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Electricity
Test Description: Part I - Physics Olympics
Instructions: Answer all questions to get your test result.
1) A neutron carries a(n)
A
variable chage.
B
negative charge.
C
no charge (neutral).
D
positive charge.
2) A glass rod is rubbed with a piece of silk. During the process, the glass rod
A
acquires a negative charge and the silk remains neutral.
B
acquires a positive charge and the silk acquires a negative charge..
C
acquires a negative charge and the silk acquires a negative charge also.
D
acquires a positive charge and the silk acquires a positive charge also.
3) Atoms are composed of
A
electrons, protons and neutrons in orbitals.
B
protons and electrons in the nucleus, and neutrons balancing them out.
C
neutrons in the nucleus, protons and electrons in the surrounding space.
D
protons and neutrons located in the nucleus, and electrons in the surrounding space.
4) Choose the statement that is FALSE.
A
A positively charged object contains less electrons than protons.
B
The charge possessed by an object is expressed using the scientific unit the Coolie
C
The charge on a single electron is -1.6 x 10 -19 C; on a single proton is +1.6 x 10 -19 C.
D
Compared to electrons, protons and neutrons are massive.
5) Like charges objects will exhibit
A
repulsion
B
friction
C
static
D
attraction
6) Choose the statement that is FALSE.
A
Examples of conductors include metals, aqueous solutions of salts, water & the human body.
B
It is impossible for two electrons to attract each other.
C
A wooden spoon is an insulator.
D
The inverse relationship of charges means the larger the field affected, the less the effect.
7) Induction can cause polarization.
A
FALSE
B
TRUE
8) During conduction,
A
objects must touch, causing a transfer of electrons.
B
objects must touch, causing polarization.
C
objects must not touch, causing a transfer of electrons.
D
objects must not touch, or else polarization will occur.
9) A conductor differs from an insulator in that a conductor
A
has faster moving molecules.
B
has an excess of protons and electrons.
C
none of these.
D
does not have any neutrons to get in the way of electron flow.
10) During a physics lab, a plastic strip was rubbed with cotton & became positively charged because
A
the plastic strip acquired extra protons from the cotton
B
the plastic strip acquired extra protons during the charging process
C
protons were created as the result of the charging process
D
the plastic strip lost electrons to the cotton during the charging process
*select an answer for all questions
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