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Worksheetsmagnetic field
Total questions: 20
Worksheet time: 3600secs
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 area of magnetic force around a magnet is known as its _____________.
magnetic field
magnetic declination
magnetic fan lines
magnetic tan lines
Looking at the field lines in this picture, these two magnets are ________
Attracting
Repelling
Attracting and Repelling
Doing nothing
1) A wire carries a current, creating a magnetic field around itself as shown. The current in the wire is:
A. Directed to the right
A. Directed to the left
A. Equal to the magnetic field
In the same direction as the magnetic field
1) There are four coils of wire being used as electromagnets. They all have the same size and are made up of the same material but have a different number of loops. Which coil will produce a magnetic field with the maximum strength when the same amount of current passes through all coils?
a coil having 25 loops
a coil having 30 loops
a coil having 45 loops
a coil having 50 loops
1) A straight wire carries a current inside the paper. What is the direction of the magnetic field at point P?
Points to the right
Points to the left
Points to the top of the page
Points to the bottom of the page
1) A bar magnet is at rest, next to a fixed electromagnet. In which direction will the bar magnet move when switch S is closed?
to the left
to the right
up the page
down the page
1) Two long, parallel wires each carry the same current I in the same direction. Is the total magnetic field at the point midway between the wires:
Zero
Directed into the page
Directed out of the page
Directed to the left
1) Which of the following actions would double the magnitude of the magnetic force per unit length between two parallel current-carrying wires? Choose all correct answers.
Double one of the currents.
Double the distance between them.
Double both currents.
None of the above
force on a conductor carrying a current = 1.32 N, current = 4 A, length = 3.88 m, magnetic flux density = ?
0.0851
1.17
0.317
0.106
magnetic flux density = 0.45 T, current = 1.37 A, length = 1.9 m, force on a conductor carrying a current = ?
0.0851
1.17
0.317
0.106
force on a conductor carrying a current = 5.37 N, magnetic flux density = 3.91 T, current = 4.33 A, length = ?
0.0851
1.17
0.317
0.106
The SI unit of magnetic field is
Weber, Wb
Gauss, G
Tesla, T
Farad, F
