A negatively charged particle is moving to the right, directly above a wire having
a current flowing to the right, as shown in the fiure. In which direction is the
magnetic force exerted on the particle?
-Q
xfiv
| —
The magnetic force is zero since the velocity is parallel to the current
upward
A uniform magnetic field of magnitude 0.80 T in the negative z direction is
present in a region of space. A uniform electric field is also present and is set at
76,000 V/m in the +y direction. An electron is projected with an initial velocity vq
= 9.5 x 10* m/s in the +x direction. The y-component of the initial force on the
electron is closest to which of the following quantities?
+2.4x1014N
1.0x 104N
#1.0x 10714N
2.4x1074N
Zero
, A ring with a clockwise current (as seen from above the ring) is situated with its
center directly above another ring, which has a counterclockwise current, as
shown in the figure. In what direction is the net magnetic force exerted on the
top ring?
Viewer A.
il
uoward
A long straight conductor has a constant current flowing to the right. A wire
rectangle is situated above the wire, and also has a constant current flowing
through it (as shown in the figure). Which of the following statements is true?
Z
N
A4
| —»
The net magnetic force on the wire rectangle is downward, and the net N
torque on it is zero.
a current flowing to the right, as shown in the fiure. In which direction is the
magnetic force exerted on the particle?
-Q
xfiv
| —
The magnetic force is zero since the velocity is parallel to the current
upward
A uniform magnetic field of magnitude 0.80 T in the negative z direction is
present in a region of space. A uniform electric field is also present and is set at
76,000 V/m in the +y direction. An electron is projected with an initial velocity vq
= 9.5 x 10* m/s in the +x direction. The y-component of the initial force on the
electron is closest to which of the following quantities?
+2.4x1014N
1.0x 104N
#1.0x 10714N
2.4x1074N
Zero
, A ring with a clockwise current (as seen from above the ring) is situated with its
center directly above another ring, which has a counterclockwise current, as
shown in the figure. In what direction is the net magnetic force exerted on the
top ring?
Viewer A.
il
uoward
A long straight conductor has a constant current flowing to the right. A wire
rectangle is situated above the wire, and also has a constant current flowing
through it (as shown in the figure). Which of the following statements is true?
Z
N
A4
| —»
The net magnetic force on the wire rectangle is downward, and the net N
torque on it is zero.
