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Electricity (Pt. II)
Test Description: Physics Olympics Part II
Instructions: Answer all questions to get your test result.
1) A 'ground' is simply a
A
place you faint on when you get an electric shock.
B
large object that serves as an almost infinite source of electrons or sink for electrons.
C
small object that serves to reset plugs/outlets.
D
large object that helps you not get shocked.
2) Two neutral conducting cans are touching. A (-) charged balloon is brought near Can X. As the balloon approaches, there is a movement of electrons between the balloon and Can X.
A
TRUE
B
FALSE
3) Charging by conduction involves
A
the contact of a charged object to an oppositely charged object.
B
the contact of a charged object to a neutral object.
C
the contact of a negatively charged object to a positively charged object.
D
the contact of a positively charged object to a positively charged object.
4) Coulomb's Law takes into account:
A
quantity of two charges, their distance, and Coulomb's law constant, k.
B
quantity of two charges and the distance between the two.
C
Newton's laws of inertia.
D
none of the above.
5) The Q in Coulomb's law equation stands for the
A
mass of a charged object
B
distance between the charged objects.
C
charge of a charged object
D
current of a charged object
6) The r in Coulomb's law equation stands for the
A
charge of a charged object
B
mass of a charged object
C
current of a charged object
D
distance between the charged objects.
7) 19. An originally neutral electroscope is grounded briefly while a positively charged glass rod is held near it. After the glass rod is removed, the electroscope
A
remains neutral
B
is positively charged
C
is negatively charged
D
could be either positive or negative, depends on how long contact occurred.
8) An atom has more electrons than protons. The atom is
A
a positive ion
B
a negative ion
C
a superconductor
D
a super-insulator
9) How can a negatively charged rod charge an electroscop positively?
A
By conduction.
B
It cannot.
C
By deduction.
D
By induction.
10) 16. An electron and a proton are separated by a distance of 1.0 m. What happens to the magnitude of the force on the f1st electron if a 2nd electron is placed next to the proton?
A
It doubles.
B
It becomes zero.
C
It does not change.
D
It is reduced to half.
*select an answer for all questions
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