WorksheetsMagnetism and Motors
Total questions: 10
Worksheet time: 10mins
For a step up transformer to operate properly, the current in the coil of wire must do what?
The current must continually flow in the same direction to keep the polarity of the magnets constant.
The current must continually switch directions to flip the polarity of the coils.
The current must continually increase its resistance.
The current must continually decrease its voltage.
The current must continually switch from electrons to protons to keep voltage and the resistance the same.
Where are the magnetic fields the strongest?
Near the magnetic domain
Close to the right side of the magnet
Near the poles of the magnet
Near the middle of the magnet
Near the dipoles
What will the north poles of two magnets do when they are brought close to each other?
Multiple the force between the two poles
Repel each other
Attract each other
Have very little effect on each other
Cancel each other out
Around a wire carrying current, what shape will the magnetic field be surrounding the wire?
A back and forth pattern around the wire
A random pattern
A crooked line along the wire
An octagon around the wire
A circle around the wire
Besides an iron core, what are the other two things that Josh needs to make an electromagnet?
a magnet and a voltage source
loops of wire and a voltage source
loops of cotton and a transformer
magnet and a resistor
loops of wire and a resistor
If Dr. Walker carries a compass from the northern hemisphere across the equator to the southern hemisphere, what will the compass' magnetic needle do?
The needle will continue pointing towards the magnetic south pole
The needle will start pointing the opposite direction it was
The needle will begin to slowly rotate until it is facing the opposite way it was pointing
The needle will continue pointing towards the geographic south pole
The needle will begin pointing perpendicular to the poles
What is the source of all magnetism?
Current not moving
Electrons moving in and out of the atom rapidly
Electrons moving in the same direction
Electric charges going at the same speed
Northern forces moving in the same direction
Which of the following will make a magnetic field?
A signal from your key fob to unlock the doors on your car.
A piece of gold when the gold is on the floor.
An electric cord to the radio when the radio is un plugged.
An electric cord to the charger for your phone when the charger for your phone is on.
An electric cord to the refrigerator when the refrigerator is off.
When Alivia dangles 9 staples from the south pole of a magnet, what will be the top of the last staple?
It will be a north pole
It will be a dipole
It will be a magnetic field
It will be a south pole
It will be a magnetic domain
Which of the following is used to reduce the voltage of the electricity coming into your home from the power lines?
Electric motor
Generator
Step-down transformer
Light bulb
Step-up transformer
