WorksheetsElectromagnets
Total questions: 10
Worksheet time: 7mins
When _______________ travels through a
conductor, a magnetic field is created
current
a magnetic field
neutrons
Electric currents produce _____________
electron clouds
magnetic fields
sound waves
In magnets and electromagnets, similar poles attract
true
false
In magnets and electromagnets, dissimilar (opposite) poles attract
true
false
The object inside a radio that makes a speaker work is called a(n) ______________________
electromagnet
permanent magnet
electron cloud
In a battery, electrons collect at the __________________ end of the battery.
positive
middle
negative
Electrons which collect at the negative end of the battery, can flow to the positive end through a ___________________
wire
electron cloud
magnet
When the strength of the magnetic field changes, the ________________________between the coil and the permanent magnet changes.
attractive force
polarity
wire
A magnet is defined as
the force between two opposite poles
any material that has a magnetic field
the electron cloud surrounding an object
How can the strength of an electromagnet be increased? (mark all that apply)
increase the current flowing through the coil
increase the number of coils
add an amplifier to it
put iron core inside the coil
