Question 1

The wavelength of a radio wave from an FM station broadcasting at 93.9 megahertz on your radio dial is 0.313 meters.

Accepted Answer

A) True 
 B)False

Question 2

The ionosphere can be used to conduct radio communications over long distances.

Accepted Answer

A) True 
 B)False

Question 3

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 4

(a) What is the wavelength of the peak of the blackbody radiation curve for something at 3,000 kelvins (the temperature of the filament of a light bulb)?  (b) What type of EM wave is this?

Accepted Answer

(a 9.67 ×

Question 5

Global warming

Accepted Answer

A)  has not yet been observed. 
B)  has been caused by increasing levels of carbon dioxide in the atmosphere. 
C)  has led to a depletion of the ozone layer in the atmosphere. 
D)  has no serious consequences. 
A)  has not yet been observed. 
B)  has been caused by increasing levels of carbon dioxide in the atmosphere. 
C)  has led to a depletion of the ozone layer in the atmosphere. 
D)  has no serious consequences.

Question 6

A coil of wire is connected to a galvanometer. When the coil is rotated in a magnetic field, the galvanometer records a current because the free electrons in the moving wire experience a force from the magnetic field that pushes them through the wire.

Accepted Answer

A) True 
 B)False

Question 7

Lower frequency radio waves are reflected back to Earth by the ______________.

Accepted Answer

The answer of Lower frequency radio waves are reflected back...

Question 8

AM radio stations have greater range than FM stations because they have more powerful transmitters.

Accepted Answer

A) True 
 B)False

Question 9

The increase in the amount of carbon dioxide in the atmosphere is responsible for __________.

Accepted Answer

global war

Question 10

A superconductor expels any magnetic field from its interior. This is called

Accepted Answer

A)  electromagnetic induction. 
B)  Maxwell's effect. 
C)  magnetic declination. 
D)  the Meissner effect. 
E)  none of the above. 
A)  electromagnetic induction. 
B)  Maxwell's effect. 
C)  magnetic declination. 
D)  the Meissner effect. 
E)  none of the above.

Question 11

An electric motor can be manually turned and made to act as a generator.

Accepted Answer

A) True 
 B)False

Question 12

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. 
If the Kelvin temperature of an object is doubled, the amount of radiant energy emitted each second is __________ the original amount.

Accepted Answer

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

Question 13

A current can be made to flow in a wire if

Accepted Answer

A)  it is connected to a battery. 
B)  it is put into motion near a magnet. 
C)  a magnet is put into motion near it. 
D)  all of the above. 
A)  it is connected to a battery. 
B)  it is put into motion near a magnet. 
C)  a magnet is put into motion near it. 
D)  all of the above.

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

Higher frequency radio waves are reflected by the ionosphere.

Accepted Answer

A) True 
 B)False

Question 16

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 toward longer wavelength as the temperature of the body __________.

Accepted Answer

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

Question 17

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...

Question 18

An object at an initial temperature of 27 oC is raised to a temperature of 877 oC.  How much more energy does the object emit as blackbody radiation at the higher temperature compared to the lower temperature?

Accepted Answer

A)  32.5 
B)  215.9 
C)  864.5 
D)  1,113,123 
A)  32.5 
B)  215.9 
C)  864.5 
D)  1,113,123

Question 19

The cosmic background radiation

Accepted Answer

A)  has a blackbody spectrum. 
B)  has its peak emission in the microwave band. 
C)  corresponds to a blackbody at a temperature of 2.726 kelvins. 
D)  all of the above 
A)  has a blackbody spectrum. 
B)  has its peak emission in the microwave band. 
C)  corresponds to a blackbody at a temperature of 2.726 kelvins. 
D)  all of the above

Question 20

The type of EM radiation emitted when high speed electrons decelerate as they are smashed into a metal target is

Accepted Answer

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

The wavelength of a radio wave from an FM station broadcasting at 93.9 megahertz on your radio dial is 0.313 meters.

The ionosphere can be used to conduct radio communications over long distances.

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

(a) What is the wavelength of the peak of the blackbody radiation curve for something at 3,000 kelvins (the temperature of the filament of a light bulb)? (b) What type of EM wave is this?

Global warming

A coil of wire is connected to a galvanometer. When the coil is rotated in a magnetic field, the galvanometer records a current because the free electrons in the moving wire experience a force from the magnetic field that pushes them through the wire.

Lower frequency radio waves are reflected back to Earth by the ______________.

AM radio stations have greater range than FM stations because they have more powerful transmitters.

The increase in the amount of carbon dioxide in the atmosphere is responsible for __________.

A superconductor expels any magnetic field from its interior. This is called

An electric motor can be manually turned and made to act as a generator.

A current can be made to flow in a wire if

The radiation emitted from a small hole in a furnace is

Higher frequency radio waves are reflected by the ionosphere.

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

An object at an initial temperature of 27 ^oC is raised to a temperature of 877 ^oC. How much more energy does the object emit as blackbody radiation at the higher temperature compared to the lower temperature?

The cosmic background radiation

The type of EM radiation emitted when high speed electrons decelerate as they are smashed into a metal target is

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Newton S Laws

Energy and Conservation Laws

Physics of Matter

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Exam 8: Electromagnetism and Em Waves

The wavelength of a radio wave from an FM station broadcasting at 93.9 megahertz on your radio dial is 0.313 meters.

The ionosphere can be used to conduct radio communications over long distances.

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

(a) What is the wavelength of the peak of the blackbody radiation curve for something at 3,000 kelvins (the temperature of the filament of a light bulb)? (b) What type of EM wave is this?

Global warming

A coil of wire is connected to a galvanometer. When the coil is rotated in a magnetic field, the galvanometer records a current because the free electrons in the moving wire experience a force from the magnetic field that pushes them through the wire.

Lower frequency radio waves are reflected back to Earth by the ______________.

AM radio stations have greater range than FM stations because they have more powerful transmitters.

The increase in the amount of carbon dioxide in the atmosphere is responsible for __________.

A superconductor expels any magnetic field from its interior. This is called

An electric motor can be manually turned and made to act as a generator.

A current can be made to flow in a wire if

The radiation emitted from a small hole in a furnace is

Higher frequency radio waves are reflected by the ionosphere.

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

An object at an initial temperature of 27 oC is raised to a temperature of 877 oC. How much more energy does the object emit as blackbody radiation at the higher temperature compared to the lower temperature?

The cosmic background radiation

The type of EM radiation emitted when high speed electrons decelerate as they are smashed into a metal target is

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

An object at an initial temperature of 27 ^oC is raised to a temperature of 877 ^oC. How much more energy does the object emit as blackbody radiation at the higher temperature compared to the lower temperature?