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WorksheetsElectricity and Magnetism Unit Review (Unit 4)
Total questions: 31
Worksheet time: 16mins
What is static electricity?
Electricity that is stored up on the surface of a charged object.
The flow of electrons through a circuit.
Radio interference.
The transfer of protons.
How does friction build up charges in objects?
Electrons are forced off of the surface of one object and onto another when they are rubbed together.
A charged object repels particles in a neutral object, separating its charges.
Electrons transfer from one object to another by direct contact or a spark.
Protons transfer from one object to another when they are rubbed together.
Rubbing a balloon on your friend's head charges the balloon through ___________
Friction
Conduction
Induction
Getting shocked when you try to pet your cat is an example of ___________
Friction
Conduction
Induction
If you hold a negatively charged pipe near a balloon, the balloon may become charged by ___________
Friction
Conduction
Induction
What is static discharge?
The process through which an object gains an electrical charge
The process of differing charges equalizing
The effect of charged objects attracting each other
The area around a charged object where the effects of the charge can be felt
What happens inside of clouds to produce an electrical charge?
Particles in the cloud collide and build up charges through friction
Clouds become heavy and charge up
Energy from the sun charges the clouds
Thor swings his hammer
What causes charges on the ground to change leading up to a lightning strike?
Negatively charged clouds cause charges in the ground to separate, making the surface positively charged.
The ground is always positively charged
The ground is always negatively charged
Magic
____________ are the negatively charged particles that flow around a circuit.
Electrons
Protons
Neutrons
Positrons
What is current electricity?
Electricity that is stored up on the surface of a charged object.
The flow of electrons through a circuit.
Radio interference.
The transfer of protons.
Which of the following is NOT a necessary part of an electrical circuit?
A power source
A conductor
A resistor/load
A switch
Electricity always flows in which direction?
Negative to positive
Positive to negative
Clockwise
Down
A material that does not allow the flow of electrons is called an ________________
Insulator
Conductor
Transistor
Transformer
A material that allows electrons to flow easily is called a ________________
Insulator
Conductor
Transistor
Transformer
What is a magnetic field?
The area around the magnet where the magnet's forces can affect other objects
The source of magnetism inside a magnet
The space between two magnets
The place where magnets are grown
How can you turn a paperclip into a temporary magnet
Drag one side of a permanent magnet across the paperclip repeatedly in the same direction
Drag one side of a permanent magnet back and forth over the paperclip
Drop the paperclip a lot
Heat up the paperclip
An electromagnet uses ...
An electric current to produce a magnetic field
A magnetic field to produce an electric current
Mechanical energy to produce electrical energy
Electrical energy to produce mechanical energy
Which of these options would increase the strength of an electromagnet?
Using a smaller iron core
Using less voltage
Adding more turns to the coil of wire
Making the electromagnet work out
Which of the following is NOT a required part of an electromagnet?
A conductive coil of wire
A source of electricity
An iron core
A light bulb
A device that steps up/steps down the voltage in a wire is called a ________________
Insulator
Conductor
Transistor
Transformer
A generator uses ...
An electric current to produce a magnetic field
A magnetic field to produce an electric current
Mechanical energy to produce electrical energy
Electrical energy to produce mechanical energy
An electric motor uses ...
An electric current to produce a magnetic field
A magnetic field to produce an electric current
Mechanical energy to produce electrical energy
Electrical energy to produce mechanical energy
If you place a compass near a wire with an electric current, the compass will
Turn to line up with the wire's magnetic field
Start spinning
Do nothing
Turn in the opposite direction
The opposite ends of a magnet are called ...
The North and South Poles
The Positive and Negative Ends
Terminals
Good and Evil
The push or pull that magnets exert on other objects is known as ...
Magnetic force
Resistance
Static discharge
Telekinesis
What happens inside of an object to give it a magnetic field?
The domains in the object become aligned
The atoms become charged
The domains in the object become disorganized
Tiny fairies all push in the same direction
If a bar magnet is cut in half, the pieces become ...
Two smaller magnets, each with a north and south pole
Two smaller magnets, but with only a north or south pole
Demagnetized
Insulators
Heating, hammering, or dropping a magnet might cause ...
The magnet to lose its magnetic field
The magnet to get stronger
An electric current
The end of the world
The north end of a compass always points to Earth's ...
Magnetic South Pole, which is the Geographic North Pole
Magnetic North Pole, which is the Geographic South Pole
Magnetic and Geographic North Pole
Magnetic and Geographic South Pole
Which type of charges will attract each other?
Opposite charges
Like charges
Similar charges
Disorganized charges
Forces of attraction/repulsion between two charged objects are stronger when the objects are ...
Closer together
Further apart
Made of the same material
Conductors
