quiz9 Flashcards
An Ideal capacitor does not dissipate power
True
The amount of charge that a capacitor can
store depends on the applied
Voltage
Capacitance is directly proportional to plate
spacing.
—False
. The difference in voltage between the
source and the capacitor decreases and hence
the rate of movement of electrons decreases
as the capacitor approaches full charge.
— True
Dielectric are the following, except;
— Copper
Unlike charges attract and like charges
repel a work exists between them.
False
If disconnected from the source, the
capacitor will automatically discharge.
— False
The unit of capacitance, the farad, is
named after James Faraday.
— False
Example of the dielectric used in fixed
capacitors.
— All of these Right
Variable Capacitors has a set of stationary
plates and a set of movable plates which are
ganged together and mounted on a shaft.
— True
Capacitor is a measure of how much
charge a capacitor can hold.
— False
Capacitors are widely used in______ and
_______ applications
—Electrical and Electronic
—Electrical and Electronic
Total capacitance is always smaller than
the biggest capacitance when connected
series.
— False
— False
The region where this force exists is called
an electric_____
—Field
A capacitor consists of two conductors
separated by an Insulator, called a
—- Dielectric
Dielectric is a factor by which capacitance
Increases for a number of different materials
based on the relative permittivity of ______
Air
As charge is deposited on the plates, the
capacitor_______ builds.
Voltage
The figure shows the uncharge state of the
capacitor.
True
The graph shows the current during
charging.
True
When the capacitor is discharged, this
stored energy is returned to the circuit.
True
The capacitance of a capacitor is one farad
If It stores one coulomb of charge when the
voltage across its terminals is ten volts.
False
Capacitance is directly proportional to plate
area.
True
___________ in a capacitor exists only
while capacitor voltage is changing
Current
The given circuit shows a charged
capacitor.
True
. Electric fields are force fields that exist in
the region surrounding charged bodies
True
Current in the circuit during charging is due
solely to the movement of electrons from one
plate to the other around the external circuit;
current passes through the dielectric between
the plates.
False
__________ is a circuit component
designed to store electrical charge.
Capacitor
. Faraday published his theory in 1844.
True
Fixed Capacitors are often identified by
their dielectric.
True
Total capacitance is the sum of the
individual capacitances when connected
parallel.
True
___________ Is the electrical property of
capacitors.
Capacitance
