On this worksheet you will continue working with charges at rest.
A metal sphere has a net negative charge of 8 × 10
coulomb. Approximately how many more electrons than protons are on the sphere?
5 x 10
2 x 10
7.81 x 10
1.28 x 10
Two protons are located one meter apart. Compared to the gravitational force of attraction between the two protons, the electrostatic force between the protons is
stronger and repulsive
weaker and repulsive
weaker and also attractive
stronger and also attractive
In the diagram below, a positive charge is located between two charged spheres, A and B. Sphere A has a charge of +2q and is located 0.55 meter from the central charge. Sphere B has a charge of –2q and is located 0.11 meters from the central charge.
If the magnitude of the force on the central charge due to sphere A is
, then what is the magnitude of the force on the central charge due to sphere B?
4 x 10
1.21 x 10
When a neutral metal sphere is charged by contact with a negatively charged amber rod, the sphere
Two similar metal spheres, A and B, have charges of +2.0 × 10
coulomb and +1.0 × 10
coulomb. The magnitude of the electrostatic force on A due to B is 4.8 newtons. What is the magnitude of the electrostatic force on B due to A?
Which of the following demonstrations was not a result of charge polarization?
a charged balloon sticking to a ceiling tile
a water stream 'bending' towards a charged balloon
a wooden stick being rotated on the watch glass by a charged balloon
the spark created by the Kelvin water drop generator
tiny pieces of paper confetti being 'scattered' by a charged balloon
Metal sphere A has a charge of –4 units and an identical metal sphere, B, has a charge of +6 units. If the spheres are brought into contact with each other and then separated, the charge on sphere B will be
What is the net electrical charge on a magnesium ion that is formed when a neutral magnesium atom loses two electrons?
-3.2 x 10
-1.6 x 10
+3.2 x 10
+1.6 x 10
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Catharine H. Colwell
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