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Phys 165 Module 7 Exam Questions with
Answers (100% Correct Answers)
True or False: Atoms are made up of protons, neutrons, and electrons. Protons
carry a positive charge, electrons carry a negative charge, and neutrons do not
carry any charge. Answer: True
True or False: When something acquires a net charge, it can be either the
protons or the electrons that move, but not the neutrons. Answer: False
What is the unit of charge?
A)Amperes
B) Coulombs
C) Farads
D) Joules Answer: B) Coulombs
1 electron = -1.60x10^-19 C
True or False: Two identical, conductive spheres have net charges on them.
Sphere A has a net charge of +2.50 mC and sphere B has a net charge of +3.81
mC. The two spheres are released in space and move only because of the
electrostatic forces between them.
When released, the two spheres should move away from each other. Answer:
True
force is positive so they will repeal each other
What is the name of a device that stores electric charge?
A) Capacitor
, 2
B) Inductor
C) Transformer
D) Electroscope Answer: A) Capacitor
(leyden jar)
A variable capacitor has too much capacitance. Which of the following changes
would NOT reduce the capacitance of this capacitor?
A) Switch the dielectric for a new one that has a smaller dielectric constant
B) Decrease the area of the plates
C) Decrease the separation between the plates Answer: C) Decrease the
separation between the plates
Increase the capacitance of a variable capacitor
- Increase the area of the plates
- Decrease the distance between the plates
- The insulator between the plates can be changed to a material with a larger
dielectric constant
When you rub a balloon on your hair, it scrapes electrons off your hair and
deposits them onto the balloon. The balloon becomes negatively charged, and
your hair becomes positively charged. What is the name of this process of
charging an object? Answer: Fricton
A negatively charged sphere is brought near a metal rod giving the end of the
rod closest to the sphere a positive charge. What is the name of this process of
charging an object?
Phys 165 Module 7 Exam Questions with
Answers (100% Correct Answers)
True or False: Atoms are made up of protons, neutrons, and electrons. Protons
carry a positive charge, electrons carry a negative charge, and neutrons do not
carry any charge. Answer: True
True or False: When something acquires a net charge, it can be either the
protons or the electrons that move, but not the neutrons. Answer: False
What is the unit of charge?
A)Amperes
B) Coulombs
C) Farads
D) Joules Answer: B) Coulombs
1 electron = -1.60x10^-19 C
True or False: Two identical, conductive spheres have net charges on them.
Sphere A has a net charge of +2.50 mC and sphere B has a net charge of +3.81
mC. The two spheres are released in space and move only because of the
electrostatic forces between them.
When released, the two spheres should move away from each other. Answer:
True
force is positive so they will repeal each other
What is the name of a device that stores electric charge?
A) Capacitor
, 2
B) Inductor
C) Transformer
D) Electroscope Answer: A) Capacitor
(leyden jar)
A variable capacitor has too much capacitance. Which of the following changes
would NOT reduce the capacitance of this capacitor?
A) Switch the dielectric for a new one that has a smaller dielectric constant
B) Decrease the area of the plates
C) Decrease the separation between the plates Answer: C) Decrease the
separation between the plates
Increase the capacitance of a variable capacitor
- Increase the area of the plates
- Decrease the distance between the plates
- The insulator between the plates can be changed to a material with a larger
dielectric constant
When you rub a balloon on your hair, it scrapes electrons off your hair and
deposits them onto the balloon. The balloon becomes negatively charged, and
your hair becomes positively charged. What is the name of this process of
charging an object? Answer: Fricton
A negatively charged sphere is brought near a metal rod giving the end of the
rod closest to the sphere a positive charge. What is the name of this process of
charging an object?
