Question 1

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

Accepted Answer

A) True 
 B)False  False

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. D

Question 3

The type of EM waves used in radar is __________.

Accepted Answer

microwave

Question 4

A transformer only works with AC.

Accepted Answer

A) True 
 B)False

Question 5

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 peak of its blackbody radiation curve

Accepted Answer

A)  shifts toward longer wavelength. 
B)  shifts toward shorter wavelength. 
C)  shifts upward. 
D)  shifts downward. 
E)  doesn't change. 
A)  shifts toward longer wavelength. 
B)  shifts toward shorter wavelength. 
C)  shifts upward. 
D)  shifts downward. 
E)  doesn't change.

Question 6

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. 
The peak of a body's blackbody radiation curve shifts upward as the temperature of the body __________.

Accepted Answer

The answer of For a body emitting blackbody radiation, the...

Question 7

The main form of radiation that our bodies emit is __________.

Accepted Answer

The answer of The main form of radiation that our...

Question 8

Making a digital recording of a sound involves

Accepted Answer

A)  analog-to-digital conversion. 
B)  digital-to-analog conversion. 
C)  electromagnetic waves. 
D)  all of the above. 
A)  analog-to-digital conversion. 
B)  digital-to-analog conversion. 
C)  electromagnetic waves. 
D)  all of the above.

Question 9

The highest frequency visible light is

Accepted Answer

A)  violet. 
B)  red. 
C)  blue. 
D)  green. 
E)  yellow. 
A)  violet. 
B)  red. 
C)  blue. 
D)  green. 
E)  yellow.

Question 10

The greenhouse effect occurs because

Accepted Answer

A)  low frequency EM waves are reflected from the atmosphere. 
B)  high frequency EM waves are reflected from the atmosphere. 
C)  the ozone layer absorbs ultraviolet light. 
D)  carbon dioxide in the atmosphere absorbs infrared radiation. 
E)  none of the above 
A)  low frequency EM waves are reflected from the atmosphere. 
B)  high frequency EM waves are reflected from the atmosphere. 
C)  the ozone layer absorbs ultraviolet light. 
D)  carbon dioxide in the atmosphere absorbs infrared radiation. 
E)  none of the above

Question 11

__________ are emitted when high speed electrons decelerate as they are smashed into a metal target.

Accepted Answer

The answer of __________ are emitted when high speed electrons...

Question 12

A coil of wire is connected to a galvanometer. When a bar magnet is moved in and out of the coil, the galvanometer records a current. The current results because

Accepted Answer

A)  the coil acts like a transformer. 
B)  the changing magnetic field induces an electric field in the wire. 
C)  an electromagnetic wave is generated. 
D)  the wire is ferromagnetic. 
E)  none of the above 
A)  the coil acts like a transformer. 
B)  the changing magnetic field induces an electric field in the wire. 
C)  an electromagnetic wave is generated. 
D)  the wire is ferromagnetic. 
E)  none of the above

Question 13

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 __________.

Accepted Answer

The answer of For a body emitting blackbody radiation, the...

Question 14

A speaker can be used as a crude microphone.

Accepted Answer

A) True 
 B)False

Question 15

Infrared radiation causes your skin to tan.

Accepted Answer

A) True 
 B)False

Question 16

The type of EM wave having the highest frequency is __________.

Accepted Answer

The answer of The type of EM wave having the...

Question 17

__________ radiation is emitted from a small hole in a furnace.

Accepted Answer

The answer of __________ radiation is emitted from a small...

Question 18

The type of EM wave used in aircraft radar is

Accepted Answer

A)  radio waves. 
B)  microwaves. 
C)  x-rays. 
D)  gamma rays. 
A)  radio waves. 
B)  microwaves. 
C)  x-rays. 
D)  gamma rays.

Question 19

Three devices that use electromagnetic induction in their operation are __________, __________, and __________.

Accepted Answer

generators, transfor

Question 20

Thermograms use ultraviolet radiation to sense heat.

Accepted Answer

A) True 
 B)False

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

The type of EM waves used in radar is __________.

A transformer only works with AC.

The main form of radiation that our bodies emit is __________.

Making a digital recording of a sound involves

The highest frequency visible light is

The greenhouse effect occurs because

__________ are emitted when high speed electrons decelerate as they are smashed into a metal target.

A coil of wire is connected to a galvanometer. When a bar magnet is moved in and out of the coil, the galvanometer records a current. The current results because

A speaker can be used as a crude microphone.

Infrared radiation causes your skin to tan.

The type of EM wave having the highest frequency is __________.

__________ radiation is emitted from a small hole in a furnace.

The type of EM wave used in aircraft radar is

Three devices that use electromagnetic induction in their operation are , , and __.

Thermograms use ultraviolet radiation to sense heat.

The Study of Motion

Newton S 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

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

The type of EM waves used in radar is __________.

A transformer only works with AC.

The main form of radiation that our bodies emit is __________.

Making a digital recording of a sound involves

The highest frequency visible light is

The greenhouse effect occurs because

__________ are emitted when high speed electrons decelerate as they are smashed into a metal target.

A coil of wire is connected to a galvanometer. When a bar magnet is moved in and out of the coil, the galvanometer records a current. The current results because

A speaker can be used as a crude microphone.

Infrared radiation causes your skin to tan.

The type of EM wave having the highest frequency is __________.

__________ radiation is emitted from a small hole in a furnace.

The type of EM wave used in aircraft radar is

Three devices that use electromagnetic induction in their operation are __________, __________, and __________.

Thermograms use ultraviolet radiation to sense heat.

The Study of Motion

Newton S 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

Three devices that use electromagnetic induction in their operation are , , and __.