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Electrostatics Practice Test
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Q1
A neutral conducting sphere rests on an insulating styrofoam block. A student then places his hand on the sphere, maintaining this contact as a negatively charged plastic rod is brought near the sphere without touching. While the plastic rod is still nearby, the student removes his hand. Finally, the rod is also removed. Which of the following best describes the final charge on the sphere?
A neutral conducting sphere rests on an insulating styrofoam block. A student then places his hand on the sphere, maintaining this contact as a negatively charged plastic rod is brought near the sphere without touching. While the plastic rod is still nearby, the student removes his hand. Finally, the rod is also removed. Which of the following best describes the final charge on the sphere?
lightbulb running for 
minutes?