Ch 28 and Ch 29 Phys 232 Question
and answers already passed
2025/2026
In order to change the magnetic flux through the loop, what would you have to do? - correct answer
✔Moving the magnet in any direction would change the magnetic field through the loop and thus the
magnetic flux
If a North pole moves toward the loop from above the page, in what direction is the induced current? -
correct answer ✔Countercloockwise: The magnetic field of the moving bar magnet is pointing into the
page and getting larger as the magnet moves closer to the loop. Thus the induced magnetic field has to
point out of the page. A counterclockwise induced current will give just such an induced magnetic field.
If a north pole moves toward the loop in the plan of the page, in what direction is the induced current? -
correct answer ✔no induced current: Since the magnet is moving parallel to the loop, there is no
magnetic flux through the loop. Thus the induced current is zero.
A wire loop is being pulled through a uniform magnetic field. What is the direction of the induced
current? - correct answer ✔NO INDUCED CURRENT: Since the magnetic field is uniform, the magnetic
flux through the loop is not changing. Thus no current is induced.
When the switch is closed what is the initial current? Assume the wire has a resistance of R - correct
answer ✔Zero: Initially the wire opposes the change in current
A wire loop is being pulled through a uniform magnetic field that suddenly ends. What is the direction of
the induced current? - correct answer ✔clockwise: The B field into the page is disappearing in the loop,
so it must be compensated by an induced flux also into the page. This can be accomplished by an
induced current in the clockwise direction in the wire loop.
What is the direction of the induced current if the B field suddenly increases while the loop is in the
region? - correct answer ✔Counterclockwise:The increasing B field into the page must be countered by
and answers already passed
2025/2026
In order to change the magnetic flux through the loop, what would you have to do? - correct answer
✔Moving the magnet in any direction would change the magnetic field through the loop and thus the
magnetic flux
If a North pole moves toward the loop from above the page, in what direction is the induced current? -
correct answer ✔Countercloockwise: The magnetic field of the moving bar magnet is pointing into the
page and getting larger as the magnet moves closer to the loop. Thus the induced magnetic field has to
point out of the page. A counterclockwise induced current will give just such an induced magnetic field.
If a north pole moves toward the loop in the plan of the page, in what direction is the induced current? -
correct answer ✔no induced current: Since the magnet is moving parallel to the loop, there is no
magnetic flux through the loop. Thus the induced current is zero.
A wire loop is being pulled through a uniform magnetic field. What is the direction of the induced
current? - correct answer ✔NO INDUCED CURRENT: Since the magnetic field is uniform, the magnetic
flux through the loop is not changing. Thus no current is induced.
When the switch is closed what is the initial current? Assume the wire has a resistance of R - correct
answer ✔Zero: Initially the wire opposes the change in current
A wire loop is being pulled through a uniform magnetic field that suddenly ends. What is the direction of
the induced current? - correct answer ✔clockwise: The B field into the page is disappearing in the loop,
so it must be compensated by an induced flux also into the page. This can be accomplished by an
induced current in the clockwise direction in the wire loop.
What is the direction of the induced current if the B field suddenly increases while the loop is in the
region? - correct answer ✔Counterclockwise:The increasing B field into the page must be countered by
