Assertion: inductor's energy | /r/AtLocation | magnetic field
Facets:
value: as a rubber band stores energy
type: MANNER
value: unlike in capacitors
type: OTHER
value: as the magnetic lines of force
type: MANNER
value: temporarily
type: MANNER
value: around the inductor
type: LOCATION
value: for a given current
type: TEMPORAL
value: as current rises
type: TEMPORAL
value: in the coil
type: LOCATION
Source sentences:
text: When a current flows through it, energy is stored in a magnetic field in the coil.
text: The energy of running current through an inductor is stored as a magnetic field.
text: When power flows into an inductor, energy is stored in its magnetic field.
text: The energy is actually being stored within the magnetic field that surrounds the inductor by the current flowing through it.
text: When a current flows through it, energy is stored temporarily in a magnetic field in the coil.
text: Reactance is measured in ohms but referred to as impedance rather than resistance; energy is stored in the magnetic field as current rises and discharged as current falls.
text: But unlike capacitors, inductors have very severe limitation as to how long energy can be stored because energy is stored in the magnetic field which can collapse anytime if power is removed.
text: Inductance is therefore also proportional to the energy stored in the magnetic field for a given current.
text: Energy will be stored in the magnetic field.
text: The electrical energy applied to the inductor has now been converted into magnetic energy and is stored in the magnetic field set up around the inductor.
text: If the voltage applied to the inductor is now switched off, the energy stored in the magnetic field is released back into the coils of the inductor, this time there is no opposing supply voltage applied so the entire magnetic field collapses instantly, and the stored energy, now in the form of a voltage across the inductor, but with opposite polarity to the original applied voltage.
text: As current through L begins to build however, the rate of change of the magnetic field reduces, the oppostion due to the back EMF reduces and the apparent 'resistance' of the inductor falls to a low value (the real resistance of the wire coil) and the voltage V L decreases until a point is reached where the whole of the battery voltage is being developed across the resistor R; the voltage or potential difference (pd) across L is practically zero and energy is now stored in the magnetic field around the inductor.
text: However, unlike in capacitors, the energy in inductors is stored in the magnetic field surrounding the inductor.
text: Instead, the energy is stored in the magnetic field as the rising current forces the magnetic lines of force to expand against their tendency to become as short as possible—somewhat as a rubber band stores energy when it is stretched.
text: When the current remains constant, the energy stored in the magnetic field is also constant.
text: It responds to this by generating a large voltage with the opposite polarity of the voltage originally supplied to it using the energy stored in the magnetic field to maintain that current flow.
text: Inductors can store energy for a small period of time because the energy which is being stored as magnetic field will be gone when power supply is removed.
text: In this condition, the inductor is said to be charging, because there is an increasing amount of energy being stored in its magnetic field.
text: As electricity passes through the inductor, energy is captured and stored within the magnetic field.