What is happening when two objects are rubbed together and static electricity results?

When certain combinations of materials are rubbed together, the rubbing action transfer electrons from the atoms of one material to the atoms of the other. This imbalance of electrons leaves the former material with a positive charge and the latter with a negative charge.

When certain combinations of materials are pushed together, the pushing action transfers electrons from the atoms of one material to the atoms of the other. This imbalance of electrons leaves the former material with a positive charge and the latter with a negative charge.

It is much easier to electrically “charge” an atom than it is to alter its chemical identity (say, from lead into gold). What does this fact indicate about the relative mobility of the elementary particles within an atom? Reveal answer

Electrons are much easier to remove from or add to an atom than protons are. The reason for this is also the solution to the paradox of why protons bind together tightly in the nucleus of an atom despite their identical electrical charges.

Protons are much easier to remove from or add to an atom than Neutrons are. The reason for this is also the solution to the paradox of why Neutrons bind together tightly in the nucleus of an atom despite their identical electrical charges.

Neutrons are much easier to remove from or add to an atom than protons are. The reason for this is also the solution to the paradox of why protons bind together tightly in the nucleus of an atom despite their identical electrical charges.

Protons are much easier to remove from or add to an atom than electrons are. The reason for this is also the solution to the paradox of why electrons bind together tightly in the nucleus of an atom despite their identical electrical charges.

Explain what the electrical terms voltage , current , and resistance mean, using your own words.

Voltage: electrical “pressure” between two different points or locations. Current: the flow of electrons. Resistance: opposition, or “friction,” to the flow of electrons.

Current: electrical “pressure” between two different points or locations. Voltage: the flow of electrons. Resistance: opposition, or “friction,” to the flow of electrons. Voltage, current and resistance is related through Ohm’s Law.

Resistance: electrical “pressure” between two different points or locations. Current: the flow of electrons. Voltage: opposition, or “friction,” to the flow of electrons. Voltage, current and resistance is related through Ohm’s Law.

Voltage: electrical “pressure” between two different points or locations. Resistance: the flow of electrons. Current: opposition, or “friction,” to the flow of electrons. Voltage, current and resistance is related through Ohm’s Law.

What is the difference between materials classified as conductors versus those classified as insulators , in the electrical sense of these words?

Electrical conductors offer easy passage of electric current through them, while electrical insulators do not.

Electrical insulators offer easy passage of electric current through them, while electrical conductors do not.

Identify several substances that are good conductors of electricity, and several substances that are good insulators of electricity.

Conductor: Metal; Insulator: Rubber

Conductor: Metal; Insulator: Graphite

Conductor: Paper; Insulator: Rubber

Conductor: Rubber; Insulator: Metal

In the simplest terms you can think of, define what an electrical circuit is.

An electrical circuit is any continuous path for electrons to flow away from a source of electrical potential (voltage) and back again.

An electrical circuit is any non-continuous path for electrons to flow away from a source of electrical potential (voltage) and back again.

What is the difference between DC and AC electricity? Identify some common sources of each type of electricity.

DC is an acronym meaning Direct Current : that is, electrical current that moves in one direction only. AC is an acronym meaning Alternating Current : that is, electrical current that periodically reverses direction (“alternates”).

AC is an acronym meaning Direct Current : that is, electrical current that moves in one direction only. DC is an acronym meaning Alternating Current : that is, electrical current that periodically reverses direction (“alternates”).

DC is an acronym meaning Alternating Current : that is, electrical current that moves in one direction only. AC is an acronym meaning Direct Current : that is, electrical current that periodically reverses direction.

Suppose you are building a cabin far away from electric power service, but you desire to have electricity available to energize light bulbs, a radio, a computer, and other useful devices. Determine at least three different ways you could generate electrical power to supply the electric power needs at this cabin.

• Engine-driven generator • Solar cell • Thermopile

• Engine-driven generator • Solar cell • Battery

Where does the electricity come from that powers your home, or your school, or the streetlights along roads, or the many business establishments in your city? You will find that there are many different sources and types of sources of electrical power. In each case, try to determine where the ultimate source of that energy is. For example, in a hydroelectric dam, the electricity is generated when falling water spins a turbine, which turns an electromechanical generator. But what continually drives the water to its “uphill” location so that the process is continuous? What is the ultimate source of energy that is being harnessed by the dam?

Hydroelectric dams • Nuclear power plants • Coal and oil fired power plants; yes

Hydroelectric dams • Nuclear power plants • Coal and oil fired power plants; no

Given a battery and a light bulb, show how you would connect these two devices together with wire so as to energize the light bulb:

Use a wire and tie it or tape it to each terminal (positive and negative) so it is a closed circuit. Do the same with the light bulb, as it should have to things where you can connect the wire.

Use a wire and put both on one terminal and then connect the one part to the light bulb, again to only one part of the terminal of the light bulb.

Use a wire and put both on each terminal and then connect the one part to the light bulb, to only one part of the terminal of the light bulb.

Most electrical wire is covered in a rubber or plastic coating called insulation . What is the purpose of having this “insulation” covering the metal wire?

The purpose of insulation covering the metal part of an electrical wire is to prevent accidental contact with other conductors of electricity, which might result in an unintentional electric current through those other conductors.

The purpose of insulation is to expose the metal part of an electrical wire is to allow accidental contact with other conductors of electricity, which should result in an unintentional electric current through those other conductors.

In the early days of electrical wiring, wires used to be insulated with cotton . This is no longer accepted practice. Explain why.

Cotton, like many natural fibers, is an electrical insulator until becomes wet!: true

Shown here is a simplified representation of an electrical power plant and a house, with the source of electricity shown as a battery, and the only electrical “load” in the house being a single light bulb: Why would anyone use two wires to conduct electricity from a power plant to a house, as shown, when they could simply use one wire and a pair of ground connections, like this?

Because earth (dirt) is not a good enough conductor

Because the dirt acts like a resistor and takes away most of the energy from the user

What, exactly, is a short circuit ? What does it mean if a circuit becomes shorted ? How does this differ from an open circuit? Reveal answer

A short circuit is a circuit having very little resistance, permitting large amounts of current. If a circuit becomes shorted , it means that a path for current formerly possessing substantial resistance has been bypassed by a path having negligible (almost zero) resistance. Conversely, an open circuit is one where there is a break preventing any current from going through at all.

A open circuit is a circuit having very little resistance, permitting large amounts of current. If a circuit becomes shorted , it means that a path for current formerly possessing substantial resistance has been bypassed by a path having negligible (almost zero) resistance. Conversely, an closed circuit is one where there is a break preventing any current from going through at all.

When lightning strikes, nearby magnetic compass needles may be seen to jerk in response to the electrical discharge. No compass needle deflection results during the accumulation of electrostatic charge preceding the lightning bolt, but only when the bolt actually strikes. What does this phenomenon indicate about voltage, current, and magnetism?

The presence of an electric current will produce a magnetic field, but the mere presence of a voltage will not.

The presence of an electric current will not produce a magnetic field, but the mere presence of a voltage will do so.

What do you think might happen if someone were to gently tap on the cone of one of these speakers? What would the other speaker do? In terms of electromagnetism and electromagnetic induction, explain what is happening.

The two speakers would call and receive messages from each message. This means that the field is in turn attracted to and repelled from the permanent magnet, vibrating back and forth. True

Suppose someone mechanically couples an electric motor to an electric generator, then electrically couples the two devices together in an effort to make a perpetual-motion machine: Why won’t this assembly spin forever, once started?

This will not work because electric power to the motor is coming from the output of generator. This means it is a perpetual machine, which is impossible.

This will not work because neither the motor nor the generator is 100% efficient.

It can spin forever once started

This will not work as the the motor cannot electrically power the generator.

Electrical 101 Quiz

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the purpose of the switch shown in this schematic diagram?

To increase the voltage of the current

To decrease the voltage of the current

It does nothing

To establish or interrupt the electrical current of the circuit in order to control the light bulb.

Tags

NGSS.MS-ETS1-1

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What difference will it make if the switch is located in either of these two alternate locations in the circuit?

It makes no difference at all

The switch on the positive side can conduct the electricity at any type of voltage

The switch on the negative side cannot conduct any electricity

The switch is able better be able to stop and allow the flow of electricity

3.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Does this switch (in the closed state) have a low resistance or a high resistance between its terminals?

The closed switch has a low resistance

The closed switch has a high resistance

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How might you use a meter (or a conductivity/continuity tester) to determine whether this electrical switch is in the open or closed state?

By measuring the resistance of the switch

By measuring in between the the two screw terminals

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Determine if the light bulb will de-energize for each of the following breaks in the circuit. Consider just one break at a time:

DE, no effect, no effect, no effect, DE, no effect

No effect, no effect, no effect, no effect, no effect, no effect

DE, DE, DE, DE, DE, DE

No effect, DE, no effect, DE, no effect, DE

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Shown here is a simplified representation of an atom: the smallest division of matter that may be isolated through physical or chemical methods.

Inside of each atom are several smaller bits of matter called particles. Identify the three different types of “elementary” particles inside an atom, their electrical properties, and their respective locations within the atom.
Reveal answer

All of them have a negative charge and are all in the center

All of them have a positive charge and are all in the outside ring

Neutrons reside in the center (“nucleus”) of the atom, as do protons. Neutrons are electrically neutral (no charge), while protons have a positive electrical charge. Electrons, which reside outside the nucleus, have negative electrical charges.

Neutrons reside outside of the nucleus, and have no charge. Protons reside in the center of atom, and have a positive charge. Electrons reside in the outside of the nucleus and have a negative charge

Tags

NGSS.MS-PS1-1

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Different types of atoms are distinguished by different numbers of elementary particles within them. Determine the numbers of elementary particles within each of these types of atoms:
• Carbon
• Hydrogen
• Helium
• Aluminum
Hint: look up each of these elements on a periodic table.
Reveal answer

Carbon: 6,6,6; Hydrogen: 1,1,0; Helium: 2,2,2; Aluminum: 13,13,14

Carbon: 5,6,6; Hydrogen: 8,1,0; Helium: 2,7,2; Aluminum: 13,13,5

Carbon: 8,8,6; Hydrogen: 1,1,5; Helium: 4,4,2; Aluminum: 13,13,1

Carbon: 8,8,8; Hydrogen: 9,9,3; Helium: 2,2,2; Aluminum: 13,13,14

Tags

NGSS.MS-PS1-1

8.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Of the three types of “elementary particles” constituting atoms, determine which type(s) influence the following properties of an element:
**• The chemical identity of the atoms (whether it is an atom of nitrogen, iron, silver, or some other element).**
• The mass of the atom.
• The electrical charge of the atom.
• Whether or not it is radioactive (spontaneous disintegration of the nucleus).
Reveal answer

neutrons; neutrons and electrons, >electrons; neutrons and protons; neutrons

Protons; neutrons and protons, >electrons; electrons and protons; electrons and protons

Protons; neutrons and protons, >electrons; electrons and protons; neutrons

electrons; electrons and protons, >electrons; electrons and electrons; neutrons

Tags

NGSS.HS-PS1-3

NGSS.HS-PS1-8

9.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The Greek word for amber (fossilized resin) is elektron. Explain how this came to be the word describing a certain type of subatomic particle (electron).
Reveal answer

When a piece of amber is rubbed with a cloth, a static electric charge develops on both objects. Early experimenters postulated the existence of an invisible fluid that was transferred between the amber and the cloth. Later, it was discovered that tiny sub-atomic particles constituted this “fluid,” and the name electron was given to them.

When a piece of amber is rubbed with a cloth, a static electric charge develops on both objects. Later, it was discovered that tiny sub-atomic particles constituted this “fluid,” and the name electron was given to them.

Tags

NGSS.HS-PS3-5

10.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What does it mean for an object to have an electric charge? Give an example of an object receiving an electric charge, and describe how that charged object might behave.
Reveal answer

For an object to be electrically charged, it must have either a deficit of electrons among its atoms.

For an object to be electrically charged, it must have either a surplus of electrons among its atoms.

For an object to be electrically charged, it must have either a surplus or a deficit of electrons among its atoms.

For an object to be electrically charged, it must have electrons among its atoms.

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Electrical 101

38 questions

What is the purpose of the switch shown in this schematic diagram?

What difference will it make if the switch is located in either of these two alternate locations in the circuit?

Does this switch (in the closed state) have a low resistance or a high resistance between its terminals?

How might you use a meter (or a conductivity/continuity tester) to determine whether this electrical switch is in the open or closed state?

Determine if the light bulb will de-energize for each of the following breaks in the circuit. Consider just one break at a time:

The Greek word for amber (fossilized resin) is elektron. Explain how this came to be the word describing a certain type of subatomic particle (electron).
Reveal answer

What does it mean for an object to have an electric charge? Give an example of an object receiving an electric charge, and describe how that charged object might behave.
Reveal answer

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Electrical 101

38 questions

What is the purpose of the switch shown in this schematic diagram?

What difference will it make if the switch is located in either of these two alternate locations in the circuit?

Does this switch (in the closed state) have a low resistance or a high resistance between its terminals?

How might you use a meter (or a conductivity/continuity tester) to determine whether this electrical switch is in the open or closed state?

Determine if the light bulb will de-energize for each of the following breaks in the circuit. Consider just one break at a time:

Different types of atoms are distinguished by different numbers of elementary particles within them. Determine the numbers of elementary particles within each of these types of atoms:• Carbon• Hydrogen• Helium• AluminumHint: look up each of these elements on a periodic table.Reveal answer

The Greek word for amber (fossilized resin) is elektron. Explain how this came to be the word describing a certain type of subatomic particle (electron).Reveal answer

What does it mean for an object to have an electric charge? Give an example of an object receiving an electric charge, and describe how that charged object might behave.Reveal answer

Create a free account and access millions of resources

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Physics

The Greek word for amber (fossilized resin) is elektron. Explain how this came to be the word describing a certain type of subatomic particle (electron).
Reveal answer

What does it mean for an object to have an electric charge? Give an example of an object receiving an electric charge, and describe how that charged object might behave.
Reveal answer