WorksheetsElectromagnetic Force
Total questions: 42
Worksheet time: 44mins
A proton (positive charge) and electron (negative charge) are attracted to one another. This is due to...
Gravitational fields
Electrical fields
Magnetic fields
Track and field
The electrical wires in many homes are made of copper and covered with plastic. Why are copper and plastic good choices for electrical wires?
Copper is a conductor of electricity, and plastic is an insulator of electricity.
Copper is an insulator of electricity, and plastic is a conductor of electricity.
Copper is a conductor of electricity, and plastic is an insulator of heat.
Copper is an insulator of electricity, and plastic is a conductor of heat.
The greater the distance between magnets, the _________ the force between them.
greater
weaker
The area of magnetic force around a magnet is known as its _____________.
magnetic field
magnetic declination
magnetic fan lines
magnetic tan lines
Why did the compass needle change position when the circuit was closed?
Electricity also runs through the compass.
A magnetic field surrounds a current-carrying wire
The compass-needle change indicates the potential energy
The magnetic poles of the D-cell reversed
A circuit is....
a pathway for the flow of magnetism
a pathway for the flow of electricity
An electromagnet is...
Metal that becomes a permanent magnet with electricity
Metal that becomes a temporary magnet with electricity
Which component becomes a temporary magnet?
A - switch
E - core
C - wire
F - battery
Which component controls the flow of electricity by opening and closing the circuit?
A - switch
E - core
C - wire
F- battery
Will the bulb light?
Yes
No
Will the bulb light?
Yes
No
Electricity flows through the wire wrapped around the core
True
False
Electricity flows through the switch when it is closed.
True
False
A permanent magnet can _____________ magnetism in some metal objects (like a paper clip)
create
share
induce
destroy
An electric current can induce magnetism
True
False
A moving magnet can induce an electric current
True
False
electrons flow from _____ areas to _____ areas.
positive; negative
negative; positive
neutral; negative
neutral; positive
A material through which electrons do NOT flow easily is a(n) ______.
insulator
conductor
fuse
circuit breaker
The subatomic particle with a negative charge is the...
proton
neutron
electron
nucleus
The subatomic particle with a positive charge is the...
proton
neutron
electron
nucleus
The subatomic particle with no charge is the...
proton
neutron
electron
nucleus
A single unit of an element is a...
electron
quark
atom
proton
What subatomic particle orbits around the nucleus?
Leptons
Protons
Neutrons
Electrons
What two subatomic particles make up the nucleus of an atom?
Electrons and Mesons
Protons and Neutrons
Quarks and Leptons
Electrons and Protons
The section labeled D is known as the?
proton
Neutron
Nucleus
Electron
This picture shows the direction of unpaired electrons in a material (grouped into domains). This substance is _____________ .
magnetizecd
unmagnetized
positively charged
negatively charged
Domains are groups of atoms that are organized the same way.
You know this substance is magnetized because
all the domains are different sizes
the arrows are drawn in red, red means lots of south poles
the domains are aligned (all the unpaired electrons are pointing the same way)
the domains are random
What will the magnets in the picture do?
Attract each other
Repel each other
Both attract and repel
Neither attract nor repel
What will the magnets in the picture do?
Attract
Repel
Neither attract nor repel
Both attract and repel
A material through which electrons flow easily is a(n) ______.
insulator
conductor
fuse
power source
Which are the characterictics of a LED light bulb?
Are the most energy efficient of all bulbs.
uses a filament that glows when connected to a circuit
Contain Mercury gas that glows when connected to a circuit
Contains light emitting diodes
Which characterictics would describe an incandenscent light bulb?
very energy efficient
made with diodes
contains a filament
most of the energy is transferred to heat
What do electricity and magnetism have in common?
Both involve charged particles
Both have fields (non-contact force)
both are part of Electromagnetic Force
Both have a north and south
What causes magnetism
unpaired electrons that can point the same way
liquid metal
magic
paired electrons that point opposite directions
How does a battery cause current to run through a circuit?
A flow of electrons through a conductor is called:
conductivity
spark
circuit
current
Why does a battery have potential energy?
It has a separation of charges (+ end and - end)
It has compressed current
It has an internal closed circuit that can be expanded to wires
It has all it's electrons removed, so it quickly pulls electrons from a wire
