Internal Resistance

Internal Resistance

A practical electrical power source which is a linear electric circuit may, according to Thévenin's theorem, be represented as an ideal voltage source in series with an impedance. This resistance is termed the internal resistance of the source. When the power source delivers current, the measured e.m.f. (voltage output) is lower than the no-load voltage; the difference is the voltage (the product of current and resistance) drop caused by the internal resistance. The concept of internal resistance applies to all kinds of electrical sources and is useful for analyzing many types of electrical circuits. Internal resistance can be caused by a number of outcomes, though a possible cause is by interior chemical instalment. When thermal energy is applied to provide the current, that applied energy is most of the power source's energy which produces the chemicals. The load current is delivered in a lap and returns to the battery (voltage source) and then performs resistance.

Read more about Internal Resistance:  Batteries

Other articles related to "internal resistance, resistance":

Nickel–metal Hydride Battery - Discharging - Low Self-discharge Cells
... depends a lot on the battery's impedance or internal resistance (the lower the better), and on the size of the battery as well as the mAh rating ... Batteries with low internal resistance waste less energy and capacity on self-heating during rapid discharge and recharge ... Low self-discharge NiMH batteries typically have significantly less internal resistance than traditional NiMH batteries ...
Internal Resistance - Batteries
... can be approximately modeled as a voltage source in series with a resistance ... Internal resistance of a battery is dependent on the specific battery's size, chemical properties, age, temperature and the discharge current ... Measurement of the internal resistance of a battery is a guide to its condition, but may not apply at other than the test conditions ...
Apartheid In South Africa - Internal Resistance
... The system of apartheid sparked significant internal resistance ... with police brutality, which in turn increased local support for the armed resistance struggle ... Internal resistance to the apartheid system in South Africa came from several sectors of society and saw the creation of organisations dedicated variously to peaceful protests, passive ...
Current Source - Background
... The internal resistance of an ideal current source is infinite ... When connected to a load resistance, the voltage across the source approaches infinity as the load resistance approaches infinity (an open circuit) ... energy sources exist) and all have a finite internal resistance (none can supply unlimited voltage) ...
Battery Indicator - Batteries Not Part of A System
... A real battery can be modeled as an ideal battery with a specified EMF, in series with an internal resistance ... As a battery discharges, the EMF may drop or the internal resistance increase in many cases the EMF remains more or less constant during most of the ... approximately constant during discharge, but resistance increases, voltage across battery terminals is not a good indicator of capacity ...

Famous quotes containing the words resistance and/or internal:

    ... resistance to tyranny is man’s highest ideal.
    Emma Goldman (1869–1940)

    Even if fathers are more benignly helpful, and even if they spend time with us teaching us what they know, rarely do they tell us what they feel. They stand apart emotionally: strong perhaps, maybe caring in a nonverbal, implicit way; but their internal world remains mysterious, unseen, “What are they really like?” we ask ourselves. “What do they feel about us, about the world, about themselves?”
    Augustus Y. Napier (20th century)