Download HW 2: Electric Fields Name: 1. Describe what is wrong with this

HW 2: ELECTRIC FIELDS
NAME: _______________________________
1. Describe what is wrong with this diagram of an electric field.
2. Identify whether each of the charges shown are + or –
3. Observe the electric field lines and rank the magnitude of each charge from smallest to highest.
4. The electric field around an isolated electron has a certain strength 1 cm from the electron. The electric
field strength 2 cm from the electron is
a. half as much.
b. the same.
c. twice as much.
d. four times as much.
e. none of the above
5. A point charge of 25 C experiences a force of 1.0 x 10-4 N. Calculate the electric field strength producing
this force.
6. What is the strength of the electric field 0.5 m away from a 12 C charge?
7 . The diagram shows a positive charge Q and a negative charge –Q with the same magnitude.
The electric field at point P on the perpendicular bisector of the line joining them is:
a.

b. 
c.

d.

e.
zero
8. An isolated point charge produces an electric field with magnitude E at a point 2 m away. At a point 1 m
from the charge the magnitude of the field is:
a.
b.
c.
d.
e.
E/4
E/2
E
2E
4E
9.The distribution of electric field lines in a certain region of space varies as shown in the figure.
The magnitude of the electric field in this region
A. increases in the downward direction.
B. decreases in the downward direction.
C. increases to the right
D. decreases to the right