PHYSICS EXAM 3 QUESTIONS AND ANSWERS
A vertical wire carries a current straight down. To the east of this wire, the magnetic field points -
CORRECT ANSWER✅✅Toward the south
A current carrying loop of wire lies flat on a table top. When viewed from above, the current moves
around the loop in a counterclockwise sense.
a) For points OUTSIDE the loop, the magnetic field caused by this current:
b)For points INSIDE the loop, the magnetic field caused by this current: - CORRECT ANSWER✅✅a)Points
straight down
b)Points straight up
A horizontal wire carries a current straight toward you. From your point of view, the magnetic field at a
pint directly below the wire points: - CORRECT ANSWER✅✅To the right.
An electron moving in the direction of the +x-axis enters a magnetic field. If the electron experiences a
magnetic deflection in the -y direction, the direction of the magnetic field in this region points in the
direction of the: - CORRECT ANSWER✅✅-z-axis
An electron, moving toward the west, enters a uniform magnetic field. Because of this field the electron
curves upward. The direction of the magnetic field is: - CORRECT ANSWER✅✅Towards the North
Three particles travel through a region of space where the magnetic field is out of the page, as shown in
the figure. The electric charge of each of the three particles is, respectively: - CORRECT ANSWER✅✅1 is
negative(curve left), 2 is neutral(straight), and 3 is positive(curve right).
A charge is accelerated from rest through a potential difference V and then enters a uniform magnetic
field oriented perpendicular to its path. The field deflects the particle into a circular arc of radius R. If the
accelerating potential is tripled to 3V, what will be the radius of the circular arc? - CORRECT
ANSWER✅✅√3 R
Ions having equal charges but masses of M and 2M are accelerated through the same potential
difference and then enter a uniform magnetic field perpendicular to their path. If the heavier ions follow
A vertical wire carries a current straight down. To the east of this wire, the magnetic field points -
CORRECT ANSWER✅✅Toward the south
A current carrying loop of wire lies flat on a table top. When viewed from above, the current moves
around the loop in a counterclockwise sense.
a) For points OUTSIDE the loop, the magnetic field caused by this current:
b)For points INSIDE the loop, the magnetic field caused by this current: - CORRECT ANSWER✅✅a)Points
straight down
b)Points straight up
A horizontal wire carries a current straight toward you. From your point of view, the magnetic field at a
pint directly below the wire points: - CORRECT ANSWER✅✅To the right.
An electron moving in the direction of the +x-axis enters a magnetic field. If the electron experiences a
magnetic deflection in the -y direction, the direction of the magnetic field in this region points in the
direction of the: - CORRECT ANSWER✅✅-z-axis
An electron, moving toward the west, enters a uniform magnetic field. Because of this field the electron
curves upward. The direction of the magnetic field is: - CORRECT ANSWER✅✅Towards the North
Three particles travel through a region of space where the magnetic field is out of the page, as shown in
the figure. The electric charge of each of the three particles is, respectively: - CORRECT ANSWER✅✅1 is
negative(curve left), 2 is neutral(straight), and 3 is positive(curve right).
A charge is accelerated from rest through a potential difference V and then enters a uniform magnetic
field oriented perpendicular to its path. The field deflects the particle into a circular arc of radius R. If the
accelerating potential is tripled to 3V, what will be the radius of the circular arc? - CORRECT
ANSWER✅✅√3 R
Ions having equal charges but masses of M and 2M are accelerated through the same potential
difference and then enter a uniform magnetic field perpendicular to their path. If the heavier ions follow
