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Electricity and circuits
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Created by
Jessie Azonwanna Pratt
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Cards (20)
What is a diode?
A
non-ohmic
conductor with
higher
resistance in one direction than the other
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How does a charged object create an electric field?
It creates a
non-contact
force on any other
charged
object in the field
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What are electrons?
Tiny
negatively
charged particles that move around the
nucleus
of an atom
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What is an
ion
?
A
charged
atom or
molecule
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What is a light-dependent resistor (LDR)?
A resistor whose
resistance
depends on the intensity of the
light
incident on it
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What is a light-emitting diode (LED)?
A diode that emits
light
when it
conducts
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What are
neutrons
?
Uncharged
particles of the same mass as
protons
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What does Ohm's law state?
The current through a resistor at constant temperature is directly
proportional
to the
potential difference
across the resistor
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What does the term "parallel" refer to in a circuit?
Components connected so that the
potential difference
is the
same
across each one
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What is potential difference?
A measure of the work done or energy transferred to the
lamp
by each
coulomb
of charge that passes through it
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What is the unit of potential difference?
The
volt
(
V
)
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How is resistance calculated?
Resistance
(in ohms, Ω) =
potential difference
(in volts, V) ÷ current (in amperes, A)
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What does "series" mean in a circuit?
Components connected in a circuit so that the
same current
passes through them
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What is static electricity?
Electric charge
stored on
insulated
objects
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What is a thermistor?
A
resistor
whose resistance depends on the
temperature
of the thermistor
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What are the key characteristics of a diode?
Non-ohmic
conductor
Higher
resistance in
reverse
direction
Lower
resistance in
forward
direction
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What is the relationship between current and potential difference according to Ohm's law?
Current is directly proportional to potential difference
Applies at
constant
temperature
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What are the differences between series and parallel circuits?
Series
:
Same
current
through all
components
Potential difference
divides among
components
Parallel
:
Same
potential difference
across all
components
Current
divides among
components
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A series circuit is when the components are
connected
one after another
A
parallel circuit
is a closed circuit where the current splits into two or more paths before
recombining
to complete the circuit.
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