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3rd Q Exam Review
Test Description: Electromagnetism
Instructions: Answer all questions to get your test result.
1) The South pole of a magnet will be
A
attracted to another South pole
B
unaffected by another magnet
C
attracted to a North pole
D
repelled by a North pole
2) Lines of the magnetic field around a current carrying wire
A
make a circle
B
are parallel to the wire
C
are directed towards the wire
D
are directed away from the wire
3) Where is the strength around the permanent magnet the greatest?
A
It is the same at all locations around the magnet
B
In the middle of the magnet
C
At the poles
D
At only the North Pole
4) This device converts mechanical energy to electrical energy
A
A battery
B
A generator
C
A switch
D
A motor
5) This device converts electrical energy to mechanical energy
A
A battery
B
A switch
C
A motor
D
A generator
6) Why does a compass point North?
A
It is where the North pole is located
B
It is where the magnetic North pole is located
C
It is where the South pole is located
D
It is where the magnetic South pole is located
7) in the second right hand rule, your fingers curl in the direction of the
A
current
B
electric field
C
magnetic field
D
resistance
8) In the second right hand rule, your thumb points in the direction of the
A
magnetic field
B
resistance
C
electric field
D
current
9) 'The magnetic field in an induced current in a conductor will oppose a change in the applied magnetic field' is known as
A
Coloumb's Law
B
Einstein's Law
C
Lenz's Law
D
Newton's Law of Universal Gravitation
10) The magnetic field around a permanent magnet
A
Goes from the North pole to the South pole
B
Makes circles around just the North pole
C
Makes circles around the middle of the bar magnet
D
Goes from the South pole to the North pole
11) Find the force on a current carrying wire if the wire is 1.4m, the field made is 6.0T, and there is 3.0A passing through it
A
25N
B
18N
C
1.4N
D
0.078N
12) The force on a wire is 15N. The field made is 2.5T and the current is 1.5A. How long is it?
A
4.0m
B
9.0m
C
0.25m
D
25m
13) If electrical current was going up in a wire, the magnetic field would
A
go clockwise around the wire
B
go to the left of the wire
C
go counter clockwise around the wire
D
go to the right of the wire
14) A magnet that can have its magnetic field 'turned on and off' is also known as
A
A South pole magnet
B
a temporary magnet
C
a permanent magnet
D
A North pole magnet
15) Which is true regarding magnets?
A
Opposite poles repel
B
Two South poles would attract
C
Opposite poles attract
D
Like poles attract
16) Which case would cause an attractive force?
A
two North pole magnets
B
two protons
C
Two electrons
D
A proton and an electron
*select an answer for all questions
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