Question 1

In general, there are two ways in which the sun's energy is converted into electricity:
A)photovoltaic and photothermal
B)photovoltaic and photochemical
C)photovoltaic and photosynthetic
D)none of the above

Accepted Answer

The two primary methods for converting the sun's energy into electricity are photovoltaic, which directly converts light into electricity using semiconducting materials, and photothermal (or solar thermal), which converts sunlight into thermal energy (heat) that is then used to generate electricity, typically through steam turbines.

Question 2

The law that states that at any given time, the sum of the currents entering a node must equal the sum of the currents leaving the node is know as
A)Kirchoff's current law
B)Kirchoff's voltage law
C)Ohm's law
D)Coulomb's law

Accepted Answer

Kirchoff's current law states that the algebraic sum of currents meeting at any node (or junction) in an electrical circuit is zero. It is also known as Kirchoff's first law or the law of conservation of charge.

Question 3

Which subatomic particle has no charge?
A)Proton
B)Neutron
C)Electron
D)Ion

Accepted Answer

Neutron has no charge. Protons have a positive charge, electrons have a negative charge, and ions are charged atoms or molecules due to the loss or gain of electrons.

Question 4

Ohm's law describes the relationship between voltage, resistance, and current.Which of these is Ohm's law? a. $V = \frac { R } { I }$

b. $V = \frac { I } { R }$

c. $V = I R$

d. $R = V I$

Accepted Answer

The answer of Ohm's law describes the relationship between voltage,...

Question 5

A numbering system that describes the size of an electric conductor is AWG.What does AWG stand for?
A)American Wire Gage
B)Association of Wire Gages
C)Atlas of Wire Gages
D)All Wires are Good

Accepted Answer

AWG stands for American Wire Gage.

Question 6

Which subatomic particle has a positive charge?
A)Proton
B)Neutron
C)Electron
D)Ion

Accepted Answer

Protons have a positive charge, while neutrons have no charge and electrons have a negative charge. Ions can have a positive or negative charge depending on whether they have lost or gained electrons.

Question 7

Some materials exhibit near-zero resistance at very low temperatures.This behavior is called
A)infra-resistance
B)anti-resistance
C)semiconductivity
D)superconductivity

Accepted Answer

The behavior described is superconductivity.

Question 8

Which subatomic particle has a negative charge?
A)Proton
B)Neutron
C)Electron
D)Ion

Accepted Answer

Electrons have a negative charge.

Question 9

Opposite charges repel each other and like charges attract each other.

Accepted Answer

Opposite charges attract each other, and like charges repel each other.

Question 10

Electric current is a fundamental dimension.

Accepted Answer

Electric current is a fundamental dimension and is measured in amperes (A).

Question 11

The SI unit for electric current is
A)amperes
B)electrons per second
C)coulombs
D)watts

Accepted Answer

The SI unit for electric current is amperes, which are defined as the flow of electric charge per unit time.

Question 12

The amount of work required to move charge between two points is represented by
A)electric current
B)resistance
C)voltage
D)energy

Accepted Answer

The amount of work required to move charge between two points is represented by voltage.

Question 13

The flow of electric charge that occurs in one direction that is typically produced by batteries is known as
A)ac current
B)dc current
C)ac/dc current
D)unidirectional current

Accepted Answer

The flow of electric charge that occurs in one direction, which is typically produced by batteries, is known as a direct current (DC) current. Therefore, option B is the best choice. Option A is incorrect because alternating current (AC) flows in both directions. Option C is incorrect because AC/DC current refers to a device's ability to accept both AC and DC currents. Option D is not a commonly used term in electrical engineering.

Question 14

Which of the following batteries is an example of a primary cell?
A)Nickel-cadmium (NiCd) also known as "nicad"
B)Nickel-metal hydride (NiMH)
C)Alkaline
D)Lead acid

Accepted Answer

Alkaline batteries are an example of primary cells, meaning they cannot be recharged and instead must be replaced once they have exhausted their energy. NiCd, NiMH, and lead-acid batteries are all examples of secondary cells, which can be recharged and reused.

Question 15

When it comes to wire size, the larger the gage number the larger the wire diameter.

Accepted Answer

The larger the gauge number, the smaller the wire diameter.

Question 16

The flow of electric charge that periodically reverses direction that is typically produced by rotating generators is known as
A)ac current
B)dc current
C)ac/dc current
D)omni directional current

Accepted Answer

The flow of electric charge that periodically reverses direction is known as AC (alternating current) current. This type of current is typically produced by rotating generators. Option B) is incorrect as DC (direct current) flows in only one direction. Option C) is not a valid term as AC and DC are two distinct types of current. Option D) is not a term used to describe electric current.

Question 17

In all batteries, electricity is produced by
A)light
B)heat
C)a chemical reaction
D)all of the above

Accepted Answer

Batteries work through a chemical reaction, where the transfer of electrons between different chemicals produces an electric current. Light and heat can also cause electrical reactions, but these methods are not used in typical batteries.

Question 18

Electrical resistance is a fundamental dimension.

Accepted Answer

Electrical resistance is not a fundamental dimension; it is derived from fundamental dimensions such as length, mass, time, and electric current.

Question 19

The electrical resistance of a material varies with temperature.

Accepted Answer

This is a well-known physical property of materials, known as the temperature coefficient of resistance. As the temperature of a material increases, so does its resistance.

Question 20

Primary cells are batteries that can be recharged while secondary cells are batteries that
cannot be recharged.

Accepted Answer

The statement is incorrect. Primary cells are batteries that cannot be recharged and are designed for single use, while secondary cells are batteries that can be recharged and used multiple times.

Quiz 12: Electric Current and Related Parameters

In general, there are two ways in which the sun's energy is converted into electricity:

The law that states that at any given time, the sum of the currents entering a node must equal the sum of the currents leaving the node is know as

Which subatomic particle has no charge?

Ohm's law describes the relationship between voltage, resistance, and current.Which of these is Ohm's law? a. V=RIV = \frac { R } { I }V=IR​ b. V=IRV = \frac { I } { R }V=RI​ c. V=IRV = I RV=IR d. R=VIR = V IR=VI

A numbering system that describes the size of an electric conductor is AWG.What does AWG stand for?

Which subatomic particle has a positive charge?

Some materials exhibit near-zero resistance at very low temperatures.This behavior is called

Which subatomic particle has a negative charge?

Opposite charges repel each other and like charges attract each other.

Electric current is a fundamental dimension.

The SI unit for electric current is

The amount of work required to move charge between two points is represented by

The flow of electric charge that occurs in one direction that is typically produced by batteries is known as

Which of the following batteries is an example of a primary cell?

When it comes to wire size, the larger the gage number the larger the wire diameter.

The flow of electric charge that periodically reverses direction that is typically produced by rotating generators is known as

In all batteries, electricity is produced by

Electrical resistance is a fundamental dimension.

The electrical resistance of a material varies with temperature.

Primary cells are batteries that can be recharged while secondary cells are batteries that cannot be recharged.

Ohm's law describes the relationship between voltage, resistance, and current.Which of these is Ohm's law? a. $V = \frac { R } { I }$ b. $V = \frac { I } { R }$ c. $V = I R$ d. $R = V I$