Science Nine Chapter Seven: Question Preview (ID: 4189)

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A neutral object has exactly the same number of
a) protons and neutrons b) protons and electrons c) neutrons and electrons d) protons, neutrons, and electrons
A vinyl rod is rubbed with a cotton cloth. The vinyl rod becomes (-) charged and the cotton cloth becomes (+) charged. Which of the following describes the cotton cloth?
a) it has gained electrons b) it has more electrons than protons c) it has more protons than electrons d) it has the same number of protons as electrons
Which of the following is a good conductor?
a) glass b) wood c) copper d) fur
Charges are measured in
a) coulombs b) ohms c) amperes d) watts
Two suspended balloons repel each other when brought together. What can you conclude about the balloons?
a) they have opposite charges b) they both have the same charge c) one balloon is neutral and the other balloon is positively charged d) one balloon is neutral and the other balloon is negatively charged
Which of the following is not a law of static charge?
a) objects with the same charge repel each other b) objects with the same chage attract each other c) objects with opposite charges attract each other d) charged objects attract neutral objects
The tool that can be used to detect static charges is called a(n)
a) spectroscope b) magnetoscope c) electroscope d) protoscope
Electric forces that act on any pair of objects DOES NOT depend on which of the following
a) the type of charge on the objects b) the mass of the objects c) the amount of charge on the objects d) the distance between the objects
Which of the following is an example of an insulator?
a) copper b) salt water c) a lemon d) rubber
A Van de Graaff generator produces charges by using
a) glass ball bearings b) blue lasers c) rubber belts d) tiny leprechauns
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