has a tiny thin wire called filament which consists of two terminals to connect the filament within the circuit so that current can pass through it.
- ScienceClass 6CBSE
When the chemicals in the electric cell are used up, the electric cell stops producing electricity. The electric cell is then replaced with a new one. In case of rechargeable batteries (such – as the type used in mobile phones, camera and inverters), they are used again and again. How?
Solution: Rechargeable batteries can be recharged by providing them appropriate current through secondary cells or storage cells.
- ScienceClass 6CBSE
Paheli is running short of connecting wires. To complete an electric circuit, she may use a (a) glass bangle (b) thick thread (c) rubber pipe steel spoon
Solution: (d): steel spoon Steel spoon is a good conductor of electricity. Hence we use steel spoon to complete an electric circuit.
- ScienceClass 6CBSE
1. Filament of a torch bulb is (a) a metal case (b) metal tip at the centre of the base (c) two thick wires a thin wire
Solution: (d): a thin wire
- ScienceClass 6CBSE
In an electric bulb, light is produced due to the glowing of (a) the glass case of the bulb (b) the thin filament (c) the thick wires supporting the filament (d) gases inside glass case of the bulb.
Solution: : the thin filament
- ScienceClass 6CBSE
Choose the incorrect statement. (a) A switch is the source of electric current in a circuit. (b) A switch helps to complete or break the circuit. (c) A switch helps us to use electricity as per our requirement. When the switch is open there is an air gap between its terminals.
Solution: : A switch is the source of electric current in a An electric cell is the source of electric current in a circuit not the switch.
- ScienceClass 6CBSE
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