Static Electricity
Practice Test
1.
Charges placed on a conductor ____________.
a.
stay where they are placed
b.
vanish after a few moments
c.
spread out over the surface of the conductor
d.
gather in the center of the conductor
Hint
2.
In Figure 14-2, if the scale of the graph is 1 block = 10 N on the vertical axis and one block = 2 cm on the horizontal axis, what is the spring constant?
a.
20 N/m
b.
250 N/m
c.
500 N/m
d.
5 N/m
Hint
3.
A wave that reflects off a flat surface will reflect at __________.
a.
a different angle from which it struck the surface
b.
the same angle at which it struck the surface
c.
an angle of zero
d.
a right angle to the surface
Hint
4.
If no other forms of energy besides kinetic and gravitational potential energy are present, then mechanical energy is represented by the equation __________.
a.
PE
g
=
E
+
KE
b.
M
E
= 1/2 (
KE
)(
PE
g
)
2
c.
PE
g
=
mgh
d.
E
=
KE
+
PE
g
Hint
5.
What does a wave carry?
a.
heat
b.
energy
c.
matter
d.
particles
Hint
6.
Heat spontaneously flowing from a cold body to a hot body violates the __________.
a.
first law of thermodynamics
b.
kinetic-molecular law
c.
second law of thermodynamics
d.
law of conservation of energy
Hint
7.
__________ describes how well the results of an experiment agree with the standard value.
a.
Precision
b.
Parallax
c.
Accuracy
d.
Significance
Hint
8.
In Figure 4-16c, if the box has a mass of 6.0 kg, what will the normal force of the table on the box be?
a.
9.8 N
b.
50 N
c.
8.8 N
d.
110 N
Hint
9.
Materials through which electrical charges will not move easily are called __________.
a.
conductors
b.
insulators
c.
ions
d.
grounders
Hint
10.
A large chunk of ice with mass 12.0 kg falls from a roof 6.00 m above the ground. Ignoring air resistance, what is the kinetic energy of the ice when it reaches the ground?
a.
-7.06×10
2
J
b.
7.06×10
3
J
c.
7.06×10
2
J
d.
-7.06×10
3
J
Hint
11.
The __________ of a wave can be used to determine how much energy is being transferred by the wave.
a.
amplitude
b.
frequency
c.
period
d.
speed
Hint
12.
In Figure 14-4, if you quadrupled the length of the string, what effect, if any, would it have on its period?
a.
The period would be halved.
b.
It would have no effect.
c.
The period would be doubled.
d.
The period would be quadrupled.
Hint
13.
A perpetual motion machine violates which law?
a.
first law of thermodynamics
b.
third law of conservation
c.
first law of gravity
d.
third law of thermodynamics
Hint
14.
Looking at the situation in Figure 12-8, and using the same color scheme as in the figure, how would the block in part b be shaded after a really long time? Assume the two blocks have the same mass.
a.
The left half would be blue and the right half would be yellow.
b.
The left half would be yellow and the right half would be blue.
c.
The whole block would be red.
d.
The whole block would be green.
Hint
15.
__________ describes the degree of exactness in a measurement.
a.
Parallax
b.
Accuracy
c.
Significance
d.
Precision
Hint
16.
The SI standard unit of charge is the __________.
a.
volt
b.
joule
c.
coulomb
d.
ohm
Hint
17.
A 75-kg person pushes a 12-kg person in a swing with a force of 3 N. What is the acceleration of the person doing the pushing?
a.
0.25 m/s
2
b.
0.04 m/s
2
c.
0.4 m/s
2
d.
25 m/s
2
Hint
18.
Three particles are placed in a line. The left particle has a charge of -47
m
C, the middle, +59
m
C, and the right, -91
m
C. The middle particle is 55 cm from each of the others. What is the net force on the middle particle?
a.
77 N, left
b.
83 N, right
c.
77 N, right
d.
160 N, right
Hint
19.
Thermodynamics is the study of __________.
a.
sound
b.
stars
c.
heat
d.
light
Hint
20.
A standing wave appears to be __________.
a.
moving very slowly
b.
standing still
c.
fluctuating
d.
moving very fast
Hint
