Electric Fields
Practice Test
1.
A positive test charge of 9.0 × 10
-5
" to "9.0×10
-5
C is in an electric field that exerts a force of 3.7×10
-5
N on it. What is the magnitude of the electric field at the location of the test charge?
a.
4.1 N/C
b.
2.4 N/C
c.
0.41 N/C
d.
0.24 N/C
Hint
2.
The __________ is a vector quantity that relates the force on a test charge to the size of the charge.
a.
capacitor
b.
equipotential
c.
potential
d.
electric field
Hint
3.
In the set-up of Figure 21-9, if the electric force up on a drop equals the gravitational force down on the drop, the drop ___.
a.
must be stationary
b.
will accelerate down
c.
could move upward at constant speed
d.
will accelerate up
Hint
4.
The ratio of charge stored to electric potential difference is called the __________.
a.
current
b.
resistance
c.
capacitance
d.
capacitor
Hint
