Electromagnetism Terms

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Instructions: Charge up your vocabulary with the science of electricity and magnetism, from circuits and currents to electromagnetic waves and fields.

1.
What is an 'electromagnetic wave'?
A
A sound wave amplified by a speaker
B
A vibration in solid metal
C
A wave consisting of oscillating electric and magnetic fields that can travel through a vacuum
D
A water wave created by a magnet
2.
What does 'voltage' measure?
A
The flow of electrons
B
The power consumed by a device
C
The resistance in a wire
D
The electrical potential difference between two points, which drives current through a circuit
3.
What is 'current' in electricity?
A
The resistance of a wire
B
The voltage in a battery
C
The flow of electric charge through a conductor, measured in amperes
D
The power of a motor
4.
What does 'Ohm's Law' describe?
A
The attraction between magnets
B
The creation of electromagnetic waves
C
The speed of light
D
The relationship between voltage, current, and resistance: V = IR
5.
What is a 'capacitor'?
A
A device that generates electricity
B
A component that stores electrical energy in an electric field
C
A type of battery
D
A wire that conducts electricity
6.
What is 'resistance' in an electrical circuit?
A
The opposition to the flow of electric current, measured in ohms
B
The speed of electron flow
C
The brightness of a light bulb
D
The amount of charge stored
7.
What is an 'electromagnet'?
A
A magnet created by passing electric current through a coil of wire
B
A type of compass
C
A naturally occurring magnetic rock
D
A permanent magnet
8.
What does 'induction' mean in electromagnetism?
A
Connecting a battery to a circuit
B
The heating of a wire
C
The storage of energy in a battery
D
The generation of an electric current by a changing magnetic field
9.
What is a 'conductor'?
A
A material that blocks electricity
B
A device that measures voltage
C
A type of battery
D
A material that allows electric current to flow through it easily
10.
What is the 'electromagnetic spectrum'?
A
A type of prism
B
The entire range of electromagnetic radiation, from radio waves to gamma rays
C
A measurement of magnetic strength
D
The visible colors of the rainbow only
11.
What is a 'transformer'?
A
A switch in a circuit
B
A type of generator
C
A motor that converts electricity to motion
D
A device that changes the voltage of alternating current electricity
12.
What does 'alternating current' (AC) mean?
A
Current from a battery
B
Current that flows in one direction only
C
Electric current that periodically reverses direction
D
Current that never changes
13.
What is 'magnetic flux'?
A
The speed at which magnets attract
B
The color of a magnetic field
C
A measure of the total magnetic field passing through a given area
D
The strength of a permanent magnet
14.
What is a 'semiconductor'?
A
A superconducting material
B
A material with electrical conductivity between a conductor and an insulator, used in electronics
C
A type of insulating material
D
A perfect conductor of electricity
15.
What did 'Faraday's Law' establish?
A
That a changing magnetic field induces an electric current in a conductor
B
The structure of atoms
C
The relationship between force and mass
D
The speed of electromagnetic waves

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