In an atom, what electrons contain the most energy?

The energy is shared equally by all electrons

What are the factors that affect the resistance of a material?

Area, temperature, and type of material.

Area, weight, and state of material.

Area, temperature, and type of material.

Temperature, weight, and state of material.

Temperature, type of material, and state of material.

What is the difference between an open and a short?

No current flow in an open circuit; excessive current flow in a shorted component.

An open causesresistance to decrease; a short causes resistance to increase.

Excessive current flow in an open circuit; no current flow in a shorted component.

No current flow in an open circuit; excessive current flow in a shorted component.

Minimum voltage development across the open component; maximum voltage development across the shorted component.

Electrical Theory And Generators

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| Written by Sizzleld

Sizzleld

Community Contributor

Total Contribution - 1 | Total attempts - 106

Questions: 15 | Attempts: 106 | Updated: Mar 22, 2023

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Questions and Answers

1.

What is the simplest form of matter?
- A.
  
  Element
- B.
  
  Mixture
- C.
  
  Compound
- D.
  
  Electrons
Correct Answer
A. Element

Explanation
(1-1) An Element Is the simplest form of matter.

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2.

A _____ is a combination of two or more substances without using a chemical reaction.
- A.
  
  Element
- B.
  
  Mixture
- C.
  
  Compound
- D.
  
  Electrons
Correct Answer
B. Mixture

Explanation
(1-1) A Mixture is a combination of two or more substances without using a chemical reaction.

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3.

A _____ is two or more elements combined in definite portions by chemical means to form another substance.
- A.
  
  Mixture
- B.
  
  Compound
- C.
  
  Electrons
- D.
  
  Element
Correct Answer
B. Compound

Explanation
(1-1) A compound is two or more elements combined in definite portions by chemical means to form another substance.

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4.

In an atom, what electrons contain the most energy?
- A.
  
  The energy is shared equally by all electrons
- B.
  
  Orbiting electrons
- C.
  
  Valence electrons
- D.
  
  K shell electrons
Correct Answer
C. Valence electrons

Explanation
(1-2) Valence electrons contain the most energy.

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5.

Atoms having more than four electrons, but less than eight are known as
- A.
  
  Insulators.
- B.
  
  Conductors.
- C.
  
  Stable atoms.
- D.
  
  Semiconductors.
Correct Answer
A. Insulators.

Explanation
(1-3) Atoms having more than four electrons, but less than eight are known as insulators.

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6.

Atoms having only four electrons are known as
- A.
  
  Insulators.
- B.
  
  Conductors.
- C.
  
  Stable atoms.
- D.
  
  Semiconductors.
Correct Answer
D. Semiconductors.

Explanation
(1-3) Atoms having only four electrons are known as semiconductors.

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7.

Atoms having only eight electrons are known as
- A.
  
  Insulators.
- B.
  
  Conductors.
- C.
  
  Stable atoms.
- D.
  
  Semiconductors.
Correct Answer
C. Stable atoms.

Explanation
(1-2) If the atom has eight electrons in its outermost shell, it is stable.

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8.

The electrostatic field around a positive ion moves
- A.
  
  Inward.
- B.
  
  Outward.
- C.
  
  Inward, then outward.
- D.
  
  Outward, then inward.
Correct Answer
B. Outward.

Explanation
(1-3) In a positive ion, the electrostatic field moves outwards.

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9.

The electrostatic field around a negative ion moves
- A.
  
  Inward.
- B.
  
  Outward.
- C.
  
  Inward, then outward.
- D.
  
  Outward, then inward.
Correct Answer
A. Inward.

Explanation
(1-3) In a negative ion, there are electrostatic fields that move inwards.

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10.

What are the factors that affect the resistance of a material?
- A.
  
  Area, weight, and state of material.
- B.
  
  Area, temperature, and type of material.
- C.
  
  Temperature, weight, and state of material.
- D.
  
  Temperature, type of material, and state of material.
Correct Answer
B. Area, temperature, and type of material.

Explanation
(1-6) Several factors, such as material type, area, and temperature are used to determine the amount of resistance placed on a material.

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11.

What is the resistance in a circuit if the power rating is 40 watts and total current is 2 amps?
- A.
  
  40 ohms
- B.
  
  20 ohms
- C.
  
  10 ohms
- D.
  
  0.5 ohms
Correct Answer
C. 10 ohms

Explanation
(1-9) To get Resistance in the circuit, you square the current to make a whole number, then you divide it by the power.

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12.

Convert 500 milliamps to standard amperage.
- A.
  
  .005 amps
- B.
  
  .05 amps
- C.
  
  .5 amps
- D.
  
  50 amps
Correct Answer
A. .005 amps

Explanation
(1-8) Milli is the decimal equivalent of .001

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13.

In a series-parallel circuit, find RT if series resistor R1=7 ohms, and parallel resistor R2 and R3=8 ohms.
- A.
  
  23 ohms
- B.
  
  15 ohms
- C.
  
  11 ohms
- D.
  
  8 ohms
Correct Answer
C. 11 ohms

Explanation
(1-12) In order to find RT start with the paralell branches to find the total resistance. Once reduced to to the equivalent of the series circuit, add it up with the other series branches to find the sum.

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14.

What is the difference between an open and a short?
- A.
  
  An open causesresistance to decrease; a short causes resistance to increase.
- B.
  
  Excessive current flow in an open circuit; no current flow in a shorted component.
- C.
  
  No current flow in an open circuit; excessive current flow in a shorted component.
- D.
  
  Minimum voltage development across the open component; maximum voltage development across the shorted component.
Correct Answer
C. No current flow in an open circuit; excessive current flow in a shorted component.

Explanation
(1-19) A short causes an excessive amount of current flow, whereas an open stops current flow.

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15.

Voltage induced into a conductor by the expanding and collapsing of a magnetic field is...
- A.
  
  Magnetism.
- B.
  
  Reluctance.
- C.
  
  Direct current.
- D.
  
  Electromagnetic induction.
Correct Answer
D. Electromagnetic induction.

Explanation
When a magnetic field expands or collapses around a conductor, it induces a voltage in the conductor. This phenomenon is known as electromagnetic induction. It is the process by which a changing magnetic field creates an electric current in a conductor. Therefore, the correct answer is electromagnetic induction.

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Electrical Theory And Generators

What is the simplest form of matter?

A _____ is a combination of two or more substances without using a chemical reaction.

A _____ is two or more elements combined in definite portions by chemical means to form another substance.

In an atom, what electrons contain the most energy?

Atoms having more than four electrons, but less than eight are known as

Atoms having only four electrons are known as

Atoms having only eight electrons are known as

The electrostatic field around a positive ion moves

The electrostatic field around a negative ion moves

What are the factors that affect the resistance of a material?

What is the resistance in a circuit if the power rating is 40 watts and total current is 2 amps?

Convert 500 milliamps to standard amperage.

In a series-parallel circuit, find RT if series resistor R1=7 ohms, and parallel resistor R2 and R3=8 ohms.

What is the difference between an open and a short?

Voltage induced into a conductor by the expanding and collapsing of a magnetic field is...