Magnetism & Electromagnetism Flashcards
To understand and apply the principles of energy transfers, conservation of energy, and efficiency, as well as the mechanisms of thermal energy transfer, the concept of work and power, and different energy resources. This knowledge will be used to solve problems and analyze real-world applications, aligning with the Pearson Edexcel International GCSE Physics syllabus.
What is MAGNET?
A magnet is an object that produces a magnetic field, attracting materials
What are MAGNETIC MATERIALS?
1.iron
2.Nickel
3.cobalt
What is MAGNETISM ?
Magnetism is the force of attraction or repulsion that acts between magnetic materials
What are HARD MAGNETS?
These materials are difficult to magnetise but retain their magnetism for a long time.
What are SOFT MAGNETS?
These materials are easily magnetised and demagnetised.
What is a MAGNETIC POLE?
Magnetic poles are the parts of a magnet that exert the greatest force.
What is MAGNETIC FIELD LINE?
A magnetic field line is a visual representation of the magnetic field around a magnet or current-carrying conductor.
Function of MAGNETIC FIELD LINE
These lines indicates,
direction
Strength
How is magnetism INDUCED in materials when they are PLACED IN A MAGNETIC FIELD?
EXPOSURE TO THE MAGNETIC FIELD
When a material is placed in a magnetic field, the external field interacts with the magnetic domains within the material.
How can you investigate the magnetic field pattern for a permanent bar magnet and between two bar magnets using PLOTTING COMPASSES ?
1.PLACE THE MAGNET
Position the bar magnet on a flat surface.
2.USE THE PLOTTING COMPASSES
Place the plotting compass at various points around the magnet. The compass needle will align with the local magnetic field direction.
3.RECORD THE DIRECTIONS
Note the direction in which the compass needle points at each location.
4.DRAW THE FIELD LINES
Place the bar magnet on a flat surface and cover it with a sheet of paper or transparent plastic.
Sprinkle iron dust or iron filings evenly over the paper/plastic.
Gently tap the surface to help the iron dust align with the magnetic field.
Observe the pattern of the iron dust, which will show lines emerging from the north pole and curving around to the south pole, revealing the magnetic field pattern.
How to use two permanent magnets to produce a UNIFORM MAGNETIC field pattern?
MAGNETIC FIELD INTERACTION BETWEEN 2 BAR MAGNETS
The fields from each magnet combine and overlap in the region between them.
FIELD LINE FORMATION
The magnetic field lines extend from the north pole of one magnet to the south pole of the other, forming parallel lines between the magnets.
What is Earthโs MAGNETIC field?
Earthโs magnetic field is a protective magnetic shield created by the movement of molten iron in the Earthโs core, extending from the planetโs interior into space.
Describe the RELATIONSHIP between ELECTRIC CURRENT and MAGNETIC FIELDS?
When an electric current flows through a conductor, it produces a magnetic field around it, which is a fundamental principle of electromagnetism.
What is a ELECTROMAGNET?
An electromagnet is a type of magnet where the magnetic field is produced by an electric current, typically consisting of a coil of wire wound around a ferromagnetic core.