Magnetism and Electricity

Multiple Choice

Opposite charges

• attract

• repel

• become neutral

• do nothing

Multiple Choice

Mr. Anady rubbed two balloons against his wool sweater for 30 seconds each. What will happen when the balloons are brought near each other?

• The balloons will repel each other.

• The balloons will attract each other.

• The balloons will become positively (+) charged.

• The balloons will pop.

Multiple Choice

The accumulation of excess electric charge on an object is called

• Static electricity

• Electric discharge

• Resistance

• Current electricity

Multiple Choice

What charge does a proton have?

• negative (-)
• positive (+)
• neutral or no charge (0)

Multiple Choice

What charge does an electron have?

• negative (-)
• positive (+)
• neutral or no charge (0)

Multiple Choice

If a substance has a higher number of electrons than protons on its surface, what type of charge does it have?

• A positive charge.
• A negative charge.
• A neutral charge
• No charge at all

Multiple Choice

What is the major difference between static electricity and current electricity?

• Current electricity involves a continuous flow of neutrons; static electricity is a sudden transfer of protons
• Current electricity can be deadly; static electricity is almost always safe
• In current electricity, there's a single transfer of electrons; in static electricity, there's a steady flow of electrons
• Current electricity involves a flow of electrons; static electricity involves a single transfer of electrons

Multiple Choice

What can happen 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

• Our negatively charged body becomes positively charged

• Our finger becomes negatively charged

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

How Does Charge Build Up?

• Most atoms are uncharged, or neutral because the protons equal the electrons.

• Uncharged objects become charged by gaining or losing electrons

• Static electricity is the buildup of charges on an object

• In static electricity, charges build up on an object, but they do not flow in a current

Charging Objects

• Charges are neither created nor destroyed. This is known as the law of conservation of charge.

• If one object loses electrons, another object must pick them up

• There are four methods by which charges can redistribute themselves: Friction, conduction, induction, polarization

• 
  

Charging by Friction

• Charging by friction is the transfer of electrons from one uncharged object to another by rubbing objects together

• 
  

• 
  

Multiple Choice

True or False:
In static electricity, charges build up on an object, but they do not flow continuously.

• True
• False
• 11
• Tuesday

Multiple Choice

Rubbing a balloon on hair is an example of static charge build up created by....

• conduction
• friction
• induction
• hairduction

Multiple Choice

The girl's hair and the comb are attracting  one another.  The hair and the comb have

• opposite charges
• like charges

Multiple Choice

If an object has the same number of positive and negative charges, its electrical charge is...

• positive
• negative
• neutral or no charge
• opposite

Multiple Choice

An object becomes postiively charged when which of the following occurs?

• loses electrons
• gains electrons
• loses protons
• gains neutrons

Multiple Choice

What is static electricity caused by?

• A balance of power

• A balance of positive and negative charges

• An imbalance of positive and negative charges

• An imbalance of protons and neutrons

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

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
• our finger becomes negatively charged

Multiple Choice

The center of an atom is known as the

• nucleus

• electron cloud

• neutron cloud

• mass circle

Multiple Choice

Protons have this type of charge

• positive
• negative
• neutral - no charge

Multiple Choice

A particle that orbits around the nucleus is a(n)...

• Proton
• Neutron
• Electron
• Quark

Multiple Choice

All matter is made of what?

• energy 
• atoms 
• volume
• compounds 

Multiple Choice

Electrons have this type of charge

• positive
• negative
• neutral - no charge

Multiple Choice

Which letter represents a proton?

• A
• B
• C
• D

Multiple Choice

Which letter represents a neutron?

• A
• B
• C
• D

Multiple Choice

Which letter represents an electron?

• A
• B
• C
• D

Multiple Choice

A material that allows energy to flow through easily

• Conductor

• Insulator

Multiple Choice

A material that does not allow energy to flow through easily

• Conductor

• Insulator

Multiple Choice

Which of the following is a conductor?

• Paper straw

• Aluminum can

• Log

Multiple Choice

Which of the following is an insulator?

• Glass

• Copper

• Human body

Multiple Choice

Water is an insulator.

• True

• False

Multiple Choice

The human body is a conductor.

• True

• False

Multiple Choice

Rubber

• Conductor

• Insulator

Multiple Choice

Metal pan

• Conductor

• Insulator

Multiple Choice

The transfer of heat always goes from hot to cold.

• True

• False

Multiple Choice

Your coat is an insulator.

• True

• False

Multiple Choice

• Conductor

• Insulator

Multiple Choice

• Conductor

• Insulator

Multiple Choice

• Conductor

• Insulator

Multiple Choice

• Conductor

• Insulator

Multiple Choice

• Conductor

• Insulator

Multiple Choice

What supplies energy in an electric

circuit?

• conductor

• light bulb

• battery

Multiple Choice

Which material is a conductor?

• plastic

• silver

• glass

Multiple Choice

Which switch or switches must be closed to make the lamps light?

• only switch 1

• only switch 2

• switches 1 and 2

Multiple Choice

Is this an open circuit or a closed circuit?

• open

• closed

Multiple Choice

In a complete circuit, the wire is the_____________.

• load

• conductor

• power source

Multiple Choice

Is this an open circuit or closed circuit?

• open

• closed

Multiple Choice

In the diagram below, describe the energy transformations that occur in the circuit, starting with the battery, when the light is on.

• Chemical to Electric to Light

• Chemical to Mechanical to Light

• Electrical to Chemical to Light

• Light to Chemical to Electrical

Multiple Choice

What is a wet cell battery?

• one that uses water to make electricity

• one that uses a liquid electrolyte solution

• one that uses a powdered electrolyte solution

Multiple Choice

What is a dry cell battery

• one that uses water to make electricity

• one that uses a liquid electrolyte solution

• one that uses a paste electrolyte

Multiple Choice

What is a storage cell?

• a one-use source of electrical energy

• a re-chargeable source of electrical energy

• a one-use source of solar electricity

Multiple Choice

what is an electric cell?

• a device that converts mechanical energy into electrical energy

• a device that turns stored chemical energy into electrical energy

• a device that devours electrical energy

• a device that converts static electricity into mechanical energy

Multiple Choice

Conventionally, current is described as flowing from the ................ terminal of a battery to the ................ terminal.

• Negative.....negative

• Negative....positive

• Positive......negative

• Positive....positive

Multiple Choice

In the circuit, the bulb lights up because there is ............... flowing in the closed circuit.

• battery

• current

• resistance

• voltage

Multiple Choice

What is the unit of Resistance?

• Ohm, Ω

• Amp, A

• Volt, V

• Joule, J

Multiple Choice

What is the unit of Potential Difference?

• Ohm, Ω

• Amp, A

• Volt, V

• Joule, J

Multiple Choice

Potential energy can be converted into _________________.

• food & waste
• water & light
• light & heat
• heat & food

Multiple Choice

A circuit with only one path for the current to flow is a __________________.

• parallel circuit
• series circuit
• mini circuit
• device

Multiple Choice

Resistance in a circuit is equal to voltage divided by ____________.

• joules
• current
• power 
• amperage

Multiple Choice

Circuits often include a _____________ to control the flow of current.

• switch
• conductor
• voltage
• current

Multiple Choice

_________________ found that current, voltage, and resistance are always related.

• Isaac Newton
• Albert Einstein
• Georg Ohm

Multiple Choice

What kind of circuit is this?

• series
• parallel

Multiple Choice

this circuit is .....?

• open
• parallel
• closed
• The cutest little circuit evah!

Multiple Choice

When all parts of the circuit are connected it is a ______ circuit. 

• open
• closed

Multiple Choice

The picture shows an electrical circuit. This circuit is a series circuit because: 

• It has 3 light bulbs.
• The same current flows through all three light bulbs.
• It uses a single battery.
• The electrical current has more than one path to flow through

Multiple Choice

What is the unit for resistance?

• volts

• amps

• coulombs

• ohms

Multiple Choice

Simple, Series, or Parallel?

• Simple

• Series Circuit

• Parallel Circuit

Multiple Choice

What is a Parallel circuit? 

• Has only one path 
• Has more than one path 
• Allows energy to travel through easily 

Multiple Choice

This circuit has a 24 volt battery and the resistor is 8 ohms. How many amps are running through the circuit?

• 3 Amps
• 192 Amps
• 2 Amps
• 4 Amps

Multiple Choice

What is the name of this component?

• battery

• cell

• open switch

• lamp

Multiple Choice

What is the name of this component?

• closed switch

• cell

• open switch

• wire

Multiple Choice

What is the name of this component?

• fuse

• cell

• bell

• lamp

Multiple Choice

What is the name of this component?

• fuse

• cell

• wire

• bell

Multiple Choice

Is this an example of a series circuit?

• yes

• no

• It is a parallel circuit

Multiple Choice

An electric current is the flow of ..............in a circuit?

• Protons

• Electrons

• Maltesers

• bulbs

Multiple Choice

What type of circuit is shown in the picture?

• open

• parallel

• series

• double

Multiple Choice

Why type of circuit is shown in the picture below?

• megnetic

• open

• parallel

• closed

Multiple Choice

what type of circuit is shown in the picture below?

• magnetic

• double

• parallel

• series

Multiple Choice

What type of material allows current to easily pass?

• magnets

• inductors

• conductors

• insulators

Multiple Choice

How could you make the bulb brighter in this circuit?

• adding another light bulb

• removing the switch

• adding another battery in series

• adding another battery in parallel

Multiple Choice

What kind of circuit is this?

• series
• parallel

Multiple Choice

Does this diagram represent a series or parallel circuit?

• series circuit
• parallel circuit

Multiple Choice

What will happen if one light bulb is removed from this circuit?

• The other bulbs will go out.
• The other bulbs will stay on
• The other bulbs will get dimmer.
• The battery will become stronger.

Multiple Choice

The picture shows an electrical circuit. This circuit is a series circuit because: 

• It has 3 light bulbs.
• The same current flows through all three light bulbs.
• It uses a single battery.
• The electrical current is divided between the three light bulbs.

Multiple Choice

Pick the correct sentence.

• This circuit will work because it is a closed circuit.
• Energy will freely flow in this circuit.
• This circuit will not work because there is no energy source.
• This circuit will not work because there is no switch.

Multiple Choice

Which of the following is the most appropriate definition for magnetism?

• the force of attraction or repulsion of magnetic materials

• the force of attraction only of magnetic materials

• the force of repulsion only of magnetic materials

• none of the above

Multiple Choice

Which of the following is the most appropriate definition for magnetic field?

• an area surrounding a magnet that does not apply a force (a push or pull)

• an area directly on the magnet that applies a force (a push or pull) without actually touching an object

• an area of magnetism surrounding a magnet that applies a force (a push or pull) without actually touching an object

• an area surrounding a magnet that applies a force (a push or pull), but only by directly touching an object

Multiple Choice

If placed in a magnetic field, which of the following materials would be affected?

• a compass

• wood chips

• plastic paper clips

• pieces of glass

Multiple Choice

How does the electromagnet in the diagram above demonstrate the relationship between magnetism and electricity?

• The wire is wrapped around the iron core, but no electric circuit is present.

• The wire is wrapped around the iron core, but no energy source is present.

• The wire in the electric circuit is wrapped around an iron core producing a magnetic field.

• No circuit is present.

Multiple Choice

Which of the following is flowing through the electromagnet above?

• electric current

• magnetic current

• magnetic energy

• chemical energy

Multiple Choice

Like poles of a magnet do what?

• repel
• attract 
• nothing 

Multiple Choice

What device makes a fan plugged into the wall spin?

• generator
• battery
• electromagnet
• electric motor

Multiple Choice

What is a wire in a circuit wrapped around an iron core called?

• electromagnet
• generator
• electric motor

Multiple Choice

Unlike poles of a magnet do what?

• repel
• attract
• nothing 

Multiple Choice

What energy transformation takes place in a battery powered fan that is spinning?

• kinetic to chemical to electrical
• chemical to kinetic
• chemical to electrical to kinetic
• electrical to kinetic to chemical

Multiple Choice

What is the force of attraction or repulsion of magnetic materials?

• electricity
• magnetism 
• energy
• electromagnetism 

Multiple Choice

Arrows are close together on a force field when the force is

• stronger

• weaker

• opposite

Multiple Choice

Electronic devices create magnetic fields because they

• are magnets

• are compasses

• have moving particles with electric charge

Multiple Choice

The electromagnetic forces from a current carrying wire are strong enough to move the compass needle. The forces can be made stronger by

• making the wire shorter

• making the wire longer

• making the wire into loops

Multiple Choice

The type of current where charges flow in one direction

• Direct Current
• Alternating Current
• Electron Flow
• Voltage

Multiple Choice

The type of current where charges shake back and forth in a circuit

• Alternating Current
• Direct Current
• Voltage 
• Switchback Current

Multiple Choice

AC stands for ___.

• Alternating Current
• Attraction Connections

Multiple Choice

DC stands for ____ and is used in batteries.

• Distant Current
• Don't Current
• Direct Current

Multiple Choice

what is this symbol for?

• light bulb
• switch
• battery
• resistor

Multiple Choice

Current that reverses direction in a regular pattern is called ____. 

• direct current 
• circuit current
• magnetic current
• alternating current 

Multiple Choice

Current that does NOT reverse direction is called ____. 

• magnetic current
• direct current
• circuit current
• alternating current

Multiple Choice

What is electric current?

• The flow of electrons
• The flow of protons
• The flow of neutrons
• The flow of atoms

Multiple Choice

What is the unit of measurement for resistance?

• Voltage

• Ampere

• Watts

• Ohms

Multiple Choice

Static electricity is:

• electricity flowing in a wire
• the buildup of electric charges on an object
• when protons move between objects

Multiple Choice

Two objects with LIKE static charges will

• attract each other
• even out in the end
• repel each other
• cause a spark