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Electricity

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 
The brightness of a light bulb is determined by its filament’s
a.
amperes.
b.
watts.
c.
resistance.
 

 2. 
Whether or not charges will move in a material depends partly on how tightly _____ are held in the atoms of the material.
a.
neutrons
b.
electrons
c.
protons
 

 3. 
The resistance of an insulator is
a.
high.
b.
moderate.
c.
very low.
 

 4. 
Which of the following shows how conductors, insulators, superconductors, and semiconductors rank in order of least resistance to most resistance?
a.
superconductors, conductors, semiconductors, insulators
b.
semiconductors, superconductors, conductors, insulators
c.
insulators, conductors, semiconductors, superconductors
 

 5. 
Appliances connected so that they form a single pathway for charges to flow are connected in a(n)
a.
open circuit.
b.
closed circuit.
c.
series circuit.
 

 6. 
Positive charges _____ one another.
a.
join
b.
cancel
c.
repel
 

 7. 
The electric force between two objects _____ when the distance between them decreases.
a.
increases
b.
decreases
c.
remains constant
d.
None of the above
 

 8. 
Which of the following is a negatively charged particle?
a.
coulomb
b.
proton
c.
electron
 

 9. 
An electric cell is a source of electric current because of a _____ between the terminals.
a.
potential difference
b.
light bulb
c.
semiconductor
 

 10. 
The rate at which charges move through a conductor is called
a.
electrical potential energy.
b.
voltage.
c.
current.
 

 11. 
_____ is the opposition posed by a material to the flow of current.
a.
Resistance
b.
Ampere
c.
Charge
 

 12. 
In most cases, increasing the temperature of an object will _____ its resistance.
a.
decrease
b.
increase
c.
have no effect on
 

 13. 
A circuit breaker acts as a switch creating a(n) _____ circuit when current is too high.
a.
parallel
b.
series
c.
open
 

 14. 
There is a repulsive force between two charged objects when
a.
their charges are of unlike sign.
b.
they have the same number of protons.
c.
their charges are of like sign.
 

 15. 
Electric force varies depending on the
a.
mass and distance between charged objects.
b.
charge and distance between charged objects.
c.
height and mass of charged objects.
 

 16. 
Batteries typically have
a.
two negative terminals.
b.
one positive and one negative terminal.
c.
no terminals.
 

 17. 
Resistance is caused by
a.
electron charge.
b.
internal friction.
c.
proton charge.
 

 18. 
Every charged particle produces a(n)
a.
positive charge.
b.
magnetic field.
c.
electric field.
 

 19. 
A device that protects a circuit from current overload is called a
a.
capacitor.
b.
circuit breaker.
c.
closed circuit.
 

 20. 
What happens to the resistance of a superconductor when its temperature drops below the critical temperature?
a.
Resistance drops to zero.
b.
Resistance doubles.
c.
Resistance increases.
 



 
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