8.3-Electricity-STUDY GUIDE

Multiple Choice

A circuit has a switch, a wire, a battery, and a bulb. When the switch is flipped, the lights turn on. Which energy is used in this circuit when it is closed?

• Wind

• Chemical

• Electric

• Kinetic

Multiple Choice

A girl rubbed an air-filled balloon on her hair then put it on the wall and it stuck to it. What made the balloon stick to the wall?

• Static Electricity

• Wired Electricity

• Static Shock

• Balloon Power

Static Electricity

• Definition: Static electricity is the build-up of an electrical charge on the surface of an object. The reason that it's actually called static electricity is because the charges stay in one area for some time and don't flow or move to a different area.

• Rubbing the balloon on hair or even a carpet will allow it to stick to walls and even hair!

Multiple Choice

Name a material that makes the best conductor of electricity.

• Glass

• Rubber

• Wind

• Copper

Multiple Choice

What is the difference between a series circuit and a parallel circuit?

• In a series circuit, the electricity flows in multiple paths; in a parallel circuit, the electricity can follow more than one path.

• The electricity flows in one path for both.

• In a series circuit, the electricity flows in one path; in a parallel circuit, the electricity can follow more than one path.

• In a series circuit, the electricity flows in one path; in a parallel circuit, the electricity follows no path.

Multiple Select

What are three types of particles in an atom?

• Electric

• Electrons

• Protons

• Neutrons

Multiple Choice

Which has a negative charge?

• Protons

• Neutrons

• Electrons

Multiple Choice

Which has a positive charge?

• Electrons

• Neutrons

• Protons

Multiple Choice

Which has a neutral charge?

• Electrons

• Neutrons

• Protons

Fill in the Blank

If the charge is strong enough, static electricity___________ from one object to another

Fill in the Blank

Electric discharge- when __________ move quickly from one object to another.

Multiple Choice

What is the buildup of charges on an object called?

• Static electricity

• Series Circuit

• Positive Charges

• Negative Charges

Multiple Choice

When different electric charges come into contact with each other what happens?

• The different charges attract each other

• The different charges repel each other

• The charges don't change

Multiple Choice

Identify the charge of the electron

• Positive

• Neutral

• Negative

• No charge

Multiple Choice

Which of these would cause static electricity?

• Placing a sticker on a notebook

• Rubbing a balloon on your hair and then your hands stands up on end.

• A sticky note attached to a wall

Multiple Choice

Protons have a ______

• positive charge

• negative charge

• no charge

Multiple Choice

What causes charges to move in a circuit?

• Power

• Current

• Voltage

• Amperes

Multiple Choice

Most atoms have a charge of...

• 10

• 0

• 5

• 1

Multiple Choice

______ As a Negative Charge

• Electrons

• Protons

• Neutrons

• Atoms.

Multiple Choice

Which statement BEST describes the behavior of electric charges?

• Like charges attract

• Only unlike charges attract.

• Like charges repel and unlike charges attract.

Multiple Choice

whats static energy

• group of two or more cells for producing a direct current

• substance that forms ions when melted or disolved in water

• electric charge that builds up on an insulated charge

Multiple Choice

whats static discharge?

• sudden flow of electricty between two electrically charged objected caused by contact

• substance that form ions when melted or dissolved in water

• device that changes chemical energy to electrial energy

Multiple Choice

Static Electricity is.....

• Extra charge jumps off an object

• Charges are building up on an object

Multiple Choice

device that changes chemical energy to electrical energy

• battery

• electrochemical cell

• conductor

• electrolyte

Multiple Choice

a group of two or more vells for producing a direct current

• Static energy

• fuse

• volt

• battery

Multiple Choice

True or False? In order for a circuit to work, it must be CLOSED.

• True

• False

Multiple Choice

substance that forms ions when melged or dissolved in water

• electrolyte

• fuse

• ohm

Multiple Choice

substance or body that allows electricity heat or sound to pass along it or through it

• conductor

• insulator

Multiple Choice

What is the unit of measurement for voltage?

• Watts

• kWh

• Volts

• Amperes

Multiple Choice

Most atoms have a charge of 0 unless they are ____

• Electrolites

• Ions

• Atomic Nuclear numbers.

• Elements.

Multiple Select

Choose the TWO items that are considered to be CONDUCTORS.

Multiple Choice

The principle that describes that charge can transfer from one object to another. But the total amount of charge is constant.

• The Law of Electricity.

• The Law of Conservation.

• The Laws of Newtons.

• The Law of Batteries

Multiple Choice

Opposites charges ______

• Attract

• Oppose

Multiple Choice

Electrical discharge is......

• Charges build up on an object

• Extra charge jumps off the object

Multiple Choice

Like charges

• Repel

• Attract

Multiple Choice

____ is created when atoms gain or lose electrons

• Elements

• Atoms

• Electrolites

• Ions

Multiple Choice

Charges act on each other as a ______

• Measurement of how strong they are.

• Distance

Multiple Select

Choose the TWO examples of INSULATORS.

Multiple Choice

An electric field exerts ______ on charged particles.

• Storage

• Forces

• Energy

Multiple Choice

Transfer of direct contact is known as

• Conduction

• Induction

Multiple Choice

If a toaster uses 20 kW of power and runs for 2 hours, what is the total amount of energy used?

• 60 kilowatt-hours

• 10 kilowatt-hours

• 40 kilowatt-hours

• 15 kilowatt-hours

Multiple Choice

Electrons don't move easily through

• Insulators.

• Conductors

Multiple Choice

Rearrangement of electrons on a neutral object caused by a charged object is called

• Charging by induction

• Induction by charging

• Charging by Conduction

Multiple Choice

True or False? Lightening is an example of static electricity in nature.

• True

• False

Multiple Choice

Which of these is NOT a static discharge.

• Plug in.

• Shock.

• Lightning.

Multiple Choice

Using a Conductor to directly charge the ground is called

• Charging.

• Grounding

Multiple Choice

An example of static electricity is..

• getting shocked touching a door knob

• clothes not sticking together in dryer

• hair standing up on end

Multiple Choice

Electric Current is measured by..

• Newtons

• amperes

• Voltage

• Ohms

Match

Match the following

• Proton

• Neutron

• Electron

• Nucleus

Has a positive charge

Has NO charge, is neutral

Has a negative charge

In an atom, where the protons and neutron are.

• Has a positive charge

• Has NO charge, is neutral

• Has a negative charge

• In an atom, where the protons and neutron are.

Multiple Choice

Voltage is known as ______

• Energy

• Potential

• Strength

• Power

Multiple Choice

A voltage difference is a ____ that causes charge to move through a condcutor.

• Trust.

• Push

• Rush

• Bust

Multiple Choice

What happens to the resistance when the temperature of most conductors increases?

• The resistance will stay the same.

• The resistance will decrease.

• The resistance will increase.

Multiple Choice

Voltage is measured using a voltmeter and in units called.

• Volts

• Amps

Multiple Choice

What is the opposition to the flow of charge?

• Resistance

• Strength

• Yo mama

• Conductor.

Multiple Choice

What is the definition of an electric current?

• When a circuit stops

• Whatever makes electricity

• When electric charges flow from one place to another.

Multiple Choice

Resistance produces ____ and _____

• Power and light.

• Heat and Light

• Heat and power.

• Coldness and light.

Multiple Choice

Resistance is measured in..

• Watts

• ohms

• PSI

• Neutrons.

Multiple Choice

An example of electric discharge is...

• Clothes sticking together in dryer

• Hair standing up on end

• Getting shocked touching door knob

Multiple Select

What factors affect resistance of a wire

• Length

• Area/circumference

• material

Multiple Choice

Voltage and resistance are related to ____ law.

• Atoms

• Ohms

• Newtons

• Electrons

Multiple Choice

What TYPE of circuits are found in people's homes?

• Parallel

• Series

Multiple Choice

What is the definition of Ohm’s law?

• Current = Voltage/Resistance

• Resistance = Voltage / Current

• Voltage = Current/Resistance

Multiple Choice

Which is an example of a CLOSED circuit?

Multiple Choice

Conductors allow

• charges to flow

• charges to NOT flow easily

• trains to work

Multiple Choice

Which is an example of an OPEN circuit?

Multiple Choice

When the voltage is constant, the resistance in the current will _____________.

• increase

• decrease

• stay the same

Multiple Choice

Insulators

• do NOT allow charges to flow easily

• allow charges to flow

Multiple Choice

What is one disadvantage of using fuses?

• The fuse will melt when it gets too hot

• The fuse will be able to be reused

• When a fuse burns out, it cannot be used again

Multiple Choice

A 1.5 Volt battery produces more current than a 9 Volt battery

• True

• False

• There is no difference between the two

Multiple Choice

The electrons in an insulator are ___________ bound to their atoms.

• tightly

• loosely

Multiple Choice

Like charges will

• Atttract to each other

• repel from each other

• do nothing

Multiple Choice

What is the definition of an electric circuit?

• A incomplete, broken path through which electric charges can flow

• A place for neutrons to flow through wires

• A complete, unbroken path through which electric charges can flow

Multiple Choice

Opposite charges will

• Repel from each other

• Attract to each other

• do nothing

Multiple Choice

If resistance increases then the current will _______________.

• decrease

• increase

• stay the same

Multiple Choice

Some appliances or devices require different numbers of batteries because they have different amounts of resistance.

• True

• False

Multiple Choice

What is the definition of a conductor?

• Materials through which charge can flow easily

• Materials through which charges cannot flow easily

Multiple Select

Series circuits

• 1 pathway

• multiple pathways

• when one bulb goes out they all go out

Multiple Choice

How can you determine the overall static charge on objects?

• Count the number of positive and negative charges, whichever one has the least that is the overall charge.

• Count the number of positive and negative charges, whichever one has more that is the overall charge.

Fill in the Blank

Parallel circuits have

Multiple Choice

What is an example of an insulator?

• Rubber

• Copper

• Silver

• Gold

Multiple Choice

Parallel circuits allow one appliance to be off while others are on.

• False

• True

Multiple Choice

What is the definition of a parallel circuit?

• An electric circuit in which different parts of the circuit are on one complete branche

• An electric circuit in which different parts of the circuit are on separate branches

Multiple Choice

When more light bulbs are added to a ______ circuit, the current slows down.

• series

• Parallel

• gym

Multiple Choice

What is the equation to calculate power?

• Power = Voltage x Current

• Power = Voltage / Current

• Power = Voltage - Current

• Power = Voltage + Current

Multiple Choice

I can add light bulbs to this circuit and it will not change the brightness of the bulbs.

• Series

• Parallel

Multiple Choice

What happens to the rest of the light builds if one goes out on a parallel circuit?

• The other bulbs would be unaffected; they would remain light.

• The other bulbs would be affected; they would not work.

Multiple Choice

When voltage increases, current __________

• decreases

• increases

• stays the same

Multiple Choice

What is the unit of measurement for electric current?

• Volts

• kWh

• Watt

• Amperes

Multiple Choice

When resistance increases, current...........

• increases

• decreases

• stays the same

Multiple Choice

What is the definition of a series circuit?

• An electric circuit in which all parts are connected on after another along one path

• An electric circuit in which all parts are connected on where each bulb has it's own path

Multiple Choice

Voltage and current have a _______ relationship.

• Inverse

• Direct

Multiple Choice

Like electric charges __________ each other.

• attract

• repel

Multiple Choice

Resistance and current have a ________ relationship.

• Inverse

• Direct

Multiple Choice

What happens to the rest of the light builds if one goes out on a series circuit?

• The other light bulbs would also go out.

• The other light bulbs would remain lit.

Multiple Choice

Two flashlights require different amounts of 1.5 V batteries, one needs two and the other needs 3. Which flashlight must have more RESISTANCE?

• Flashlight that requires 2 batteries

• Flashlight that requires 3 batteries

Multiple Choice

The strength of the electric field of a charged particle becomes greater as the distance from the particle _______________.

• increases

• decreases

• stays the same

Multiple Choice

What breaks the circuit by melting if it becomes too hot?

• Fuse

• Circuit breaker

• Ground Wire

• Third Prong

Multiple Choice

The law of ________________________ states the charges are not created or destroyed.

• converted charges

• charge

• conservation of charge

Multiple Select

What are the basic features of an electric circuit? (Select 3)

• Devices that run on electrical energy

• sources of electrical energy

• conducting wire

• a place to hold the device that runs on electrical energy

Multiple Choice

The resistance of a parallel circuit __________________ as you add more branches.

• decreases

• increases

• stays the same

Multiple Select

Describe the static discharge that occurs when you walk across the carpet and touch a metal doorknob. (Select all that apply)

• When your socks rub on the carpet, electrons move the carpet to the socks. This causes an overall negative charge on the socks.

• The charges move your socks to the rest of your body.

• Then the electrons in your fingertips produce an electric field that repels the electrons on the doorknob.

• The electrons on the doorknob move away from the finger. One end of the doorknob becomes positively charged.

Multiple Choice

The continuous flow of charges through a material is called ____________________.

• voltage

• electric surface

• electric current

• amperes

Multiple Choice

• Series circuit
• Incomplete circuit
• Parallel circuit
• Power source

Multiple Choice

During a lab a balloon was rubbed with a wooly fabric. This is an example of which type of charging?

• conduction

• friction

• induction

Multiple Choice

• Power source
• Closed circuit
• Insulator
• Open circuit

Multiple Choice

What types of charges attract?

• Positive and Positive
• Positive and Neutral
• Negative and Neutral
• Positive and Negative

Multiple Choice

• Parallel circuit
• Series circuit
• Incomplete circuit
• Switch

Multiple Choice

What happens when you touch a metal doorknob after rubbing your shoes on the carpet?

• The doorknob sends a burst of electric current into your body

• Millions of electrons go from your finger into the doorknob

• The doorknob sends millions of electrons into your finger

• Your finger becomes negatively charged

Multiple Choice

Glass does not allow electricity to flow through it, so glass is a (n) ________________.

• conductor

• insulator

Multiple Choice

Which of the following is caused by static electricity?

• a stove getting hot when it is turned on
• a magnet being attracted to a refrigerator
• a lightning strike during a storm
• a light bulb coming on when a switch is turned on

Multiple Choice

Copper allows electricity to flow through it, therefore it is a ______________________.

• conductor

• insulator

Multiple Choice

An object that is neutral contains the same number of electrons and protons.

• True

• False

Multiple Choice

In order for electricity to flow, the circuit needs to be ________________.

• open

• closed

• simple

• parallel