Chapter 17 Review

1. When silk is rubbed onto a glass rod, this leaves a _______________ charge on the glass rod.

1. positive

2. negative

3. neutral

2. Charging by induction is when a charged object touches an uncharged object.

1. True

2. False

3. Compare an electron and a proton

1. They have the same mass but opposite charge.

2. The proton more massive and is positive while the electron is negative.

3. They electron is more massive and is negative while the proton is positive.

4. none of the above

4. Two identical conducting spheres have charges of -15 x 10^-6 C and + 7 x 10^-6 C on them. When touched together and the separated the charge on each sphere is what?1. + 22 x 10^-6 C2. - 8 x 10^-6 C3. -4 x 10^-6 C4. 2.5 x 10^-6 C

5. If these two spheres are a distance of 35 cm apart, what is the electric force between them?

1. 1.17 N

2. .411 N

3. .000117N

4. .0117 N

6. Three charges rest on the x-axis. Q1 is at the origin (+4 uC), Q2 is at .4m (-3uC), and Q3 is at -.6 (- 8uC). What is the net electric force acting on Q2.

• 1. .891 N R

• 2. .459 N R

• 3. .891 N L

• 4. .459 N L

7. Two charges that have values of +8 uC and +12 uC are a distance of 40 cm apart.

How far from the +8 uC charge is Q3 if it experiences zero net force?

• 1. 1.78 m• 2. 2.17 m• 3. .179 m• 4. .220 m

8. What is the electric field produced by a 8 nC charge a distance of .75 meters away?

• 1. 128000 N/C

• 2. 128 N/C

• 3. 1.42 N/C

• 4. 40.5 N/C

9. All the charges are free to move on an insulator.

• 1. True

• 2. False

10. The E-Field inside a conductor is infinite.

• 1. True

• 2. False