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WorksheetsMagnetism/Electromagnetism Review
Total questions: 15
Worksheet time: 14mins
A loop of wire mounted on a glider is set in motion with constant velocity v to the right. As it enters the region of magnetic field,
there is a clockwise current in the loop and the glider slows down
there is a clockwise current in the loop and the glider speeds up
there is a counterclockwise current in the loop and the glider slows down
there is a counterclockwise current in the loop and the glider speeds up
Which equation describes the strength of the magnetic force exerted on a current-carrying wire?
Σ F=ma
FB=qvBsinθ
FE=qE
FB=ILBsinθ
A straight wire carrying a 9.0 A current is in a uniform magnetic field oriented at right angles to the wire. When 75 cm of wire is in the field, the force on the wire is 1.2 N. What is the strength of the magnetic field B?
B = 0.18 N
B = 0.18 T
B = 0.18 Cm
B = 1.08 T
An electron is in a uniform magnetic field B that is directed out of the plane of the page, as shown above. When the electron is moving in the plane of the page in the direction indicated by the arrow, the direction of the force on the electron is
toward the right
out of the page
into the page
toward the top of the page
toward the bottom of the page
A particle of charge +Q moving with speed v0 enters a region of constant magnetic field B directed into the page, as shown above. The initial direction and magnitude of the acceleration of the particle as it enters the magnetic field is toward the
bottom of the page and proportional to B
bottom of the page and proportional to both B and v0
top of the page and inversely proportional to v0
top of the page and inversely proportional to B
top of the page and proportional to both B and v0
A proton traveling with speed v enters a uniform electric field of magnitude E, directed parallel to the plane of the page, as shown in the figure above. There is also a magnetic force on the proton that is in the direction opposite to that of the electric force. If e represents the magnitude of the proton charge, what minimum magnitude of the magnetic field could balance the electric force on the proton?
E/v
eE/v
vE
eE
evE
In a region of space there is a uniform B field in the plane of the page but no E field. A positively charged particle with velocity v directed into the page is subject to a force F in the plane of the page as shown above. Which of the following vectors best represents the direction of B?
Which of the paths above represents the path of an electron traveling without any loss of energy through a uniform magnetic field directed into the page?
A
B
C
D
E
A ring is originally oriented 30-deg from the magnetic field. Which of the following would INCREASE the flux?
increasing the field
reversing the direction of the field
increasing 30-deg to 90-deg
decreasing 30-deg to 0-deg
Spinning the ring without changing its orientation
If the magnetic field were increased from B = 0.5 T to 1.0T, the current in the loop would be directed _______
clockwise
counterclockwise
into the page
out of the page
A moveable rod makes contact along two rails with a lightbulb attached. With the rod given a velocity to the right, the force on the rod due to the induced current is _____
to the right
to the left
there is no force
A moveable rod makes contact along two rails with a lightbulb attached. As the rod is moved to the right, a current is induced _________.
counterclockwise
clockwise
into the page
out of the page
