G7-SCI-L10 Electric Current and its Effects
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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
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
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens to a wire when an electric current passes through it?
It becomes cold
It becomes magnetic
It becomes shorter
It becomes thicker
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
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
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
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
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is an electromagnet?
A type of battery
A type of switch
A type of wire
A coil of wire with an iron core
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of an electric bell?
To produce light
To produce sound
To produce heat
To produce magnetism
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
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
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