Science Grade 6: Light and Electricity

Electrical Circuits

• Elements of an electric circuit include a switch, which allows you to either make or break the circuit; a conductor of electricity (like metals or graphite), which allows the flow of electricity; and an insulator (like plastics, paper, rubber, or wood), which doesn't.
• A switch is a device used to control whether current flows through a circuit.
• Conductors allow electric current to flow easily.
• Insulators prevent the flow of electric current.
• Safety precautions need to be taken to prevent electric shocks.

Objective Type Questions

• Conductors of Electricity: An eraser, a plastic ruler, an iron nail, or a plastic jug; choose the correct answer from the options
• Appliances not run by Electricity: Identify the appliance that isn't powered by electricity from the given options. Identify which appliances are not powered by electricity.

Energy Conversion in a Cell

• Chemical energy in an electric cell is converted into electrical energy.

Electric Current and Circuit Components

• Electricity in motion is called current.
• A bulb is an electrical appliance.
• A circuit is the pathway for electrons to flow via a conductor.
• An electric switch is a device that opens or closes an electric circuit.
• Plastic and rubber are used to cover electrical wires.

Subjective Type Questions (Very Short Answer)

• Electric Current: Briefly describe the concept of electric current.
• Torch: Briefly define a torch.
• Open Circuit: Explain the condition when a circuit is open.
• Insulator: Define an insulator.

Subjective Type Questions (Short Answer)

• Electric Circuit: Explain the concept of an electric circuit.
• Closed Circuit: Explain the concept of a closed circuit.
• Battery: Describe what a battery is.
• Elements of Electric Current: List the components of an electric circuit.
• Insulation of Wires: Explain why electric wires are insulated.

Subjective Type Questions (Long Answer)

• Bulb Lighting Diagram: Draw a diagram illustrating how a bulb lights up with an electric cell, and explain its operation.
• Electric Circuit Diagram: Draw an electric circuit and its working.
• Insulators and Conductors: Explain the difference between insulators and conductors, and provide three examples of each.

Light and Shadow - Objective Questions

• Artificial Light Source: Identify which of the listed objects is not an artificial light source.
• Non-Luminous Objects: Identify which of the items listed are non-luminous.
• Weak Shadow Casting Object: Identify the object from the list that creates a weak shadow.
• Transparent Objects: Identify which object from the list is transparent.

Light and Shadow - Fill in the Blanks

• Source of Light: The natural source of light is given.
• Light Propagation: The manner in which light travels in straight lines is identified.
• Pinhole Camera Principle: Identify the principle behind a pinhole camera.
• Mirrors in Signaling: The application of mirrors in signaling by armed forces is stated.

Light and Shadow - True/False

• Shadows: State whether shadows can be seen in the dark.
• Sun: State whether the sun is a luminous object.
• Light Travel: Explain whether light travels in straight lines.
• Shadow Shape: State whether the shape of a shadow is identical to the object.
• Translucent Object: State whether glass is a translucent object.

Subjective Type Questions (Light and Shadow)

• Light Definition: Define what light is.
• Translucent Objects: Define translucent objects and give examples.
• Pinhole Camera: Explain what a pinhole camera is. -
• Object Definition: Define what an object is.
• Mirror Use: Give the use of a plane mirror.

Subjective Type Questions (Short and Long Answer - Light and Shadow)

• Translucent objects: Define translucent objects and provide examples.
• Shadow Formation: Explain when a shadow is formed.
• Light Propagation: Explain rectilinear propagation of light.
• Pinhole Camera Principle: Explain the principle on which a pinhole camera is based.
• Non-Luminous Objects: List non-luminous objects.
• Pinhole Camera in Nature: Explain the existence of pinhole cameras in nature.
• Light Travel Explanation: Explain the experiment that shows light travels in straight lines.
• Image vs Shadow: Explain the difference between an image and a shadow.
• Reflection of Light Definition: Define reflection of light.
• Working of Periscope: Provide a note on the working of a periscope.