# SCIENCEQ3G5M6 POSTTEST

## Quiz by CID Marikina

Science

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10 questions
• Q1

What does electro magnet consist of?

coil, battery, ball pen

iron core, battery, conductor

electric current, metals, switch

magnet, coil wire, dry cell

30s
S5FE-IIIi-j-9
• Q2

How can we increase the strength of the magnetic field of an electromagnet?

clip on the alligator clips

expose to more light

put more paper clips to pick up

add more copper wire to coil

30s
S5FE-IIIi-j-9
• Q3

Which of the following serves as core of electric current in an electromagnet?

battery

iron nail

thumbtacks

copper wire

30s
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• Q4

Which things at home would have an electromagnet?

steel cabinet

ironing stand

gas stove

electric fan

30s
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• Q5

Which material should we use to construct an electromagnet?

Use a silver spoon as core

Use abaca rope as wire.

Use yarn as wire.

Use a black crayon as core.

30s
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• Q6

What flows through the conductor or copper wire in an electromagnet?

light waves

heat energy

electric current

static electricity

30s
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• Q7

All of these help in strengthening the magnetic field of the electromagnet except one. Which one is it?

adding more dry cells as source

coiling more copper wire to the core

placing a bigger iron nail as core

using chopsticks as iron core

30s
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• Q8

What is a force of attraction or repulsion of magnetic materials due to the management of atoms?

Magnetism

Electricity

Circuit

Electromagnet

30s
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• Q9

The relationship between the strength of an electromagnet and the number of coils is directly proportional. This means that -----

As the number of coil increases, the strength of the electromagnet is still the same.

As the number of coil decreases, the strength of the electromagnet increases.

As the number of coil increases, the strength of the electromagnet increases.

As the number of coil increases, the strength of the electromagnet decreases.

30s
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• Q10

An electromagnet is surrounded by a coil of wire through which an electric current pass through. Which electromagnet can attract more pins?

30s
S5FE-IIIi-j-9

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