Electronics (Villamor Test I Part I)

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| By Imbanoob

Imbanoob

Community Contributor

Quizzes Created: 3 | Total Attempts: 2,500

Questions: 14 | Attempts: 76 | Updated: Jul 27, 2023

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Questions and Answers

1.

What composes all matter whether a liquid, solid, or gas?
- A.
  
  Atoms
- B.
  
  Electrons
- C.
  
  Neutrons
- D.
  
  Protons
Correct Answer
A. Atoms

Explanation
Atoms are the fundamental building blocks of all matter, whether it is in the form of a liquid, solid, or gas. Atoms are composed of three main subatomic particles: electrons, neutrons, and protons. Electrons are negatively charged particles that orbit around the nucleus of an atom. Neutrons are neutral particles found in the nucleus, and protons are positively charged particles also located in the nucleus. Together, these particles make up the structure of atoms, which in turn make up all forms of matter.

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2.

Which of the following is not a basic part of an atom?
- A.
  
  Electron
- B.
  
  Proton
- C.
  
  Neutron
- D.
  
  Coulomb
Correct Answer
D. Coulomb

Explanation
Coulomb is not a basic part of an atom. An atom consists of three basic particles: electrons, protons, and neutrons. Electrons are negatively charged particles that orbit the nucleus of an atom. Protons are positively charged particles found in the nucleus, and neutrons are neutral particles also found in the nucleus. Coulomb, on the other hand, is a unit of electric charge and is not a fundamental particle of an atom.

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3.

What is the smallest element of a matter?
- A.
  
  Atom
- B.
  
  Molecule
- C.
  
  Crystal
- D.
  
  Wafer
Correct Answer
A. Atom

Explanation
An atom is the smallest unit of matter that retains the chemical properties of an element. It consists of a nucleus, which contains protons and neutrons, and electrons orbiting around the nucleus. Atoms combine to form molecules, crystals, and other structures, but an individual atom is considered the smallest building block of matter. Therefore, the smallest element of matter is an atom.

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4.

To determine whether a material can support the flow of electricity or not, we need to examine its
- A.
  
  Atomic structure
- B.
  
  Physical state
- C.
  
  Molecular structure
- D.
  
  Chemical composition
Correct Answer
A. Atomic structure

Explanation
To determine whether a material can support the flow of electricity or not, we need to examine its atomic structure. The arrangement and behavior of atoms in a material determine its electrical conductivity. Materials with free or loosely bound electrons in their atomic structure are good conductors of electricity, while materials with tightly bound electrons are insulators. Therefore, understanding the atomic structure of a material is crucial in determining its ability to support the flow of electricity.

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5.

Approximate diameter of an atom
- A.
  
  A. 10^-10 µµm
- B.
  
  B. 10^-10 µm
- C.
  
  C. 10^-10 mm
- D.
  
  D. 10^-10 m
Correct Answer
D. D. 10^-10 m

Explanation
The approximate diameter of an atom is on the order of 10^-10 meters. Atoms are incredibly small, with their size typically measured in nanometers or picometers. The given answer of 10^-10 meters falls within this range and is a commonly accepted approximation for the diameter of an atom.

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6.

The lightest kind of atom or element
- A.
  
  Helium
- B.
  
  Oxygen
- C.
  
  Hydrogen
- D.
  
  Titanium
Correct Answer
C. Hydrogen

Explanation
Hydrogen is the lightest kind of atom or element because it has the smallest atomic mass. It consists of only one proton and one electron, making it the simplest and lightest element on the periodic table. Helium, oxygen, and titanium all have larger atomic masses compared to hydrogen, making them heavier elements.

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7.

Known as the simplest type of atom.
- A.
  
  Oxygen
- B.
  
  Hydrogen
- C.
  
  Nitrogen
- D.
  
  Helium
Correct Answer
B. Hydrogen

Explanation
Hydrogen is known as the simplest type of atom because it consists of only one proton and one electron. It is the lightest and most abundant element in the universe. Hydrogen is the building block for all other elements and is essential for the formation of stars and galaxies. It is also a key component of water and many organic compounds.

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8.

Approximate diameter of a Hydrogen atom
- A.
  
  1.1 x 10^-10 µµm
- B.
  
  1.1 x 10^-10 µm
- C.
  
  1.1 x 10^-10 mm
- D.
  
  1.1 x 10^-10 m
Correct Answer
B. 1.1 x 10^-10 µm

Explanation
The approximate diameter of a Hydrogen atom is 1.1 x 10^-10 µm. This measurement is given in micrometers, which is a unit of length equal to one millionth of a meter.

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9.

A commonly used model in predicting the atomic structure of a material.
- A.
  
  String model
- B.
  
  Wave model
- C.
  
  Particle model
- D.
  
  Bohr model
Correct Answer
D. Bohr model

Explanation
The Bohr model is a commonly used model in predicting the atomic structure of a material. It was proposed by Niels Bohr in 1913 and is based on the idea that electrons orbit the nucleus in specific energy levels or shells. This model successfully explains many phenomena, such as the emission and absorption spectra of elements. However, it has limitations and is not completely accurate for more complex atoms. Nonetheless, the Bohr model laid the foundation for the development of modern quantum mechanics.

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10.

Is at the center of an atomic structure in a Bohr model.
- A.
  
  Electrons
- B.
  
  Protons
- C.
  
  Neutrons
- D.
  
  Nucleus
Correct Answer
D. Nucleus

Explanation
In a Bohr model of an atomic structure, the nucleus is at the center. The nucleus contains protons and neutrons, which are tightly packed together. Electrons revolve around the nucleus in specific energy levels or shells. Therefore, the correct answer is nucleus.

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11.

The nucleus of an atom is normally
- A.
  
  Neutral
- B.
  
  Positively charged
- C.
  
  Negatively charged
- D.
  
  Either positively or negatively charged
Correct Answer
A. Neutral

Explanation
The nucleus of an atom is normally neutral because it contains an equal number of positively charged protons and negatively charged electrons. The positive charge of the protons cancels out the negative charge of the electrons, resulting in a neutral overall charge for the nucleus.

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12.

What particles that revolve around the positive nucleus?
- A.
  
  Electrons
- B.
  
  Protons
- C.
  
  Neutrons
- D.
  
  Electrons & protons
Correct Answer
A. Electrons

Explanation
Electrons are the particles that revolve around the positive nucleus. They have a negative charge and are attracted to the positive charge of the nucleus. Electrons are found in energy levels or shells around the nucleus and play a crucial role in chemical reactions and the formation of chemical bonds. Protons, on the other hand, are positively charged particles that are present in the nucleus, while neutrons have no charge and are also found in the nucleus.

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13.

In electricity, positive electric charge refers to ____________.
- A.
  
  Protons
- B.
  
  Neutrons
- C.
  
  Electrons
- D.
  
  Atoms
Correct Answer
A. Protons

Explanation
Positive electric charge refers to protons because protons are subatomic particles that carry a positive charge. In an atom, protons are found in the nucleus, along with neutrons, while electrons orbit around the nucleus. Protons play a crucial role in determining the overall charge of an atom, as the number of protons in an atom's nucleus determines its atomic number and identifies the element. Therefore, positive electric charge is associated with protons in electricity.

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14.

What is the charge of an electron?
- A.
  
  1.6022 x 10^-19 C
- B.
  
  9.1096 x 10^-19 C
- C.
  
  1.6022 x 10^-31 C
- D.
  
  9.1096 x 10^-31 C
Correct Answer
A. 1.6022 x 10^-19 C

Explanation
The charge of an electron is 1.6022 x 10^-19 C. This is the correct answer because it is a well-known and accepted value in physics. The charge of an electron is a fundamental constant and is a basic property of electrons. It is commonly used in equations and calculations involving electricity and magnetism.

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Electronics (Villamor Test I Part I)

What composes all matter whether a liquid, solid, or gas?

Which of the following is not a basic part of an atom?

What is the smallest element of a matter?

To determine whether a material can support the flow of electricity or not, we need to examine its

Approximate diameter of an atom

The lightest kind of atom or element

Known as the simplest type of atom.

Approximate diameter of a Hydrogen atom

A commonly used model in predicting the atomic structure of a material.

Is at the center of an atomic structure in a Bohr model.

The nucleus of an atom is normally

What particles that revolve around the positive nucleus?

In electricity, positive electric charge refers to ____________.

What is the charge of an electron?