Download chapter 29-30 quiz

1- A long straight wire carries current I = 10 A
pointing into the page at the origin. In addition to
the magnetic field due to the wire, there is a
uniform external magnetic field B0 = 2 μT directed
along the positive y-axis as shown in the figure.
Wht is The total magnetic filed (in μT) at point P
2- A uniform magnetic field B is directed into the page. An electron
enters this field with initial velocity v to the right. Which of the following
best describes the path of the electron while it is still within the
magnetic field?
A)It moves in a straight line.
B) It bends upward in a parabolic path.
C) It bends downward in a parabolic path.
D) It bends upward in a circular path.
E) It bends downward in a circular path.
3- A long straight wire carrying a 3 A current enters a room
through a window 1.5 m high and 1 m wide. The path
integral B ∫ ds⋅
1-Two long, straight, parallel wires are 0.5m apart are placed as shown
in the figure. The left wire carries a current of I1=8A out of the plane of
the paper and the right wire carries a current of I2=6A into the plane of
the paper.
Y
(a) What is the net magnetic field at point
P1{ Give its magnitude and direction}
2-An ion with a charge of + 3.2 × 10–19 C is in a region where a
uniform electric field of magnitude 5 × 104 V/m is perpendicular to a
uniform magnetic field of magnitude 0.8 T. If its acceleration is zero
what its speed.
3-An electron (charge = –1.6 × 10–19C) is moving at 3 × 105 m/s in
the positive x direction. A magnetic field of 0.8 T is in the positive z
direction. The magnetic force on the electron is
1-Two long, straight, parallel wires are 0.5m apart are placed as shown
in the figure. The left wire carries a current of I1=8A out of the plane of
the paper and the right wire carries a current of I2=6A into the plane of
the paper.
(a) What is the net magnetic field at point P1
{ Give its magnitude and direction}
2-An ion with a charge of + 3.2 × 10–19 C is in a region where a
uniform electric field of magnitude 5 × 104 V/m is perpendicular to a
uniform magnetic field of magnitude 0.8 T. If its acceleration is zero
what its speed.
a =0
Fe  FB
v is Constance in magnitude and direction
qE  qvB sin 
E 5 10
4
v 
 6.8 10 m/s
B
0.8
4
  90
o
3-An electron (charge = –1.6 × 10–19C) is moving at 3 × 105 m/s in
the positive x direction. A magnetic field of 0.8 T is in the positive z
direction. The magnetic force on the electron is
F  qvB sin 
F  1.6  10
-19
 3  10 ( i )  0.8(k)
 3.84  10 -14 N
5
(positive y )
1- A long straight wire carries current I = 10 A pointing into the page at
the origin. In addition to the magnetic field due to the wire, there is a
uniform external magnetic field B0 = 2 μT directed along the positive yaxis as shown in the figure. Wht is The total magnetic filed (in μT) at
point P
0 I 4 10 10
B

2a
2 1
7
 2 10 T  2T in the negative y - axis
7
3- A long straight wire carrying a 3 A current enters a room
through a window 1.5 m high and 1 m wide. The path
integral B ∫ ds⋅
B  ds  o I
7
 4  3.14 10  3  37.68 10
7
T. m
2- A uniform magnetic field B is directed into the page. An electron
enters this field with initial velocity v to the right. Which of the followin
best describes the path of the electron while it is still within the
magnetic field?
A)It moves in a straight line.
B) It bends upward in a parabolic path
C) It bends downward in a parabolic path.
D) It bends upward in a circular path.
E) It bends downward in a circular path.
1-A rectangular loop of wire has dimensions a × b and includes a
resistor R. This loop is pulled with speed v from a region of no magnetic
field into a uniform magnetic field B pointing through the loop, as
shown above. What is the magnitude and direction of the current
through the resistor?
A) Bav/R, left-to-right
B )Bbv/R, left-to-right
C) Bav/R, right-to-left
D) Bbv/R, right-to-left
E) Bba/R, right-to-left