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Chapter 2 Electricity Sections 1 Thru 3 Part B
Test Description: Electric current, batteries, electric circuits
Instructions: Answer all questions to get your test result.
1) A device that transforms stored chemical energy into electrical energy is a(n)
A
electroyte.
B
electrochemical cell.
C
electrode.
D
terminal.
2) What parts of the cell are used to connect an electrochemical cell to a circuit?
A
electrolytes
B
terminals
C
electrodes
D
wet cells
3) The ampere is a unit of
A
maganetism.
B
electric current.
C
electric charge.
D
temperature.
4) An example of an insulator is
A
copper.
B
silver.
C
iron.
D
rubber.
5) Materials that allow the charges of an electric current to move freely through them are called
A
insulators.
B
resistors.
C
magnets.
D
conductors.
6) A complete, unbroken path through which electric charges can flow is a(n)
A
electric circuit.
B
magnetic pole.
C
magnetic field line.
D
electrical resistance.
7) A device that creates a potential difference in an electric circuit is a(n)
A
insulator.
B
voltage source.
C
conductor.
D
circuit.
8) The unit of measure of voltage is the ohm.
A
Don't know.
B
True
C
Don't care.
D
False
9) Batteries and generators are examples of________, which create a potential difference in a circuit
A
voltage sources
B
insulators
C
circuits
D
ohms
10) What type of overall charge does a balloon have after rubbing it on a cloth?
A
Positive
B
Negative
C
Uncharged.
D
Electrically neutral.
11) The continuous flow of charges through a material is called electric
A
current.
B
circuit.
C
battery.
D
voltage.
12) A material in which charges cannot flow easily is a(n)
A
funnel.
B
circuit.
C
conductor.
D
insulator.
13) If two wires of the same material have the same thickness but different lengths, the
A
answer is not given.
B
shorter wire will have greater resistance.
C
longer wire will have greater resistance.
D
longer wire will have the least resistance.
14) When there is less current for a given voltage, there is
A
less amps.
B
less resistance.
C
greater resistance.
D
greater amps.
15) What states that charges are not created or destroyed?
A
Law of conservation of energy
B
Law of conservation of charges
C
Newtons third law
D
Law of conservation of matter
16) The strength of the electric field of a charged particle becomes greater as the distance from the particle
A
decreases
B
explodes.
C
remains the same.
D
increases.
*select an answer for all questions
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