Grade 10 Physics: Magnetism Lecture Notes

A set of vocabulary flashcards covering the properties of magnets, magnetic fields, and the interaction between electricity and magnetism for Grade 10 students.

Magnetic Poles

The components of a magnet, specifically a north and a south pole, which exert forces on other magnets.

Like Poles

Magnetic poles of the same type that repel each other when brought close.

Permanent Magnet

A type of magnet made from iron, nickel, or cobalt that retains its magnetic properties even after the magnetizing force is removed.

Electromagnet

A magnet created by passing an electric current through a coil of wire wrapped around a metal core.

Natural Magnet

A magnet found in nature, such as lodestone.

Temporary Magnet

A magnet that can be easily magnetized and demagnetized, commonly used in applications like refrigerator doors and magnetic latches.

Cutting a Magnet

The process where a magnet is divided, resulting in each piece having both a north and a south pole.

Magnetic Field

The region where magnetic forces are exerted.

Magnetic Field Lines Direction

Outside a magnet, these lines go from the north pole to the south pole.

Straight Current-Carrying Conductor (Field Shape)

Magnetic field lines that form circular loops around the conductor.

Magnetic Field Line Strength

Indicated by proximity, where lines are strongest where they are closest together.

Moving Charge

An entity that can create a magnetic field, whereas a stationary charge cannot.

Earth's Magnetic Field (Cause)

Resulting from the movement of molten iron in the Earth's outer core.

Magnetic Field Lines vs. Electric Field Lines

Magnetic field lines form closed loops, while electric field lines start from positive charges and end on negative charges.

Compass

A device containing a magnetized needle that aligns itself with the Earth's magnetic field lines to determine direction.

Right-hand Rule

The rule used to determine the direction of the magnetic field around a current-carrying conductor.

Permeability of Free Space

A constant value given in the text as $4\times \text{pi} \times 107 \text{ T/m}$.

Interaction of Parallel Conductors (Same Direction)

Two conductors carrying current in the same direction will attract each other.

Magnetic Force (F) on a Wire

Calculated using the expression $F = ILB \times \text{sin}(\theta)$, where I is current, L is length, and B is the magnetic field.

Maximum Magnetic Force

Occurs when a current-carrying wire is perpendicular to the magnetic field.

Zero Magnetic Force

Occurs when a wire carrying a current (I) is placed parallel to a uniform magnetic field (B).

Interaction of Parallel Conductors (Opposite Direction)

Two wires carrying currents in opposite directions result in a repulsive magnetic force.