Directions: Read and analyze each question carefully. Circle the letter of the best answer.
1. A charged object is brought near a metal ball that is mounted on a rubber
sheet. If the metal ball acquired a negative charge after it was grounded
momentarily, what must be the charge of the object that was brought near it?
A. Neutral
B. Positive
C. Negative
D. Both Positive and Negative
2. Which of the following describes the usual way by which a material can gain
a positive charge?
A. By gaining protons
B. By gaining electrons
C. By losing protons
D. By losing electrons
3. Which of the following statements about atomic structure is not true?
A. Atoms are mostly empty spaces.
B. All atoms of the same atomic number are atoms of the same element.
C. Most of the mass of the atom is concentrated at the nucleus.15
D. an atom can gain or lose electrons without charging its charge
4. Which of the following can be attracted by a positively charged object?
A. positively charged object.
B. negatively charged object.
C. A neutral object.
D. Both positive and negatively charged object
5. A build up charge of an object is called
A. Conduction
B. Static electricity
C. Induction
D. Friction
6. If you comb your hair and the comb becomes positively charged, what will
happen to your hair?
A. It will remain uncharged
B. It will be repelled by the comb.
C. It will become positively charged.
D. It will become negatively charged.
7. By direct touch, charging an object is
A. Conduction
B. Grounding
C. Friction
D. Induction
8. These are good conductors because they have loose electrons.
A. copper
B. metal
C. aluminum
D. All of the above
9. What do you call the process of charging a conductor by bringing it near
another charged object?
A. induction
B. polarization
C. neutralization
D. conduction
10. A negatively charged rod is brought near a metal can that rests on a
wooden box. You touch the opposite side of the can momentarily with your
finger. If you remove your finger before removing the rod, what will happen to
the can?
A. It will be discharged.
B. Its charge will remain as it was.
C. It will become positively charged.
D. It will become negatively charged.
11. What is really meant when we say an appliance "uses up" electricity?
A. The current disappears.
B. The main power supply voltage is lowered.
C. Electrons are taken out of the circuit and put somewhere else.
D. The potential energy of electrons is changed into another form.
11. What will happen when two like charges are brought together?
A. They will repel each other.
B. They will attract each other.
C. They will neutralize each other.
D. They will have no effect on each other.
12. Transferring a charge without touching is known as
A. Conduction
B. Friction
C. Induction
D. grounding16
13. An instrument that detects an electric charge through conduction is a/an
A. Electroscope B. Microscope
C. Conductor scope
D. Isotope
14. When a positively charged object is used to charge a neutral conduction
sphere by contact, the resulting charges will be ____________.
A. The sphere is now neutral and the object is negative
B. The sphere is now positive and the object is negative
C. Both the sphere and the object are negative
D. Both the sphere and the object are positive
15. Which of the following groups of materials are considered good conductors?
A. glass, rubber, aluminum, ceramic, copper
B. glass, rubber, ceramic, dry wood
C. silver, rubber, aluminum, ceramic, wet wood
D. aluminum, copper, gold, silver