1. When two dissimilar materials contact each other some of the electrons in one material will be drawn into the other material, this effect can be increased by rubbing the two surfaces together. What charging process is involved? A. charging by conduction B. charging by friction C. charging by induction D. all of the above
Choose the letter of the best answer.
1. When two dissimilar materials contact each other some of the electrons in one material will be drawn into the other material, this effect can be increased by rubbing the two surfaces together. What charging process is involved?
A. charging by
B. charging by friction
C. charging by induction
D. all of the above
2. A student has a neutrally charged glass rod and a neutrally charged silk cloth. When the student rubs the silk cloth on the glass rod, the rod acquires a net positive charge. What is the charge on the silk cloth after
the student performs this experiment?
A. the silk has no charge
B. the silk has a charge that is equal in magnitude to the glass rod’s charge, but it is negative
C. the silk is positively charged and has a greater magnitude of charge than the glass rod
D. the silk is negatively charged and has a smaller magnitude of charge than the glass rod
3. All matters are said to be neutral wherein the numbers of electron and protons are equal so once charges it do not stay for a long time because of the following factors except;
A. amount of charge gain
B. presence of polar molecules
C. type of charge
D. type of material
4. Rubber is a nonconducting material that is why it cannot easily conduct heat and electricity. Which is the best explanation for this situation?.
A. it has excess electrons which are loosely bounded with its nuclei so it can free to move
B. it has a deficiency in electrons which are tightly bounded with their nuclei so it can not move freely
C. it has few electrons
D. it has no electrons
5. A negatively charged object is brought close to the surface of a conductor, whose opposite side is then grounded. What kind of charge is left on the conductor’s surface?
A. neutral
B. negative
C. positive
D. both positive and negative
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