Question 1

The operating principles of the cathode-ray tube were discovered by _____.&#10;A) George Ohm&#10;B) Wilhelm Roentgen&#10;C) Gustav Kirchhoff&#10;D) J.J. Thomson

Accepted Answer

J.J. Thomson is credited with discovering the electron using the cathode-ray tube, which laid the foundation for understanding its operating principles.

Question 2

An electrolyte may be made from water and an additive such as salt, a(n) _____, or a(n) _____.&#10;A) acid; alkali&#10;B) base; acid&#10;C) cathode; anode&#10;D) anode; electrode

Accepted Answer

An electrolyte is a substance that conducts electricity when dissolved in water. Acids, bases, and salts are all electrolytes.

Question 3

An ion is an atom that has had a(n) _____ added or removed.&#10;A) electron&#10;B) neutron&#10;C) proton&#10;D) quark

Accepted Answer

Ions are formed when atoms gain or lose electrons, not by the addition or removal of neutrons, protons, or quarks. This change in the number of electrons alters the charge of the atom, making it an ion.

Question 4

As the atmospheric pressure increases, the amount of voltage required to reach ionization potential _____.&#10;A) does not change&#10;B) doubles&#10;C) increases&#10;D) decreases

Accepted Answer

As the atmospheric pressure increases, the density of air increases, which means that the gas molecules are closer together. This makes it harder for electrons to move through the gas without colliding with gas molecules, thus requiring more voltage to achieve ionization.

Question 5

Plating copper onto iron often involves a poisonous solid called _____.&#10;A) sulfuric acid&#10;B) table salt&#10;C) metallic salt&#10;D) cuprous cyanide

Accepted Answer

Cuprous cyanide is often used in the electroplating process to plate copper onto iron, but it is known to be a poisonous solid.

Question 6

A copper electroplating process sometimes uses a compound called _____.&#10;A) table salt&#10;B) copper sulfate&#10;C) sulfuric acid&#10;D) metallic salt

Accepted Answer

Copper sulfate is commonly used in copper electroplating processes as it provides the copper ions needed for the deposition of copper onto the substrate.

Question 7

In an electroplating operation, what is he positive terminal called?&#10;A) anode&#10;B) cathode

Accepted Answer

In an electroplating operation, the positive terminal is called the anode. This is because, in electrochemistry, the anode is the electrode where oxidation occurs, and it is connected to the positive terminal of the power supply.

Question 8

If a magnesium atom combines with two chlorine atoms, the result is _____.&#10;A) table salt&#10;B) sulfuric acid&#10;C) metallic salt&#10;D) alkali

Accepted Answer

When a magnesium atom combines with two chlorine atoms, it forms magnesium chloride, which is a type of metallic salt. Magnesium is a metal, and when it combines with chlorine, a non-metal, the result is a salt, but not table salt (which is sodium chloride).

Question 9

In an electroplating operation, what is the negative terminal called?&#10;A) anode&#10;B) cathode

Accepted Answer

The cathode is the negative terminal in an electroplating operation. It is the electrode where the metal ions in the electrolyte are reduced and deposited onto the surface of the object being plated.

Question 10

Lead-acid batteries use an electrolyte containing _____.&#10;A) cuprous cyanide&#10;B) table salt&#10;C) metallic salt&#10;D) sulfuric acid

Accepted Answer

Lead-acid batteries use sulfuric acid as the electrolyte, which participates in the chemical reaction to store and release electrical energy.

Question 11

X-rays result when cathode rays strike _____.&#10;A) semiconductor&#10;B) metal&#10;C) gas&#10;D) liquid

Accepted Answer

The answer of X-rays result when cathode rays strike _____.&#10;A)...

Question 12

Once an arc is started in a gas, the voltage required to maintain conduction is _____.&#10;A) the same&#10;B) one-half&#10;C) reduced&#10;D) double

Accepted Answer

The answer of Once an arc is started in a...

Question 13

Who discovered and named X-rays?&#10;A) George Ohm&#10;B) Wilhelm Roentgen&#10;C) Gustav Kirchhoff&#10;D) J.J. Thomson

Accepted Answer

The answer of Who discovered and named X-rays?&#10;A) George Ohm&#10;B)...

Question 14

What is the process of depositing one type of metal onto another using electricity?&#10;A) electrolysis&#10;B) electroplating&#10;C) electrolyte&#10;D) ionization

Accepted Answer

The answer of What is the process of depositing one...

Question 15

What is the process of separating elements electrically?&#10;A) electroplating&#10;B) electrolysis&#10;C) ionizing

Accepted Answer

The answer of What is the process of separating elements...

Question 16

What term refers to the amount of voltage an electron must possess to cause ionization?&#10;A) electrolysis point&#10;B) ion point&#10;C) electron impact&#10;D) ionization potential

Accepted Answer

The answer of What term refers to the amount of...

Question 17

One of the most common uses for electroplating is the production of pure _____.

Accepted Answer

The answer of One of the most common uses for...

Question 18

What is the most important factor in ionization of a gas?&#10;A) electrolysis&#10;B) electron impact&#10;C) ionization&#10;D) electroplating

Accepted Answer

The answer of What is the most important factor in...

Deck 12: Conduction in Liquids and Gases