PHY 112 - Rio Salado Test Questions and Answers Latest.

PHY 112 - Rio Salado Test Questions and
Answers Latest
Question 1
Three charged particles are held in place. Particle A has a net charge of +2 μC and is
at (0, 0) m. Particle B has a net charge of -4 μC and is placed a (0.5, 0) m. Particle C has
a net charge of -4 μC and is at (0, 0.5) m. What is the magnitude of the net force on
particle A?
A) 0.41 N
B) 0.29 N
C) 0.58 N
D) 0.17 N
Correct Answer
A) 0.41 N



Question 2
Which of the following statements regarding static electric charge is most accurate?
A) Force is proportional to the distance between the charged particles.
B) Force is proportional the inverse distance between the charged particles.
C) Force is proportional to the inverse square distance between the charged particles.
D) Force is proportional to the square of the distance between the charged particles.
Correct Answer
C) Force is proportional to the inverse square distance between the charged
particles.




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,Question 3
Two neutral metal blocks are in physical contact side-by-side. Block A is on the left,
and block B is on the right. A positively charged rod is near the left side of block A
(see below). With the positive rod still present, the blocks separate. As a result, block B
will have a net charge that is

A) positive.
B) negative
C) neutral
D)not enough information.
Correct Answer
A) positive



Question 4
Three charged particles are held in place. Particle A has a net charge of +2 μC and is
at (0, 0) m. Particle B has a net charge of +4 μC and is placed a (0.5, 0) m. Particle C
has a net charge of -4 μC and is placed at (0, 0.5) m. What is the angle of direction of
the net force acting on particle A?
A) 45°
B) 135°
C) 225°
D) 315°
Correct Answer
B) 135°



Question 5
Which of the following statements concerning the structure of an atom is accurate?
A) Electrons orbit the nucleus exactly the same way that planets orbit the Sun.
B) Neutrally charged atoms contain equal amounts of protons and electrons.
C) The nucleus of an atom is composed of protons and electrons.
D)None of the above statements are accurate.
Correct Answer
B) Neutrally charged atoms contain equal amounts of protons and electrons.




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, Question 6
The property of matter that is responsible for static electric effects is
A) charge.
B) mass.
C) momentum.
D) density.
Correct Answer
A) charge



Question 7
A positively charged plastic balloon filled with air will stick to a neutrally charged
nonmetal ceiling. Which of the following is the most likely explanation for this
behavior?
A) Some of the charge on the balloon transferred to the ceiling through conduction.
B) The ceiling already had a net positive charge.
C) The ceiling already had a net negative charge.
D) The balloon caused the ceiling to polarize, which created a net attracting force
between the polarized ceiling and the balloon.
Correct Answer
D) The balloon caused the ceiling to polarize, which created a net attracting force
between the polarized ceiling and the balloon.



Question 8
Two charged particles each with a net charge of -q are a distance r apart. The electric
force F is measured. The distance between the particles then doubles to 2r, and the
amount of charge on BOTH charges doubles to -2q. Relative to the original force,
what is the new electric force?
A) 1/2 F
B) 2 F
C) 4 F
D) F
Correct Answer
D) F




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