WorksheetsMagnetic Fields
Total questions: 10
Worksheet time: 9mins
Are the magnetic field lines in the picture correct?
Yes, because they point from north to south.
No, because they point from north to south (they're supposed to go the other way).
Yes, because the North pole is on the left in all pictures.
No, because the North pole is on the left in all pictures (it's supposed to be on the right).
The strongest part of a magnet is...
the bars .
the force field.
the poles.
the middle.
The area of magnetic force around a magnet is known as its _____________.
magnetic field
magnetic declination
magnetic fan lines
magnetic tan lines
A ________ is a device that has a magnet on a needle that spins freely. It is used for navigation because its needle usually points north.
calculator
ruler
compass
map
Looking at the field lines in this picture, these two magnets are ________
Attracting
Repelling
Attracting and Repelling
Doing nothing
A wire carries a current, creating a magnetic field around itself as shown. The current in the wire is:
Directed to the right
Directed to the left
Equal to the magnetic field
In the same direction as the magnetic field
How could you increase the strength of a magnetic field in a coil?
use an iron core, decrease the number of turns of wire
increase the voltage and decrease the number of turns
use an iron core and increase the size of the current
increase the number of turns and decrease the current
A magnetic field is the field of magnetic lines of force produced by current-carrying conductors or permanent magnets. Which statement about magnetic lines of force is not true?
The magnetic lines of force always emanate from the North pole along a curved path outside the magnet to the South pole.
The direction of magnetic lines of force inside the magnet is from North pole to South pole.
The magnetic lines of force outside the magnet do not intersect with each other.
The magnetic lines of force in a uniform magnetic field are parallel and equidistant.
Which of the following will not influence the magnetic force acting on a current-carrying conductor?
The current flowing in the conductor
Length of the conductor
Magnetic field strength
The speed of the conductor
