| 121. |
| The four electron beams shown to the
right enter the magnetic field. Which beam will be deflected
to the right of the screen?
Answer
|
 |
|
|
|
|
|
|
| 122. |
A 6.00 m wire is
moving at a constant 7.00m/s perpendicular to a magnetic field having a
flux density of 5.00 N amp -1 m -1. What is
the potential difference induced in the wire? Answer
|
|
A. |
4.28 volts |
C. |
8.40 volts |
|
B. |
5.83 volts |
D. |
210. volts |
|
|
|
|
|
| 123. |
| Where is the magnetic field the
strongest?
Answer
|
 |
|
|
|
|
|
|
| 124. |
| Where is the magnetic field the
weakest?
Answer
|
|
|
|
|
|
|
|
| 125. |
The speed of an
alpha particle is 4.5 x 10 4 m/s and the magnitude of the
magnetic force is
7.5 x 10 -15 N. What is the magnitude of the magnetic
field? Answer
|
|
A. |
0.521 T |
C. |
8.3 x 10 -20 T |
|
B. |
1.04 T |
D. |
1.6 x 10 -20 T |
|
|
|
|
|
| 126. |
A positively charged
rod is brought close to a grounded electroscope but does not touch the
electroscope. The ground connection is broken while the rod remains
close. The positively charged rod is then removed. What type
of charge remains on the electroscope? Answer
|
|
A. |
A temporary positive charge |
C. |
A permanent positive charge |
|
B. |
A temporary negative charge |
D. |
A permanent negative charge |
|
|
|
|
|
| 127. |
| Sphere A
to the right has a charge of - 4.0 x 10 -5 C and sphere B
has a charge of - 6.0 x 10 -3 C. How far apart are
the spheres if there is a 150 N repulsive force? Answer |
 |
|
|
A. |
2.50 m |
C. |
6.25 m |
|
B. |
3.79 m |
D. |
14.4 m |
|
|
|
|
|
| 128. |
The 5.0 x 10 -14 kg oil
drop to the right has a charge of -3.2 x 10 -19 C.
The oil drop is suspended in midair. What is the magnitude of
the electric field intensity? Answer
A. 6.53 x 10 -7
C. 1.59 x 105
B. 6.27 x 10 -5
D. 1.53 x 106 |
 |
|
|
|
|
|
|
| 129. |
| What is the direction of the magnetic
field created by the circular wire and battery to the right?
Answer
A.
counterclockwise
C. into the page
B.
clockwise
D. out of the page |
 |
|
|
|
|
|
|
| 130. |
| At least two of the charged spheres to
the right are negatively charged. Which sphere, if any, could
be positively charged?
Answer
|
 |
|
|
A. |
sphere A |
C. |
sphere C |
|
B. |
sphere B |
D. |
no sphere |
