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_ 25. Which atom pictured below is electrically neutral? 3 P 9 P 16 P 1 P A) amoje B) MIND-jg C)

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_ 25. Which atom pictured below is electrically neutral? 3 P \\ 9 P \\ 16 P \\ 1 P A) amoje B) MIND-jg C) 16140.)\" D) 1N0 _ 26. In which direction will the positively charged ball shown below move? The rods are equally charged. #1 G) N/, B) C) D) _ 27. A negatively charged rod is brought near the right hand side of two neutral metal spheres that are touching one another while insulated rm the ground. The spheres are then separated and the rod is taken away. Which pair of spheres shows the correct signs of each sphere's net charge? \"\"99 B'GDG) (\"QED Di _ 28. Using the amount of charge of a single electron or proton1 one can determine how many such particles would be needed to form one Coulomb of charge. How many is that? A) 1.6 X 10'19 B) 1.6 X 10\" C) 6.25 K 10'\" D) 6.25 X 1013 _ 29. Two objects exert an electric force of size F on each other. If the charge on each object is doubled, the electric force will now be... A) 'AF B) F C) 2F D) 4F _ 30. Two objects exert an electric force of size F on each other. If the objects are moved three times closer together (so at is being reduced), the electric force will now be... A) 1:3}? B) 31" C) 19}? D) 9F Critical Thinking Electric charges can be collected in a glass jar; this device is a type of capacitor. The diagram shows a Leyden jar. It is made by covering the inner and outer surfaces of a glass jar with separate pieces of metal foil. A metal rod, with a metal knob at the end, protrudes through the top of the jar, and a metal chain connected to the rod touches the metal foil inside the jar. A rubber rod is rubbed with fur and touched to the metal knob on top of the Leyden jar. _ 31. . What is the charge on the metal foil on the outside of the jar? What is the charge on the metal foil on the inside of the jar? A) positive B) negative C) there will be no charge on that piece of foil A) positive B) negative C) there will be no charge on that piece of foil

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