Question 1

A transformer is designed to step down the 120 V line voltage to 9 V.If there are 400 turns on the input coil,how many turns should there be on the output coil?

Accepted Answer

The answer of A transformer is designed to step down...

Question 2

For a body emitting blackbody radiation,the total power emitted is proportional to the 4th power of the body's absolute temperature:   (T in kelvins)
and the wavelength of the emitted EM radiation that has the highest intensity is inversely proportional to the body's absolute temperature according to:   (   in meters,T in kelvins)
Assume an object is emitting blackbody radiation.
-A body in a room at 300 K is heated to 3,000 K.The amount of energy radiated each second by the body increases by a factor of

Accepted Answer

A) 10. 
B) 100. 
C) 1,000. 
D) 10,000. 
E) 100,000. 
A) 10. 
B) 100. 
C) 1,000. 
D) 10,000. 
E) 100,000.

Question 3

For a body emitting blackbody radiation,the total power emitted is proportional to the 4th power of the body's absolute temperature:   (T in kelvins)
and the wavelength of the emitted EM radiation that has the highest intensity is inversely proportional to the body's absolute temperature according to:   (   in meters,T in kelvins)
Assume an object is emitting blackbody radiation.
-As the temperature of a body increases the color of the body shifts from blue to red.

Accepted Answer

A) True 
 B)False

Question 4

The greenhouse effect occurs because carbon dioxide in the atmosphere absorbs ultraviolet radiation.

Accepted Answer

A) True 
 B)False

Question 5

How can microwave ovens heat food more quickly than conventional ovens?

Accepted Answer

A) Microwaves give energy directly to the molecules in the food. 
B) Conventional ovens must conduct heat from the surface to the interior of the food. 
C) Microwaves heat the inside as well as the surface of the food. 
D) all of the above 
A) Microwaves give energy directly to the molecules in the food. 
B) Conventional ovens must conduct heat from the surface to the interior of the food. 
C) Microwaves heat the inside as well as the surface of the food. 
D) all of the above

Question 6

The auxiliary power unit (APU)on a jetliner is a generator and operates on the principle of __________________

Accepted Answer

electromag

Question 7

What is the temperature (to one decimal place and in degrees K)for radiation that has a maximum wavelength (   
max)of 3.5 × 10-6 m?

Accepted Answer

Question 8

The type of EM radiation that has wavelength just a bit shorter than that of visible light is __________.

Accepted Answer

The answer of The type of EM radiation that has...

Question 9

The type of EM waves used in radar is

Accepted Answer

A) ultraviolet. 
B) infrared. 
C) x-ray. 
D) microwave. 
E) blackbody. 
A) ultraviolet. 
B) infrared. 
C) x-ray. 
D) microwave. 
E) blackbody.

Question 10

The type of radiation affected by greenhouse gasses is

Accepted Answer

A) UV radiation. 
B) IR radiation. 
C) visible radiation. 
D) gamma radiation. 
A) UV radiation. 
B) IR radiation. 
C) visible radiation. 
D) gamma radiation.

Question 11

A stationary electric charge produces a magnetic field around it.

Accepted Answer

A) True 
 B)False

Question 12

​Match each item with the correct statement below.
-the main form of radiation that our bodies emit

Accepted Answer

A) ​blackbody radiation 
B) ​carbon dioxide 
C) ​electromagnetic induction 
D) ​gamma rays 
E) ​greenhouse effect
F)​infrared
G)​ionosphere
H)​lodestone
I)​magnetic field
J)​microwaves
K)​ozone
L)​radio waves
M)​transformer
N)​ultraviolet
O)​x rays 
A) ​blackbody radiation 
B) ​carbon dioxide 
C) ​electromagnetic induction 
D) ​gamma rays 
E) ​greenhouse effect
F)​infrared
G)​ionosphere
H)​lodestone
I)​magnetic field
J)​microwaves
K)​ozone
L)​radio waves
M)​transformer
N)​ultraviolet
O)​x rays

Question 13

Blue light has a longer wavelength than red light.

Accepted Answer

A) True 
 B)False

Question 14

The radiation emitted from a small hole in a furnace is

Accepted Answer

A) ultraviolet. 
B) infrared. 
C) x-ray. 
D) microwave. 
E) blackbody. 
A) ultraviolet. 
B) infrared. 
C) x-ray. 
D) microwave. 
E) blackbody.

Question 15

The increase in the amount of carbon dioxide in the atmosphere is contributing to the greenhouse effect.

Accepted Answer

A) True 
 B)False

Question 16

The magnetic compass in an aircraft points to the ______________ pole.

Accepted Answer

A) magnetic north 
B) magnetic south 
C) geographic north 
D) geographic south 
A) magnetic north 
B) magnetic south 
C) geographic north 
D) geographic south

Question 17

Higher frequency radio waves are reflected by the ionosphere.

Accepted Answer

A) True 
 B)False

Question 18

About how hot does something have to get to glow red hot?

Accepted Answer

A) 375 degrees F 
B) 800 degrees F 
C) 3000 K 
D) 6000 K 
A) 375 degrees F 
B) 800 degrees F 
C) 3000 K 
D) 6000 K

Question 19

The direction of a magnetic field at a point can be determined by a compass.

Accepted Answer

A) True 
 B)False

Question 20

A glowing blackbody that appears bluish in color is __________ than one that appears reddish.

Accepted Answer

The answer of A glowing blackbody that appears bluish in...

A transformer is designed to step down the 120 V line voltage to 9 V.If there are 400 turns on the input coil,how many turns should there be on the output coil?

The greenhouse effect occurs because carbon dioxide in the atmosphere absorbs ultraviolet radiation.

How can microwave ovens heat food more quickly than conventional ovens?

The auxiliary power unit (APU)on a jetliner is a generator and operates on the principle of __________________

What is the temperature (to one decimal place and in degrees K)for radiation that has a maximum wavelength ( _max)of 3.5 × 10^-6 m?

The type of EM radiation that has wavelength just a bit shorter than that of visible light is __________.

The type of EM waves used in radar is

The type of radiation affected by greenhouse gasses is

A stationary electric charge produces a magnetic field around it.

Match each item with the correct statement below. -the main form of radiation that our bodies emit

Blue light has a longer wavelength than red light.

The radiation emitted from a small hole in a furnace is

The increase in the amount of carbon dioxide in the atmosphere is contributing to the greenhouse effect.

The magnetic compass in an aircraft points to the ______________ pole.

Higher frequency radio waves are reflected by the ionosphere.

About how hot does something have to get to glow red hot?

The direction of a magnetic field at a point can be determined by a compass.

A glowing blackbody that appears bluish in color is __________ than one that appears reddish.

The Study of Motion

Newtons Laws

Energy and Conservation Laws

Physics of Matter

Temperature and Heat

Waves and Sound

Electricity

Optics

Atomic Physics

Nuclear Physics

Special Relativity and Elementary Particles

Filters

Exam 8: Electromagnetism and Em Waves

A transformer is designed to step down the 120 V line voltage to 9 V.If there are 400 turns on the input coil,how many turns should there be on the output coil?

The greenhouse effect occurs because carbon dioxide in the atmosphere absorbs ultraviolet radiation.

How can microwave ovens heat food more quickly than conventional ovens?

The auxiliary power unit (APU)on a jetliner is a generator and operates on the principle of __________________

What is the temperature (to one decimal place and in degrees K)for radiation that has a maximum wavelength ( max)of 3.5 × 10-6 m?

The type of EM radiation that has wavelength just a bit shorter than that of visible light is __________.

The type of EM waves used in radar is

The type of radiation affected by greenhouse gasses is

A stationary electric charge produces a magnetic field around it.

​Match each item with the correct statement below. -the main form of radiation that our bodies emit

Blue light has a longer wavelength than red light.

The radiation emitted from a small hole in a furnace is

The increase in the amount of carbon dioxide in the atmosphere is contributing to the greenhouse effect.

The magnetic compass in an aircraft points to the ______________ pole.

Higher frequency radio waves are reflected by the ionosphere.

About how hot does something have to get to glow red hot?

The direction of a magnetic field at a point can be determined by a compass.

A glowing blackbody that appears bluish in color is __________ than one that appears reddish.

The Study of Motion

Newtons Laws

Energy and Conservation Laws

Physics of Matter

Temperature and Heat

Waves and Sound

Electricity

Optics

Atomic Physics

Nuclear Physics

Special Relativity and Elementary Particles

Filters

What is the temperature (to one decimal place and in degrees K)for radiation that has a maximum wavelength ( _max)of 3.5 × 10^-6 m?

Match each item with the correct statement below. -the main form of radiation that our bodies emit