Answers25-26 TX-Physics B-CRUnit Test

Unit Test — Unit test Answers

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1
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Rays of light strike a bumpy road and are reflected.

A
They will not follow the law of reflection.
B
Each will reflect at the exact same angle of reflection.
C
They will all travel in the same direction.
D
Each will reflect at an angle equal to its angle of incidence.
2
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Which best explains what happens when an electron moves from an excited state to the ground state?

A
The electron absorbs energy as it moves to a lower energy level.
B
The electron absorbs energy as it moves to a higher energy level.
C
The electron releases energy as it moves to a higher energy level.
D
The electron releases energy as it moves to a lower energy level.
3

Which statement describes characteristics of a concave lens?

A
A concave lens diverges light and curves inward.
B
A concave lens diverges light and curves outward.
C
A concave lens converges light and curves inward.
D
A concave lens converges light and curves outward.
4

Which of the following would most benefit from quantum computing?

A
animating cartoons
B
running a cash register
C
protecting a device from a cyberattack
D
determining the colors found in a rainbow
5

When using the lens equation, a negative value as the solution for di indicates that the image is

A
real.
B
virtual.
C
upright.
D
inverted.
6

Serena draws a diagram to compare what happens when rays hit a boundary and are either reflected or refracted.

Question illustration
A
X: ray bounces off a boundary and maintains constant speed Y: ray changes direction Z: ray passes through a boundary and changes speed
B
X: ray bounces off a boundary and changes speed Y: ray changes direction Z: ray passes through a boundary and maintains constant speed
C
X: ray bounces off a boundary and changes direction Y: ray maintains constant speed Z: ray passes through a boundary and does not change direction
D
X: ray bounces off a boundary and does not change directionY: ray maintains constant speed Z: ray passes through a boundary and changes direction
7

What is the mirror formula for curved mirrors?

A
The inverse of f equals the inverse of d Subscript o Baseline times the inverse of d Subscript I Baseline.
Option A
B
The inverse of f plus the inverse of d Subscript o Baseline equals the inverse of d Subscript I Baseline.
Option B
C
The inverse of f equals the inverse of d Subscript o Baseline plus the inverse of d Subscript I Baseline.
Option C
D
The inverse of f equals the inverse of d Subscript o Baseline minus the inverse of d Subscript I Baseline.
Option D
8

When using the magnification equation, a value greater than 1 as the solution for M indicates that the image is

A
larger than the object.
B
smaller than the object.
C
real.
D
virtual.
9

A ray diagram is shown.

Question illustration
A
It shows an incident ray.
B
It shows that the ray is changing direction.
C
It shows the ray passing through the boundary.
D
It shows that angles form between the rays and the normal.
10

A spring that has a spring constant of 440 N/m exerts a force of 88 N on a box. What is the displacement of the spring?

A
0.2 m
B
5 m
C
352 m
D
528 m
11

As opposed to concave lenses, which characteristic of convex lenses makes them useful in microscopes?

A
Convex lenses can produce images larger than objects.
B
Convex lenses can produce upright images.
C
Convex lenses cause light rays to spread out.
D
Convex lenses cause light rays to refract.
13

Radio stations use electromagnetic waves for broadcasting. The chart shows different frequencies of waves used by radio stations.

Question illustration
A
W
B
X
C
Y
D
Z
14

Changes in the appearance of emission and absorption spectrums are caused by the activities of

A
protons.
B
electrons.
C
neutrons.
D
neutrinos.
15

How much force is needed to stretch a spring 1.2 m if the spring constant is 8.5 N/m?

A
7.1 N
B
7.3 N
C
9.7 N
D
10.2 N
16

A ray diagram is shown.

Question illustration
A
index of refraction
B
index of reflection
C
angle of incidence
D
angle of refraction
17

Kayla drew two ray diagrams to compare the behavior of light rays.

Question illustration
A
Diagram X shows reflection, and diagram Y shows refraction from a less dense to a denser medium.
B
Diagram X shows refraction from a less dense to a denser medium, and diagram Y shows reflection.
C
Diagram X shows reflection, and diagram Y shows refraction from a denser to a less dense medium.
D
Diagram X shows refraction from a denser to a less dense medium, and diagram Y shows reflection.
18

Wilam made a chart to summarize the results of experiments with the photoelectric effect.

Question illustration
A
The first result should state that frequencies of light that were lower than the frequency threshold of the metal could not eject electrons.
B
The first result should state that frequencies of light that were lower than the frequency threshold of the metal could not eject electrons.
C
The second result should state that as soon as light struck the metal, protons were ejected.
D
The second result should state that as soon as light struck the metal, protons were ejected.
E
The second result should state that just before light struck the metal, electrons were ejected.
F
The second result should state that just before light struck the metal, electrons were ejected.
G
The third result should state that the kinetic energy of the ejected electrons depends only on the frequency of the photons.
H
The third result should state that the kinetic energy of the ejected electrons depends only on the frequency of the photons.
19

A ray diagram shows an object placed between 2F and F of a convex lens. The image produced is

A
smaller than the object.
B
upright.
C
larger than the object.
D
virtual.
20

A table of the visible light spectrum is shown below.Tyrone analyzes the emission spectrum of an unknown element. He observes two discrete lines at 600 nm and 650 nm, and he sees many lines corresponding to shorter wavelengths, with the strongest line being at 475 nm.Which emission spectrum is Tyrone most likely analyzing?

Question illustration
A
A line spectrum with one black line in purple, blue, light blue and red.
Option A
B
A line spectrum with 3 black lines in purple, one black line in blue, 2 black lines in light blue, one black line in orange and one black line in orange-red.
Option B
C
A line spectrum with 3 black lines in purple, 2 black lines in blue, 2 black lines in light blue, one black line in green and one black line in yellow.
Option C
D
A line spectrum with 4 black lines in blue, 6 black lines in green, 3 black lines in yellow and one black line in orange.
Option D
21

Rana writes a summary about a mass on a spring in simple harmonic motion as it moves upward from the equilibrium position toward the maximum positive displacement.As the mass moves upward, the velocity is positive and decreasing while the acceleration is negative and decreasing.

A
The velocity should be negative, not positive.
B
The acceleration should be positive, not negative.
C
The velocity should be increasing, not decreasing.
D
The acceleration should be increasing, not decreasing.

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