Download File - Winnetonka AP Physics I

Self Check Quiz NROC Chap 10 Lesson 31:
__________
Name: _____________________ Score:
1. Four negative charges of a magnitude of -6 nC each form a square, 12 cm on a side. Find the
magnitude of electric field at the center of the square.
a. 22 N/C
b. 16 N/C
c. 8 N/C
d. 0.500 N/C
e. 0 N/C
Answer: _____
2. What is the electric force exerted on a charge of -1.2 μC at a point where the electric field is 2500
N/C?
a. - 0.15 N
b. 0.15 N
c. - 0.0030 N
d. 0.0030 N
Answer: _____
3. A +2 μC charge is at the origin. A +5 μC charge is on the x-axis at +1 m. At what point between the
charges is the electric field zero?
a. +10.0 cm
b. +18.8 cm
c. +38.7 cm
d. +45.0 cm
Answer: _____
4. Two point charges of +2.00 μC and -2.00 μC are 0.100 m apart. What is the electric field at the point
midway between the two charges?
a. 2.88 x 107 N/C
b. 1.44 x 107 N/C
c. 7.19 x 106 N/C
d. 0 N/C
Answer: _____
5. A proton in an electric field will experience a force acting ______________ the electric field.
a. parallel to and in the direction of
b. parallel to and in the opposite direction of
c. perpendicular to
d. along a constant potential line of
Answer: _____
6. Refer to the figure below. Find the magnitude of the electric field if the string with a 7 gram ball
carrying a charge of 4 x 10-9 C forms an angle of 35o with the
vertical.
a. 1.41 x 106 N/C
b. 1.20 x 107 N/C
c. 2.30 x 107 N/C
d. 6.25 x 108 N/C
Answer: _____
7. An electric field exerts force of 2.60 N on a 3.40 x 10-8 C charge. What is the magnitude of the
electric field?
a. 7.65 x 107 N/C
b. 8.43 x 107 N/C
c. 9.05 x 107 N/C
d. 12.0 x 107 N/C
Answer: _____
8. A 43 gram mass carrying a charge of 9 μC is suspended in a vertical upward-directed electric field.
What is the magnitude of the electric field?
a. 1.74 x 104 N/C
b. 3.72 x 104 N/C
c. 4.69 x 104 N/C
d. 8.40 x 104 N/C
Answer: _____
9. What is the magnitude and direction of the electric field generated by a 13 μC charge in a point 8.90
cm away from the charge?
a. 1.37 x 107 N/C, directed toward the charge
b. 2.06 x 107 N/C, directed toward the charge
c. 1.48 x 107 N/C, directed away from the charge
d. 0.650 x 107 N/C, directed away from the charge
Answer: _____
10. The 500 gram mass carries a charge of –7 x 10-8 C. If the coefficient of friction between the mass
and the surface is 0.20, and an electric field of magnitude 3 x 107 N/C is horizontal and directed to the
right, which is being treated as the positive x-direction. What is the acceleration of the
mass?
a. 2.2 m/sec2
b. - 2.2 m/sec2
c. 3.8 m/sec2
d. - 3.8 m/sec2
Answer: _____