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WorksheetsMagnetic Fields
Total questions: 25
Worksheet time: 17mins
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
The strongest part of a magnet is...
the bars .
the force field.
the poles.
the middle.
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 SI unit of magnetic field is
weber
gauss
tesla
farad
⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙
⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙
⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙
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) The magnetic field inside the coil shown below is directed:
Into the page
Out the Page
To the left
Towards the bottom of the page
1) Two long parallel wires 40 cm apart are carrying currents of 10 A and 20 A in the opposite direction. What is the magnitude of the magnetic field halfway between the wires?
1.0 x 10^-5 T
2.0 x 10^-5 T
3.0 x 10^-5 T
4.0 x 10^-5 T
1) A superconducting wire carries a current of 10^4 A. Find the magnetic field at a distance of 1.0 m from the wire.
2 x 10^-3 T
8 x 10^-3 T
1.6 x 10^-2 T
3.2 x 10^-2 T
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 3.25 A current is moving through a loop with 5 turns. What is the radius of the loop that produces a magnetic field of 3.4 x 10^-4 T at its center?
0.03 m
0.25 m
0.50 m
0.75 m
Two parallel wires of length 2 m are separated by 40 cm. If the magnetic force between the two wires is 2 ×10^-6 N and the current in the second wire is twice the current in the first one.
1) Which of the following is true concerning the force between the two wires:
The magnetic force is a repulsion between wires
The magnetic force is an attraction between the wires
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) A wire carries current I directed to the right as shown in the figure below. What is the direction of the magnetic field generated by the wire at point A?
To the right
To the left
Toward the wire
Into the page
Looking at the field lines in the picture above, the magnets, which orientation is possible?
South - South
North - South
South - North
A force of attraction or repulsion between the poles of two magnets.
magnets
magnetic poles
magnetic force
magnetic fields
