G7-SCI-L10 Electric Current and its Effects

What is the purpose of using symbols to represent electric components?

• To make the circuit diagram easier to draw
• To make the circuit diagram more colorful
• To confuse people who are not familiar with electric circuits
• To save space on the circuit diagram

What happens to a wire when an electric current passes through it?

• It becomes cold
• It becomes magnetic
• It becomes shorter
• It becomes thicker

What is the purpose of an electric fuse?

• To prevent fires and damage to electric appliances
• To make the circuit diagram look more interesting
• To increase the flow of electric current
• To make the wire melt and break

What is the heating effect of electric current?

• When a wire becomes cold
• When a wire becomes shorter
• When a wire becomes thicker
• When a wire gets hot

What is an electromagnet?

• A type of battery
• A type of switch
• A type of wire
• A coil of wire with an iron core

What is the purpose of an electric bell?

• To produce light
• To produce sound
• To produce heat
• To produce magnetism

What is the advantage of using LED bulbs over incandescent bulbs?

• LED bulbs consume less electricity
• LED bulbs produce more heat
• LED bulbs are more expensive
• LED bulbs are less durable

What is the purpose of using a circuit diagram?

• To confuse people who are not familiar with electric circuits
• To save space on the circuit diagram
• To make the circuit diagram more colorful
• To represent an electric circuit in a simplified way

What happens to the iron strip in an electric bell when the circuit is completed?

• It becomes cold
• It becomes magnetic
• It becomes shorter
• It becomes thicker

What is the purpose of an electric fuse?

• To prevent fires and damage to electric appliances
• To make the circuit diagram look more interesting
• To increase the flow of electric current
• To make the wire melt and break