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WorksheetsElectromagnetism Check Point Quiz
Total questions: 25
Worksheet time: 6hrs 1mins
What is a device that transforms electrical energy into mechanical energy?
Motor
Generator
Magnet
Transformer
Electric current is passing through a wire. Under which circumstances below will a magnetic field be created around the wire?
Only when the wire is absolutely straight.
Only when the wire makes a complete loop
Only when the current comes from a battery.
A magnetic field is always created around a wire when it carries electric current.
A speaker contains a magnet and a solenoid. Which of the following best describes what happens in the speaker when it produces sound?
The magnet causes the electric current to alternate direction causing the solenoid to vibrate.
Moving electric charges in the solenoid create a magnetic field that interacts with the magnet causing it to vibrate.
The solenoid generates electricity by pushing against the magnet.
The field of the magnet increases voltage in the solenoid.
What will happen if the north pole of one magnet is brought near the south pole of another magnet?
The poles will repel each other.
The poles will attract each other.
Nothing will happen. The poles will not interact.
The poles will attract each other at first and then repel each other.
How do most scientists believe the Earth's magnetic field is produced?
Santa
The motion of neutrons in the outer core of the Earth.
The motion of electrons in the outer core of the Earth
The motion of protons in the outer core of the Earth.
What produces ALL magnetic fields?
Moving charged particles.
Moving particles.
Charged particles at rest.
Moving particles of Earth.
Which conversion process is the basic function of an electric generator?
Converts low voltage electricity to high voltage electricity.
Converts mechanical energy to electrical energy.
Converts direct current (DC) to alternating current (AC).
Converts electrical energy to mechanical energy.
How could you detect a magnetic field around a bar magnet?
By using a battery.
By using a compass.
By using paper.
By using your hand.
A compass is brought near a magnet. Which pole of the compass needle will be attracted to the north pole of the magnet?
North Pole
South Pole
Neither pole, it will spin
The needle will bend so both poles are attracted to the magnet.
Which diagram below best represents the magnetic field around a current carrying wire. The arrow represents the direction of the current.
Which diagram below best represents the direction of the magnetic field around a bar magnet?
The diagram on the left shows the magnetic field lines between two magnetic poles, A & B.
Which statement below describes the polarity of magnetic poles A & B?
A is the north pole and B is a south pole.
A is a south pole and B is a north pole.
Both A & B are north poles.
Both A & B are south poles.
When you bring a compass near a current carrying wire, what will happen?
The needle will deflect.
The current will stop.
The wire will catch fire.
The needle will do nothing.
An electric charge is moving through a wire on the Earth. Along with an electric field, what other field(s) is present near the moving charge?
A magnetic field only.
A gravitational field only.
Both a gravitational field and a magnetic field.
There is no other field present near the charge.
A solenoid is connected to an ammeter (galvanometer) as shown to the left. Which method below would be the best way to produce electric current in the wire with a magnet?
Place a magnet at the end of the wire and pull the charge through.
Rub the wire with a magnet to drag the charge through the wire.
Move the magnet in and out of the solenoid.
Move the magnet around the outside of the solenoid.
A solenoid is connected to an ammeter (galvanometer) as shown to the left. If you increased the strength of the magnet used to produce the current in the wire, what should happen to the amount of current produced?
It should decrease.
It should increase.
It should stay constant.
If you start with the north pole it will increase, but if you start with the south pole it will decrease.
A solenoid is connected to an ammeter (galvanometer) as shown to the left. If you increase the number of loops in the solenoid, but keep its length the same, what should happen to the amount of current produced?
It should decrease.
It should increase.
It should stay constant.
If you start with the north pole it will increase, but if you start with the south pole it will decrease.
A solenoid is connected to an ammeter (galvanometer) as shown to the left. If current is allowed to pass through the wire, which statement below would be true about the magnetic field produced?
A strong magnetic field will be produced inside the solenoid along its axis.
A strong magnetic field will be produced around the outside of the solenoid.
Nothing because there is already current in the wire.
A strong magnetic field will be produced at the north pole, but only a weak magnetic field will be produced at the south pole.
A solenoid is connected to an ammeter (galvanometer) as shown to the left. If you decrease the current passing through the wire, what should happen to the magnetic field produced?
It should decrease.
It should increase.
It should stay constant.
At the north pole it will increase, but at the south pole it will decrease.
A solenoid is connected to an ammeter (galvanometer) as shown to the left. How would the speed you move the magnet affect the current produced in the wire?
The current would not be affected.
The faster you move the magnet the less the current will be.
The faster you move the magnet, the greater the current will be.
The faster you move the magnet the stronger the current will be in front of the magnet, but the less it will be behind the magnet.
Two bar magnets are placed near each other as shown to the left.
Which statement below best describes the forces between the bar magnets?
Both the gravitational force and the magnetic force between them are repulsive.
Both the gravitational force and magnetic force between them are attractive.
The gravitational force between them is repulsive while the magnetic force between them is attractive.
The gravitational force between them is attractive while the magnetic force between them is repulsive.
Two bar magnets are placed near each other as shown to the left.
What will happen to the magnetic force between the two magnets if they are pushed closer together?
The force would be weaker.
The force would be stronger.
The force would remain unchanged.
The force would reverse the poles.
You have wrapped a wire around an iron nail. What should you do to make the electromagnet you have made attract a steel paperclip?
Connect the wires to a light bulb.
Heat the wire.
Send current through the wire.
Touch the ends of the wire together.
Which object would most likely be attracted to a magnet?
A bar of silver.
A copper penny.
An aluminum paperclip.
An iron rod.
At the atomic level what causes magnetism?
The movement of electrons around the nucleus of an atom.
Both the movement of electrons around the nucleus of an atom and the spinning of electrons.
The spinning of electrons.
Very small magnetic gnomes.
