Question 1

The ozone layer absorbs __________ radiation from sunlight.

Accepted Answer

The answer of The ozone layer absorbs __________ radiation from...

Question 2

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 of __________.

Accepted Answer

electromag

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. 
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 10,000 times.

Accepted Answer

A) True 
 B)False

Question 4

__________ radiation causes your skin to tan.

Accepted Answer

The answer of __________ radiation causes your skin to tan....

Question 5

The ionosphere reflects high frequency radio waves.

Accepted Answer

A) True 
 B)False

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

Accepted Answer

A) True 
 B)False

Question 7

What makes an ordinary bar magnet magnetic?

Accepted Answer

A)  Electrons inside it are themselves tiny magnets. 
B)  The magnetic fields of electrons in the magnet are aligned and add together. 
C)  It contains magnetic charges. 
D)  none of the above 
A)  Electrons inside it are themselves tiny magnets. 
B)  The magnetic fields of electrons in the magnet are aligned and add together. 
C)  It contains magnetic charges. 
D)  none of the above

Question 8

The type of EM wave having the highest frequency is

Accepted Answer

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

Question 9

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

Accepted Answer

The answer of The greenhouse effect occurs because carbon dioxide...

Question 10

A magnetic field is created by an electric charge if the charge is

Accepted Answer

A)  positive. 
B)  negative. 
C)  moving. 
D)  stationary. 
E)  any of the above. 
A)  positive. 
B)  negative. 
C)  moving. 
D)  stationary. 
E)  any of the above.

Question 11

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 12

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

Accepted Answer

A) True 
 B)False

Question 14

N rays do not exist.

Accepted Answer

A) True 
 B)False

Question 15

One can reverse the north and south poles of an electromagnet by reversing the direction of current flow through it.

Accepted Answer

A) True 
 B)False

Question 16

The total radiant power emitted by a blackbody is proportional to its _________________ raised to the fourth power.

Accepted Answer

The answer of The total radiant power emitted by a...

Question 17

What's the Big Bang?

Accepted Answer

A)  the creation of the universe 
B)  microwave radiation from all directions in the sky 
C)  the Hubble relation 
D)  a punk rock band 
A)  the creation of the universe 
B)  microwave radiation from all directions in the sky 
C)  the Hubble relation 
D)  a punk rock band

Question 18

What does "IR" stand for?

Accepted Answer

A)  ultraviolet 
B)  muon neutrino 
C)  high frequency 
D)  infrared 
A)  ultraviolet 
B)  muon neutrino 
C)  high frequency 
D)  infrared

Question 19

Match between columns
                        Premises: its direction at a point is indicated by a compass
the highest frequency electromagnetic waves
radar utilizes this
causes skin to tan
absorbs ultraviolet light in sunlight
works with AC but not with DC
the main form of radiation that our bodies emit
low frequency radio waves reflect off this
occurs because carbon dioxide blocks infrared but not visible light
generators and dynamic microphones utilize this
only the very lowest frequencies of these waves can penetrate ocean water
a naturally occurring ferromagnetic substance

Accepted Answer

The Answer of gamma rays and ultraviolet and ozone and is...

Question 20

The EM wave that has the smallest wavelength in this list is

Accepted Answer

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

The ozone layer absorbs __________ radiation from sunlight.

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 of __________.

__________ radiation causes your skin to tan.

The ionosphere reflects high frequency radio waves.

What makes an ordinary bar magnet magnetic?

The type of EM wave having the highest frequency is

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

A magnetic field is created by an electric charge if the charge is

The type of EM waves used in radar is

The lowest frequency visible light is

N rays do not exist.

One can reverse the north and south poles of an electromagnet by reversing the direction of current flow through it.

The total radiant power emitted by a blackbody is proportional to its _________________ raised to the fourth power.

What's the Big Bang?

What does "IR" stand for?

The EM wave that has the smallest wavelength in this list 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

Exam 8: Electromagnetism and Em Waves

The ozone layer absorbs __________ radiation from sunlight.

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 of __________.

__________ radiation causes your skin to tan.

The ionosphere reflects high frequency radio waves.

What makes an ordinary bar magnet magnetic?

The type of EM wave having the highest frequency is

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

A magnetic field is created by an electric charge if the charge is

The type of EM waves used in radar is

The lowest frequency visible light is

N rays do not exist.

One can reverse the north and south poles of an electromagnet by reversing the direction of current flow through it.

The total radiant power emitted by a blackbody is proportional to its _________________ raised to the fourth power.

What's the Big Bang?

What does "IR" stand for?

The EM wave that has the smallest wavelength in this list 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