Question 1

What are the units of h in the equation E = hf?

Accepted Answer

A)  
B)  
C)   J×s
D)   W×mE) B) and D)
F) B) and C) C

Question 2

Consider an electrical transformer has 10 loops on its primary coil and 20 loops on its secondary coil. What is the current in the secondary if the current is the primary coil is 5.0 A?

Accepted Answer

A)   2.5 A
B)   5.0 A
C)   10.0 A
D)   20.0 AE) C) and D)
F) A) and D)

Question 3

If one cuts a current carrying wire, the flow of electricity will spill out into the air.

Accepted Answer

A) True 
 B)False

Question 4

When an electric stove element is hot enough, it gives off a dull red glow. When it cools to the point that it no longer glows, it will

Accepted Answer

A)   emit only shorter wavelength energy.
B)   emit the same wavelength as before, but with less energy.
C)   emit only longer wavelength energy.
D)   stop emitting energy altogether.E) C) and D)
F) B) and C) C

Question 5

The range of energies emitted by the Sun is most intense near the yellow-green wavelengths.

Accepted Answer

A) True 
 B)False

Question 6

Ultraviolet light waves carry more energy than infrared light waves.

Accepted Answer

A) True 
 B)False

Question 7

Which numbered arrow is the refracted ray indicated by?

Accepted Answer

A)   1
B)   2
C)   3
D)   4E) B) and D)
F) B) and C) B

Question 8

The index of refraction for flint glass is 1.5. This means that

Accepted Answer

A)   light travels faster in this substance than it does in vacuum.
B)   the wavelength of light passing through glass is 1.5× longer as it is in vacuum.
C)   the speed of light is slower in this substance than it is in vacuum.
D)   a ray of light is refracted away from the normal as it passes from air into glass.E) C) and D)
F) A) and B)

Exam 2: Light and Electricity

What are the units of h in the equation E = hf?

Correct Answer
verified
C

Consider an electrical transformer has 10 loops on its primary coil and 20 loops on its secondary coil. What is the current in the secondary if the current is the primary coil is 5.0 A?

Correct Answer
verified

If one cuts a current carrying wire, the flow of electricity will spill out into the air.

Correct Answer
verified

When an electric stove element is hot enough, it gives off a dull red glow. When it cools to the point that it no longer glows, it will

Correct Answer
verified
C

The range of energies emitted by the Sun is most intense near the yellow-green wavelengths.

Correct Answer
verified

Ultraviolet light waves carry more energy than infrared light waves.

Correct Answer
verified

Which numbered arrow is the refracted ray indicated by? $Which numbered arrow is the refracted ray indicated by? A) 1 B) 2 C) 3 D) 4$

Correct Answer
verified
B

The index of refraction for flint glass is 1.5. This means that

Correct Answer
verified

Exam 2: Light and Electricity

What are the units of h in the equation E = hf?

Correct AnswerverifiedC

Consider an electrical transformer has 10 loops on its primary coil and 20 loops on its secondary coil. What is the current in the secondary if the current is the primary coil is 5.0 A?

Correct AnswerverifiedShow Answer

If one cuts a current carrying wire, the flow of electricity will spill out into the air.

Correct AnswerverifiedShow Answer

When an electric stove element is hot enough, it gives off a dull red glow. When it cools to the point that it no longer glows, it will

Correct AnswerverifiedC

The range of energies emitted by the Sun is most intense near the yellow-green wavelengths.

Correct AnswerverifiedShow Answer

Ultraviolet light waves carry more energy than infrared light waves.

Correct AnswerverifiedShow Answer

Which numbered arrow is the refracted ray indicated by?

Correct AnswerverifiedB

The index of refraction for flint glass is 1.5. This means that

Correct AnswerverifiedShow Answer

Correct Answer
verified
C

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
C

Correct Answer
verified

Correct Answer
verified

Which numbered arrow is the refracted ray indicated by? $Which numbered arrow is the refracted ray indicated by? A) 1 B) 2 C) 3 D) 4$

Correct Answer
verified
B

Correct Answer
verified