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