Circuits

How do you represent components in a circuit?

• Using emojis
• Writing in long paragraphs
• Using only verbal descriptions
• Using symbols or drawings

How can the performance of components in a circuit be changed?

• Changing the color of the components
• Adding more components to the circuit
• Adjusting voltage, current, resistance, or capacitance values
• Using components made of different materials

How does the length of the wire in a circuit affect the brightness of the bulb?

• The brightness of the bulb is not affected by the length of the wire in the circuit.
• The brightness of the bulb decreases as the length of the wire in the circuit increases.
• The brightness of the bulb increases as the length of the wire in the circuit increases.
• The brightness of the bulb remains constant regardless of the length of the wire.

How do you compare electrical conductors and electrical insulators?

• Electrical conductors prevent the flow of electricity
• Electrical insulators are used to enhance electrical conductivity
• Electrical conductors are always transparent
• Electrical conductors allow the flow of electricity, while electrical insulators do not.

Why are metals used for cables and wires?

• Metals are lightweight and flexible.
• Metals have high electrical conductivity.
• Metals have low electrical conductivity.
• Metals are easily biodegradable.

Why are plastics used to cover wires and for plugs and switches?

• Plastics conduct electricity better than other materials.
• Plastics are insulators that protect against electric shocks and prevent short circuits.
• Plastics are more expensive than other materials.
• Plastics are biodegradable and environmentally friendly.

Why can mains electricity be dangerous?

• Static electricity
• Short circuit
• High voltage levels
• Low voltage levels

What is resistance?

• Resistance is the assistance to the flow of electric current.
• Resistance is the absence of electric current flow.
• Resistance is the enhancement of electric current flow.
• Resistance is how easily electricity passes through materials in a circuit.

How do different materials have different levels of resistance?

• Materials have different levels of resistance based on their atomic structure and the flow of electrons.
• Materials have different levels of resistance because of their smell and taste.
• Materials have different levels of resistance based on their weight and size.
• Materials have different levels of resistance due to their color and texture.

How can you change the resistance in a circuit?

• Add more batteries in series
• Increase the temperature of the circuit
• Turn the control of the variable resistor

• Change the color of the wires