Middle School: 6th, 7th and 8th Grade - Science - Electrical Conductors And Insulators Solution - MCQGeeks.com

Q.1.

Why are insulators important in an electrical circuit?

100%
They make the circuit safe to touch
0%
Electricity will only flow through insulators
0%
Light bulbs and buzzers are only made of insulating materials
0%
All of the above

Q.2.

Why are electrical plugs made of plastic?

25%
Plastic is stronger than all other materials
25%
Plastic is a good electrical conductor
25%
Plastic protects people from electricity
25%
Only plastic can be made into the right shape for a plug

Q.3.

Which of these is a good electrical conductor?

0%
Water
0%
Sweat
0%
The human body
100%
All of the above

Q.4.

Which of these is an electrical insulator?

0%
Wood
100%
Plastic
0%
Silver
0%
Glass

Q.5.

In a complete electrical circuit, which materials does electricity flow through?

100%
Electrical insulators
0%
Electrical conductors
0%
Only leads or wires
0%
Only batteries

Q.6.

The filament in a light bulb glows because of the material's resistance. What does this mean?

100%
The filament does not allow the flow of electricity
0%
The filament speeds up the flow of electricity
0%
The filament slows down the flow of electricity
0%
The filament gets annoyed with the electricity

Q.7.

Which of these is an electrical conductor?

100%
Gold
0%
Copper
0%
Aluminium
0%
Rubber

Q.8.

A material which is an electrical insulator does what?

100%
It does not allow electricity to pass through it easily
0%
It does not allow heat to travel through it easily
0%
It allows heat to travel through it easily
0%
It allows electricity to pass through it easily

Q.9.

A material which is an electrical conductor does what?

100%
It does not allow electricity to pass through it easily
0%
It does not allow heat to travel through it easily
0%
It allows heat to travel through it easily
0%
It allows electricity to pass through it easily

Q.10.

Which of these could be used to complete an electrical circuit?

100%
A piece of gravel
0%
A rubber
0%
A crayon
0%
A pair of scissors