Here is a comprehensive list of extra questions and answers for Chapter 4: Exploring Magnets by Bodhiclasses. These are ideal for revision, assessments, quizzes, and exam preparation. The questions are aligned with NCERT curriculum concepts and include varied formats to test understanding at multiple levels.
True or False Questions (1 Mark Each)
- All metals are magnetic.
False - A magnet always has two poles.
True - Plastic is a magnetic material.
False - A freely suspended magnet always points in the north-south direction.
True - A bar magnet attracts iron, nickel, and cobalt.
True - Breaking a magnet in half results in two magnets, each with one pole.
False - The poles of a magnet are located at the center.
False - The Earth behaves like a giant magnet.
True - Like poles of a magnet attract each other.
False - A magnetic compass is used to measure temperature.
False - Magnets can attract objects without touching them.
True - Iron is a non-magnetic material.
False - Compass needles are painted red to indicate the South pole.
False - Artificial magnets can be made in different shapes.
True - A magnetic field can pass through plastic and glass.
True - Magnetism is stronger at the ends of a bar magnet.
True - The Matsya Yantra is an ancient Indian magnetic device.
True - A compass needle can rotate freely to show directions.
True - Only bar magnets exist; other shapes are not useful.
False - Non-magnetic materials like wood can block magnetism completely.
False
One-Mark Questions with Answers
- What is a magnet?
An object that attracts iron and other magnetic materials. - Name any two magnetic materials.
Iron and cobalt. - Name any two non-magnetic materials.
Plastic and rubber. - Where is the magnetic force the strongest in a bar magnet?
At the two ends (poles). - What are the two poles of a magnet called?
North pole and South pole. - What happens when like poles are brought near each other?
They repel each other. - What device helps us find directions using magnetism?
Magnetic compass. - What is the red end of a compass needle called?
North-seeking pole (North pole). - Name a naturally occurring magnet.
Lodestone. - Can a magnet be made using a sewing needle?
Yes. - What is the Earth’s role in using a compass?
The Earth behaves like a magnet, aligning the compass. - How many poles does a magnet have?
Two poles. - What is the Matsya Yantra?
An ancient Indian magnetic navigation device. - Name one shape of an artificial magnet.
U-shaped magnet. - What is the property of a magnet that helps identify magnetic materials?
Attraction. - What property of magnets is used to distinguish them from iron?
Repulsion. - Which type of poles attract each other?
Unlike poles. - What happens to a compass needle near a magnet?
It gets deflected. - Can magnetic fields pass through glass?
Yes. - What is the function of a magnetic compass?
To indicate the north-south direction.
Two-Mark Conceptual Questions with Answers
- Question: Why do iron filings stick more at the poles of a magnet?
Answer: Magnetic force is strongest at the poles, so iron filings are more attracted to those areas. - Question: What will happen if you suspend a bar magnet freely and rotate it?
Answer: It will settle pointing in the north-south direction due to Earth’s magnetic field. - Question: How can you magnetize a sewing needle using a bar magnet?
Answer: Rub the bar magnet along the needle in one direction about 30–40 times. The needle becomes magnetized. - Question: How can you distinguish between a magnet and a magnetic material?
Answer: Only magnets show repulsion with like poles. Magnetic materials will only be attracted. - Question: What are the uses of magnets in everyday life?
Answer: Used in compasses, fridge doors, toys, and electronic devices like speakers. - Question: Can a magnet be used to find direction at sea? How?
Answer: Yes, using a magnetic compass that aligns with Earth’s magnetic field to show direction. - Question: Why is a compass needle painted red at one end?
Answer: To indicate the North-seeking pole for easy identification of direction. - Question: State two differences between magnetic and non-magnetic materials.
Answer: Magnetic materials are attracted to magnets; non-magnetic are not. Magnetic materials include iron; non-magnetic include plastic. - Question: What will happen if a wooden piece is placed between a magnet and a compass needle?
Answer: There will be no effect; magnetic force passes through non-magnetic materials like wood. - Question: Why do magnets come in different shapes?
Answer: Different shapes are designed for different applications like lifting, attraction, or alignment.
Applied Knowledge and Creative Thinking Questions
- Question: Design a magnetic treasure hunt game for your classroom using bar magnets and iron pins. Explain the rules.
Answer: Hide iron pins in paper envelopes. Students use bar magnets to locate the hidden treasure without opening the envelopes. Fastest wins. - Question: Suggest a way to retrieve metal keys dropped into a narrow water pipe using your knowledge of magnets.
Answer: Tie a strong magnet to a string and lower it into the pipe. The keys will stick to the magnet and can be pulled out. - Question: If you had to build a mini magnetic car that moves without touching it, how would you do it?
Answer: Fix a magnet on the car and use another magnet of opposite poles to attract or like poles to repel and push it forward. - Question: How would you prove to a friend that Earth is a giant magnet using only a compass?
Answer: Suspend a compass and show how it always aligns in the same direction—north-south—regardless of location, due to Earth’s magnetic field. - Question: Design a classroom experiment to show how magnetism can pass through non-magnetic materials.
Answer: Place a magnet under a cardboard sheet. Put paperclips on top. Move the magnet and observe paperclips move, proving the field passes through cardboard.
