Table of Contents
Magnetic fields govern a class of physical properties known as magnetism. A magnetic field is produced by electric currents and the magnetic moments of elementary particles, which operate on other currents and magnetic moments.
Temperature, pressure, and the applied magnetic field influence a material’s magnetic state (or magnetic phase). As these variables alter, a material may exhibit multiple forms of magnetism. Although the exact mathematical relationship between strength and distance varies, the intensity of a magnetic field almost always decreases with distance.
A Brief outline
Electromagnetism is a complex peculiarity that incorporates attraction. The most notable impacts happen in ferromagnetic materials, which are profoundly drawn to attractive fields and can be charged to become super durable magnets that create attractive fields. Demagnetizing a magnet is additionally achievable.
Important Concepts
Magnetism properties
Magnetism is a property of the combined electromagnetic force. It has to do with certain magnet force phenomena, such as items that create fields that repel or attract other objects. A magnet is defined as an item that, unlike poles, can generate and attract magnetic fields while repelling them.
- A magnet’s basic qualities are as follows:
- When a magnet is dipped in iron filings, we can see that the iron filings attach to the magnet’s end because the magnet’s attraction is greatest there. Magnet poles are the names given to these ends.
- Magnetic poles always are encountered in groups of two.
- When a magnet is hanging in mid-air, it will always point north-south. The North Pole is the pole pointing to the geographic north, whereas the South Pole is the pole pointing to the geographic south.
- Poles that repel, as opposed to poles that attract.
- The magnetic force between these two magnets is stronger when the distance between them is smaller.
A ferromagnetic material, such as an iron nail, can be used. Connect a wire to the battery or a power source by winding it around this nail. This setup now acts like a magnet as the current flows through the winding.
Significance of magnetism in IIT JEE exam
Because the weighting for magnetism in the chapter is usually comparable between years, we may estimate that the magnetic effect of current and magnetism is around 6.66 percent. As a reason, the total number of questions from this chapter is expected to be in the range of 3 to 4 in total.
FAQs
Is it possible to have magnetism without having electricity?
No, magnetism is impossible to achieve without electricity. Consider a rod with a wire wound around it that is stationary; it will not generate magnetism. This setup, on the other hand, acts like a magnet when the battery powers it.
Is it possible to power a light bulb with a magnet?
No! Because the current created by a magnet across a single wire is insufficient to light a bulb, an additional method of generating more power in a specific amount of time is required.
How does magnetic induction work, and what is it?
When a magnetic field and a current-carrying conductor trip relative to one another, electromagnetic induction occurs.
