Chapter 2 Electricity Sections 1 Thru 3 Part B Question Preview (ID: 25157)
Electric Current, Batteries, Electric Circuits.
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Batteries and generators are examples of________, which create a potential difference in a circuit
a) voltage sources
b) circuits
c) insulators
d) ohms
The unit of measure of voltage is the ohm.
a) True
b) False
c) Don't know.
d) Don't care.
A device that creates a potential difference in an electric circuit is a(n)
a) circuit.
b) voltage source.
c) insulator.
d) conductor.
A complete, unbroken path through which electric charges can flow is a(n)
a) magnetic field line.
b) magnetic pole.
c) electric circuit.
d) electrical resistance.
Materials that allow the charges of an electric current to move freely through them are called
a) resistors.
b) magnets.
c) conductors.
d) insulators.
An example of an insulator is
a) iron.
b) copper.
c) rubber.
d) silver.
The ampere is a unit of
a) temperature.
b) maganetism.
c) electric current.
d) electric charge.
What parts of the cell are used to connect an electrochemical cell to a circuit?
a) electrolytes
b) wet cells
c) terminals
d) electrodes
A device that transforms stored chemical energy into electrical energy is a(n)
a) electrode.
b) terminal.
c) electroyte.
d) electrochemical cell.
What type of overall charge does a balloon have after rubbing it on a cloth?
a) Positive
b) Negative
c) Uncharged.
d) Electrically neutral.
The continuous flow of charges through a material is called electric
a) current.
b) circuit.
c) voltage.
d) battery.
A material in which charges cannot flow easily is a(n)
a) insulator.
b) conductor.
c) circuit.
d) funnel.
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 greater resistance.
c) longer wire will have the least resistance.
d) answer is not given.
When there is less current for a given voltage, there is
a) less amps.
b) greater amps.
c) less resistance.
d) greater resistance.
What states that charges are not created or destroyed?
a) Law of conservation of matter
b) Law of conservation of charges
c) Law of conservation of energy
d) Newtons third law
The strength of the electric field of a charged particle becomes greater as the distance from the particle
a) increases.
b) decreases
c) remains the same.
d) explodes.
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