The strength of a magnetic field decreases with distance from the source.
Magnetic fields can be represented using field lines or vectors.
A current-carrying wire produces a magnetic field around it, with the direction determined by the right hand rule (thumb points in the direction of the current, fingers curl around the wire).
The strength of a magnetic field can be indicated by the density of the field lines.
Magnetic field lines never cross or intersect.
Magnetic field lines are imaginary lines that surround a magnetic field and indicate the direction of the field at any point.
The magnetic field lines are perpendicular to the direction of motion.
The strength of a magnetic field is determined by the density of the magnetic field lines, with a higher density indicating a stronger magnetic field and a lower density indicating a weaker magnetic field.
Magnetic fields are created by moving charges or current-carrying wires.
Field lines are imaginary lines that show the direction and intensity of a magnetic field, with closer lines indicating stronger fields.
Vectors represent the magnitude and direction of a force at any point in space.
A compass needle is used to measure the direction of a magnetic field by aligning it along the field lines.
Electric charges moving through a conductor produce a magnetic field that is perpendicular to both the motion of the charge and the direction of the electric field.
When two parallel wires carry equal currents in opposite directions, they attract each other due to their magnetic fields.
Moving charged particles create a magnetic field, which can interact with other magnets or magnetic materials.
Field lines are perpendicular to the surface where they enter/exit.
Field lines are always perpendicular to the surface where they enter/exit.
Electric charges produce electric fields that exert forces on other charged objects.
Field lines always start on north poles and end on south poles.
Stronger magnets have more tightly packed field lines.
If the charge is positive, the force will always act towards the left side of the diagram.
In a uniform magnetic field, the force acting on a charged particle is constant and parallel to the magnetic field lines.
Electrically charged particles create their own magnetic field around them.
A compass needle aligns itself along the direction of the magnetic field due to its own small magnetization.
When a bar magnet is suspended freely, it aligns itself along a North-South axis due to Earth's magnetic field.
Like poles repel each other while unlike poles attract each other.
The magnetic field lines are denser near the poles of the magnet and become less dense as distance increases.
The magnetic field lines always form closed loops, starting from one end of the magnet and returning back to where they started.
The direction of the magnetic field is represented by the direction of the arrow on the magnetic field line.
A vector can be represented as an arrow pointing in the direction of the force and having a length proportional to its magnitude.
Electric charge can be positive (+) or negative (-).
Charge is conserved - it cannot be created or destroyed, only transferred from one object to another.
Moving charges create a magnetic field around them due to their velocity.
Current flowing through a wire creates a magnetic field around it.
The right hand rule can be used to determine the direction of the magnetic field produced by a current carrying wire.
The magnetic field produced by the coil strengthens when the current increases and weakens when the current decreases.
An electromagnet can be made by wrapping a coil around an iron core and passing a current through it.
When the current flows through the coil, the magnetic field lines are concentrated at the centre of the coil, creating a strong magnetic field that attracts nearby ferrous objects.
Magnetic fields have lines of force that show the strength and direction of the magnetic field at any point.
Magnetic fields are measured using a compass needle which aligns with the lines of flux (magnetic field lines).