UET 1-4 Book

Units 1-4 UET 2023 Book Chp

1. Atoms contain three types of subatomic particles: electrons, protons, and neutrons. The ________ orbit around the nucleus of an atom.

• (a) electrons

• (b) protons

• (c) neutrons

• (d) nucleus

• (a) electrons

1. ________ do not participate in the flow of energy and they have a positive electrical charge with lines of force going straight out in all directions.

• (a) Electrons

• (b) Protons

• (c) Neutrons

• (d) Nuclei

• (b) Protons

1. ________ have no charge and therefore have no lines of force.

• (a) Electrons

• (b) Protons

• (c) Neutrons

• (d) Nuclei

• (c) Neutrons

1. Because of their light weight, ________ actively participate in the transfer of energy and have lines of force going inward in all directions.

• (a) electrons

• (b) protons

• (c) neutrons

• (d) nuclei

• (a) electrons

1. The ________ of an atom only contains protons and neutrons.

• (a) electrons

• (b) protons

• (c) neutrons

• (d) nucleus

(d) nucleus.

1. Coulomb's Law states that, "Particles with ________ charges repel each other."

• (a) balanced

• (b) charged

• (c) unlike

• (d) like

(d) like.

1. Coulomb's Law states that, "Particles with ________ charges attract each other."

• (a) balanced

• (b) charged

• (c) unlike

• (d) like

(c) unlike.

1. The atomic electrostatic ________ of an atom is either balanced, negative, or positive depending on the number of electrons compared to the number of protons.

• (a) field

• (b) force

• (c) power

• (d) charge

• (d) charge

1. If an atom contains an equal number of electrons and protons, the atom has a ____ atomic charge.
   
   (a) balanced
   
   (b) positive
   
   (c) negative
   
   (d) none of these

a) balanced

1. If an atom contains more electrons than protons, the atom has a ____ atomic charge.
   
   (a) balanced
   
   (b) positive
   
   (c) negative
   
   (d) none of these

(c) negative

1. If an atom contains more protons than electrons, the atom has a ____ atomic charge.
   
   (a) balanced
   
   (b) positive
   
   (c) negative
   
   (d) none of these

1. (b) positive

1. When unlike materials are in contact with each other, electrons from one material move to the surface of the other, but the protons remain on the ____ surface.
   
   (a) first
   
   (b) original
   
   (c) last
   
   (d) none of these

(b) original.

1. When objects are quickly separated, both materials display an electric charge because one material has an excess of electrons while the other has ____ electrons.
   
   (a) no
   
   (b) fewer
   
   (c) more
   
   (d) extra

b) fewer.

1. The human body in a low-humidity environment can have a dangerous static discharge of several ____ volts.
   
   (a) hundred
   
   (b) thousand
   
   (c) million
   
   (d) billion

(b) thousand

1. Lightning is the ____ of high-voltage cells within clouds to, and from, the Earth and sometimes to space.
   
   (a) build up
   
   (b) charging
   
   (c) discharging
   
   (d) neutralizing

1. (c) discharging

1. As a cloud's electrostatic charge builds up, it creates an ionized path from the cloud toward the Earth; this ionized path is called a ____.
   
   (a) stepped-down leader
   
   (b) streamer
   
   (c) ray
   
   (d) bolt

(a) stepped-down leader

1. At the same time the stepped leader originates, a similar ionized path called a ____ rises from the Earth or another positively charged object.
   
   (a) stepped leader
   
   (b) stepped-up streamer
   
   (c) ray
   
   (d) bolt

1. (b) stepped-up streamer

1. An electrostatic discharge (lightning strike) ____ the positive and negative electrostatic charges between the stepped leader and streamer.
   
   (a) disrupts
   
   (b) interrupts
   
   (c) neutralizes
   
   (d) equalizes

(c) neutralizes

b) nonconductive

a) discharge to.

attraction.

valence

decreases

evenly

movement

conductive

(d) silver, copper, gold, and aluminum.

one.

(b) three.

a) eight.

three or four

d) eight

b) compound

CHP 1 FINISHED UET units 1-4

UET 2023 Chapter 3 DONE