Fields & Force
this area around a magnet shows where magnetic forces act and the direction a compass needle would point.
what is a magnetic field?
This type of electrical current flows in one constant direction, typically supplied by batteries and used in most electronic devices.
What is direct current?
These areas at the ends of a magnet concentrate field lines, causing the strongest interactions between magnets.
What are magnetic poles?
Measured in volts, it represents the work done per unit charge to move that charge between two points in an electric field.
What is voltage?
Copper and aluminum are common examples of this type of material, which allows electric charges to flow easily.
What is a conductor?
this invisible region around a charged object describes how it pushes or pulls on other charges nearby.
what is an electric field?
Unlike DC, this current changes direction repeatedly.
What is alternating current?
Used in devices like relays and MRI machines, this magnet relies on current-generated magnetic fields rather than permanent magnetic materials.
What is an electromagnet?
This term, synonymous with voltage, describes the difference in electric potential energy per unit charge between two points in a circuit.
What is potential difference?
Rubber and glass are examples of this type of material that resists the flow of electric charge.
What is an insulator?
this term describes a region inside a material where many atomic magnets line up in the same direction, creating a stronger overall magnetic effect.
These two circuit types differ by having either one path for current or multiple paths.
What are series and parallel circuits?
It’s the name for producing electricity by moving a wire through a magnetic field.
What is induction?
Named after a French physicist, this SI unit measures the rate of flow of electric charge in a circuit
What is an ampere?
This circuit component limits the flow of electric current and is measured in ohms.
What is a resistor?
This unit, named for an Italian scientist, measures electric potential difference—essentially the “push” behind an electric current
What is a volt?
This unit of electrical resistance is named after the scientist who formulated the relationship between voltage, current, and resistance.
What is an ohm?