MIDTERMS - LESSON 1 Flashcards
The glow in the
filament of an
incandescent lightbulb
is caused by the
_______
passing through it.
electric current
Any movement of charges from one region to another
is called ____.
Current
defined as the net
charge flowing through an area per unit time.
electric current
a French physicist and mathematician, who laid the foundations
of electrodynamics, now known as electromagnetism
André-Marie Ampère
Charges flowing through a surface can be ___,____,or____
positive,
negative, or both.
In metals, moving charges or charge carriers are always ___.
Negative
The ________ is defined based on the
direction of the flow of positive charges.
Conventional current
The opposite of the conventional current is ___
Electron flow
A ___ is a device
that allows current to
flow in one direction
while restricting its
flow in the other
direction.
diode
To function as such, it
should have low
resistance in one
direction but has a
high resistance in the
other direction.
Polarized ends
What is an example of a semiconductor
Silicon
____ is the opposition of a material to the flow of
charges.
Resistance
This flow is hindered by the _______ within the conductor.
Collision of Atoms
____ is also defined as the proportionality factor
between the voltage and the current passing through
the wire
Resistance
The SI unit for resistance is the ___, abbreviated as Ω,
which is the Greek capital letter ___.
ohm
omega
● ____ is the measure of resistance of a specific material for a given dimension.
● It is abbreviated as ⍴, which is the Greek letter ___.
Resistivity
rho
The resistance of a conductor is affected by the ____,____and ____.
Length, arear, and type of material
Every material has a specific value for resistivity,
depending on its _____and ____
Atomic structure and temperature
____ is
considered as one of
the foundations of
electronics. Its uses span across both
domestic and
industrial applications.
Ohm’s law
A conductive path that permits the continuous flow of
charge, called ___, driven by the ___ and opposed
to some degree by ____, forms an electric circuit.
current
voltage
resistance
Ohm’s law states that the amount of current in a given
circuit is determined by the amount of ___and____ present in the system.
Voltage and resistance
Ohm’s discovery revealed that “the amount of current
flowing through a conducting material in a circuit is
______ to the potential difference across it”.
directly proportional
