Electromagnetiv Theory

Question 1

A Danish physicist, discovered that there was a relationship between electricity and magnetism

Answer 1

Hans Christian Oersted

Question 2

Father of modern physics and formulated the theory of electromagnetism

Answer 2

James Clark Maxwell

Question 3

Demonstrated that the electromagnetic waves predicted by Maxwell and discovered radio waves
-unit of frequency: a cycle per secord is one _____

Answer 3

Heinrich Hertz

Question 4

Achieved an electrical current from a changing magnetic field, phenomenon known as electromagnetic induction

-father of electric motor, electric generator, electric transformer, and electrolysis

Answer 4

Michael Faraday

Question 5

Law of electromagnetism called _____’s Law that describes the magnetic force between two electric currents

Answer 5

Andre-Marie Ampere

Question 6

Waves are?

Answer 6

Disturbances that transfers energy from one place to another without transferring matter

Question 7

True or False. Mechanical Waves travel faster through solid

Answer 7

True

Question 8

Name the two types of waves

Answer 8

Mechanical and electromagnetic waves

Question 9

Sound waves, earthquake waves, water waves are example of what type of waves?

Answer 9

Mechanical Waves

Question 10

They travel in free space at the speed of 3x10^8 m/s

Answer 10

Electromagnetic waves (EM Waves)

Question 11

What does mechanical waves require to transfer energy

Answer 11

Needs a medium or matter to move

Question 12

Waves that do NOT require a Medium to travel, it transfer even in vacuum (empty space)

Answer 12

Electromagnetic Waves

Question 13

The electric field and magnetic field vibrates __________ to each other

Answer 13

Perpendicular

Question 14

Name the Electromagnetic Spectrum from the shortest wavelength to the longest wavelength

Answer 14

Gamma ray
X-ray
Ultraviolet
Visible Light
Infrared
Microwave
Radio wave (R-wave)

Question 15

Frequency is inversely proportional to?

Answer 15

Wavelength

Question 16

Which has the higher frequency?
a) microwave
b) radio wave

Answer 16

A. Microwave

Question 17

Give the arrangement of EM spectrum from lowest frequency to the highest frequency

Answer 17

Radio Wave (R-wave)
Microwave
Infrared
Visible Light
Ultraviolet
X-ray
Gamma Ray

Question 18

Electromagnetic Spectrum is the

Answer 18

Full range of electromagnetic radiation

Question 19

Name the scientists who discovered the GAMMA RAY

Answer 19

Paul Villard

Question 20

Wilhelm Conrad Roentgen discovered what wave?

Answer 20

X-ray

Question 21

Name the scientists who discovered the Ultraviolet

Answer 21

Johann Wilhelm Ritter

Question 22

Which dis Isaac Newton discovered?
a) R-wave
b) Ultraviolet
c) Visible Light
d) Infrared

Answer 22

C. Visible Light

Question 23

William Herschel discovered what wave?

Answer 23

Infrared

Question 24

Which light can see through the human eye?

Answer 24

Visible Light

Question 25

Microwaves are discovered by

Answer 25

Percy Spencer

Question 26

Who discovered Radio waves? A) Michael Faraday B) Heinrich Hertz C) Paul Villard D) John Frederick

Answer 26

B. Heinrich Hertz

Question 27

What wave doeas people encounter everyday (heat race)

Answer 27

Infrared

Question 28

National phenomenon that splits visible light into spectrum of colors

Answer 28

Rainbow (ROYGBIV)

Question 29

True or false. Microwave, Ultraviolet, X-ray, and gamma ray penetrates the Earth’s atmosphere?

Answer 29

False, it doesn’t penetrate the Earth’s atmosphere

Question 30

Does Radio wave and visible light penetrates Earth’s atmosphere?

Answer 30

Yes, they do