⚡ Quick Revision: Quick Definitions & Core Terms
Only magnetic substances are attracted by magnets. All metals are not magnetic.
Magnetism = Attraction of Magnetic Materials
- Symbols: Magnetic material = material attracted by magnet
- SI Unit: No numerical unit needed at this level
Magnetism questions in Class 6 are mostly concept-based. Focus on correct examples: iron, nickel, cobalt and steel.
Magnet attracts magnetic substances vs magnetic substance is the material attracted by a magnet.
M-A-M
Magnet Attracts Magnetic materials.
| Term | Quick Meaning | Example |
|---|---|---|
| Magnet | Attracts magnetic materials | 🔥 Bar magnet |
| Magnetic Substance | Attracted by magnet | Iron nail |
| Non-Magnetic Substance | Not attracted by magnet | Wood, plastic |
| Natural Magnet | Found in nature | Lodestone |
Do not write that every metal is attracted by a magnet. Copper, aluminium and gold are not magnetic.
Magnet → Attracts Iron, Nickel, Cobalt and Steel
- Use: To identify magnetic substances.
- Unit: No numerical unit needed.
- A magnet attracts magnetic materials.
- Magnetism is the property of attraction shown by a magnet.
- Iron, nickel, cobalt and steel are magnetic substances.
- Wood, plastic, rubber and glass are non-magnetic substances.
- Lodestone is a natural magnet.
⚡ Quick Revision: Magnetic and Non-Magnetic Materials
Iron, nickel, cobalt and steel are attracted by magnets. Copper, aluminium, wood, glass and plastic are not attracted by magnets.
Attracted by Magnet = Magnetic Material
- Symbols: Attracted = pulled by magnet; not attracted = non-magnetic
- SI Unit: No numerical unit needed at this level
For classification questions, check attraction first. If the object is attracted by a magnet, write magnetic.
Steel is magnetic because it contains iron vs aluminium is a metal but non-magnetic.
I-N-C-S
Iron, Nickel, Cobalt and Steel are magnetic.
| Material | Type | Exam Point |
|---|---|---|
| Iron | Magnetic | 🔥 Strongly attracted |
| Nickel | Magnetic | Attracted by magnet |
| Cobalt | Magnetic | Attracted by magnet |
| Steel | Magnetic | Contains iron |
| Wood / Plastic / Glass | Non-magnetic | Not attracted |
Do not classify copper and aluminium as magnetic just because they are metals. They are non-magnetic.
Magnetic Material = Attracted by Magnet
- Use: To classify materials in exam questions.
- Unit: No numerical unit needed.
- Magnetic materials are attracted by magnets.
- Non-magnetic materials are not attracted by magnets.
- Iron, nickel, cobalt and steel are magnetic.
- Wood, plastic, glass and rubber are non-magnetic.
- All metals are not magnetic.
⚡ Quick Revision: Poles and Properties of Magnets
A magnet always has two poles: north pole and south pole. A single magnetic pole cannot exist alone.
Like Poles Repel, Unlike Poles Attract
- Symbols: N = north pole, S = south pole
- SI Unit: No numerical unit needed at this level
Freely Suspended Magnet → North-South Direction
- Symbols: Free magnet = magnet allowed to rotate freely
- SI Unit: No numerical unit needed
For pole questions, check the poles first. N-N and S-S repel; N-S attract.
Like poles repel each other vs unlike poles attract each other.
L-R, U-A
Like poles Repel, Unlike poles Attract.
| Pole Combination | Result | Exam Point |
|---|---|---|
| N - N | Repulsion | 🔥 Like poles repel |
| S - S | Repulsion | Like poles repel |
| N - S | Attraction | Unlike poles attract |
| Freely Suspended Magnet | Points north-south | Used in compass |
Do not write that attraction proves both objects are magnets. A magnet can also attract magnetic substances like iron.
N-N Repel | S-S Repel | N-S Attract
- Use: To answer pole interaction questions.
- Unit: No numerical unit needed.
- A magnet has two poles: north and south.
- Magnetic force is strongest at the poles.
- Like poles repel each other.
- Unlike poles attract each other.
- A freely suspended magnet points in the north-south direction.
⚡ Quick Revision: Magnetic Field, Compass & Earth as a Magnet
Earth behaves like a huge magnet, so a freely suspended magnet points in the north-south direction.
Magnetic Field = Region of Magnetic Force
- Symbols: Field = area around magnet; force = attraction or repulsion
- SI Unit: No numerical unit needed at this level
Compass Needle → North-South Direction
- Symbols: N = north-seeking end; S = south-seeking end
- SI Unit: Direction has no unit in this chapter
For compass questions, remember: the needle itself is a tiny magnet and it points north-south.
Magnetic field is the region around a magnet vs magnetic field lines are imaginary lines used to show the field.
E-M-C
Earth acts like a Magnet, so Compass points north-south.
| Term | Meaning | Exam Point |
|---|---|---|
| Magnetic Field | Region of magnetic force | 🔥 Around a magnet |
| Field Lines | Imaginary lines | Show field direction |
| Compass | Direction-finding device | Has magnetic needle |
| Earth | Acts like a magnet | Makes compass work |
Do not write that a compass needle points randomly. It points north-south because Earth behaves like a magnet.
Earth Acts Like a Magnet → Compass Works
- Use: To explain compass direction.
- Unit: No numerical unit needed.
- Magnetic field is the region around a magnet where its force acts.
- Magnetic field lines are imaginary lines.
- A compass has a small magnetic needle.
- A compass needle points in the north-south direction.
- Earth behaves like a huge magnet.
⚡ Quick Revision: Making, Uses & Care of Magnets
Heating, hammering or dropping a magnet can weaken or destroy its magnetism.
Magnetic Substance + Magnetization → Magnet
- Symbols: Magnetic substance = iron or steel object
- SI Unit: No numerical unit needed at this level
Heat / Hammer / Drop → Loss of Magnetism
- Symbols: Heat, shock and rough handling can weaken magnets.
- SI Unit: No numerical unit needed.
This part is mostly application-based. Remember uses, care methods and causes of demagnetization.
Magnetization makes a magnet vs demagnetization removes magnetism.
H-H-D
Heating, Hammering and Dropping can demagnetize a magnet.
| Topic | Meaning / Use | Exam Point |
|---|---|---|
| Magnetization | Making a magnet | 🔥 Stroking method |
| Temporary Magnet | Loses magnetism easily | Soft iron |
| Permanent Magnet | Keeps magnetism long | Steel magnet |
| Uses | Compass, door catch, speakers | Daily life applications |
Magnets should be stored carefully with keepers. Rough handling can reduce their strength.
Magnetization = Making a Magnet
Demagnetization = Loss of Magnetism
- Use: To answer making, care and safety questions.
- Unit: No numerical unit needed.
- Magnetization is the process of making a magnet.
- Temporary magnets lose magnetism easily.
- Permanent magnets keep magnetism for a long time.
- Heating, hammering and dropping can demagnetize magnets.
- Magnets are used in compass, speakers, fridge doors and magnetic toys.
⚡ Quick Revision: Final Recall Sheet & Exam Readiness
A magnet attracts magnetic materials and always has two poles: north pole and south pole.
Magnet → Attracts Iron, Nickel, Cobalt and Steel
Like Poles Repel, Unlike Poles Attract
Compass Needle → North-South Direction
- Symbols: N = north pole, S = south pole
- SI Unit: No numerical unit needed at this level
Magnetism is mostly rule-based. Remember material examples, pole rules and compass direction.
| Topic | Must Remember | Example |
|---|---|---|
| Magnet | 🔥 Attracts magnetic materials | Bar magnet |
| Magnetic Materials | Iron, nickel, cobalt, steel | Iron nail |
| Poles | North and south poles | N and S ends |
| Compass | Points north-south | Direction finding |
| Demagnetization | Loss of magnetism | Heating, hammering |
Attraction can happen between a magnet and iron vs repulsion is the sure test for magnetism between two magnets.
Do not write that all metals are magnetic. Copper and aluminium are metals but non-magnetic.
I-N-C-S + L-R-U-A
Iron, Nickel, Cobalt, Steel + Like Repel, Unlike Attract.
Magnet → Magnetic Materials → Poles → Magnetic Field → Compass → Uses and Care
Magnetic Materials = Iron + Nickel + Cobalt + Steel
N-N Repel | S-S Repel | N-S Attract
- Use: Material classification and pole interaction questions.
- Unit: No numerical unit needed.
- A magnet attracts iron, nickel, cobalt and steel.
- A magnet has north and south poles.
- Like poles repel and unlike poles attract.
- A compass needle points north-south because Earth acts like a magnet.
- Heating, hammering and dropping can demagnetize magnets.