WorksheetsElectromagnetism
Total questions: 25
Worksheet time: 13mins
Alexandra was preparing to go on a hike in the woods. She gathered the equipment she would need and placed it on the kitchen counter. By chance, she placed her compass near an electrical outlet. Although the compass was not moving, the compass needle turned because ______________.
the electric current in the outlet produced a magnetic field
the compass could only be used outdoors
the kitchen counter was made of a magnetic substance
the kitchen had a microwave oven
According to the diagram, which pair could both be north poles?
A and B
B and C
A and C
C and D
The ______ are regions where the magnetic force exerted by a magnet is strongest.
magnetic field lines
anodes
magnetic poles
cathodes
This structure produces power for use in the home by converting
chemical energy into mechanical energy.
electrical energy into mechanical energy.
chemical energy into electrical energy.
mechanical energy into electrical energy.
The diagram shows an electric motor and a generator. Which two areas of physical science are closely related to the development of these devices?
sound and light
light and magnetism
electricity and sound
electricity and magnetism
Scientists believe that magnetism is caused by the spin of certain atomic particles called
electrons
protons
neutrons
nuclei
Which of the following is found in all magnets?
a geographic pole
a transformer
a north pole and a south pole
an electric field
A magnet will not attract all metal objects. Which material below will a magnet NOT attract?
Iron
Aluminum Foil
Cobalt
Nickel
Which pair of magnets would result from cutting this magnet in half?
A
B
C
D
Which of the following best describes an electromagnet?
permanent magnet
insensitive to electric currents
unchanging magnetic properties
temporary magnet
Hamed wanted to find out how to make an electromagnet stronger. The results of his experiment are listed in the table above. According to these data, which of the following does NOT make an electromagnet stronger?
increasing the number of batteries that are connected
increasing the number of wire turns around the core
increasing the number of nails inside the core
increasing the number of tacks used
A galvanometer is an instrument used to detect small amounts of electric current.The current detected is most likely measured in
milliliters
milligrams
milliamperes
milliseconds
Which of the following devices produces electric current?
generator
stereo speaker
galvanometer
electric motor
The magnetic field that surrounds a magnet exerts _______.
electric current
the magnetic force
air pressure
resistance
North poles of magnets always attract ________.
south poles
other north poles
negative charges
positive charges
The picture shows an experiment used to determine the effect of using more nails in the core of an electromagnet.Which of the following would make this a better-designed experiment?
using a different number of batteries for each electromagnet
using the same number of turns of wire for each electromagnet
inserting an ammeter in each circuit between the battery and the nails
using a different size battery for each electromagnet
Groups of atoms with aligned magnetic poles are called _______.
magnetic domains
magnetic fields
elements
permanent magnets
Electric current passing though a wire produces ________.
a magnetic field around the wire
a permanent magnet
geographic poles
a compass
What effect does increasing the current in the wire have on an electromagnet?
It decreases the strength of the magnetic field.
It increases the strength of the magnetic field.
It has no effect on the electromagnet.
It causes it to become a permanent magnet.
Which of the following changes electrical energy into mechanical energy?
generator
electric motor
transformer
superconductor
In order for the electromagnetic coil in the motor to keep turning, the current must ________.
continue in one direction
periodically increase in strength
change direction
be through an ammeter
The diagram above shows the magnetic field surrounding a bar magnet. The closer together the lines of force, the stronger the magnetic field. According to the diagram,where is the magnetic field strongest?
around the north pole
around the south pole
around both poles
in the center of the magnet
Which of the following is a form of electromagnetic induction?
producing electric current by moving a magnet through a wire loop
using an electromagnet to measure electric current
producing mechanical energy by sending electric current through an electromagnet
changing electrical energy to mechanical energy that produces sound
Sandra is trying to identify an unknown substance. She determines by testing that it has a density of 7.5 g/cm^3 and can be picked up by a magnet. She concludes that the matter is
wood
iron
calcium
plastic
Which of the following devices can increase or decrease the voltage of an alternating current?
generator
transformer
battery
galvanometer
