Let's solve the worksheet step by step and explain each answer.
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A. Choose the correct word to complete the statements.
1.
All magnets have ………… opposite poles.
✔ Answer: two
🔍 *Explanation:* Every magnet has two poles — a north pole and a south pole. You cannot have a magnet with just one pole (a magnetic monopole does not exist in nature).
2.
Same poles of two magnets will ………………… each other.
✔ Answer: repel
🔍 *Explanation:* Like poles (north-north or south-south) push away from each other — this is called repulsion.
3.
Opposite poles of two magnets will ………………… each other.
✔ Answer: attract
🔍 *Explanation:* Opposite poles (north and south) pull toward each other — this is attraction.
4.
The area around a magnet is called ………………… .
✔ Answer: magnetic field
🔍 *Explanation:* The space around a magnet where its magnetic force can be felt is known as the magnetic field.
5.
A magnet that is powered by electricity is called a/an ………………… .
✔ Answer: electromagnet
🔍 *Explanation:* An electromagnet is created when an electric current flows through a coil of wire, producing a magnetic field. It only works when electricity is flowing.
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B. True or False
6.
An electromagnet is an example of a permanent magnet.
✘ False
🔍 *Explanation:* Electromagnets are
temporary magnets — they only work when electric current flows through them. Permanent magnets retain their magnetism without needing electricity.
7.
You can increase the power of an electromagnet by adding more power source.
✔ True
🔍 *Explanation:* Increasing the voltage or current (i.e., using a stronger power source) increases the strength of the electromagnet.
8.
Cotton and paper are magnetic.
✘ False
🔍 *Explanation:* Cotton and paper are
non-magnetic materials — they are not attracted to magnets.
9.
Coiling the wires more will decrease the power of electromagnets.
✘ False
🔍 *Explanation:* More coils (turns of wire)
increase the magnetic field strength because each loop contributes to the overall magnetic field. So, more coils = stronger electromagnet.
10.
Electromagnets can be turned on and off.
✔ True
🔍 *Explanation:* Since electromagnets rely on electric current, turning the current on or off controls whether the magnet is active. This makes them very useful in devices like cranes, doorbells, and MRI machines.
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✔ Final Answers:
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A. Fill-in-the-blank
1. two
2. repel
3. attract
4. magnetic field
5. electromagnet
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B. True or False
6. False
7. True
8. False
9. False
10. True
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This worksheet helps reinforce basic concepts about magnets and electromagnets — great for science education! Let me know if you'd like a printable version or visual explanation.
Parent Tip: Review the logic above to help your child master the concept of electromagnet worksheet.
