Resistance to electrical current created by reactance and ohmic resistance.
is just resistance. The redundant "internal" is often added when one is referring to something like a battery or an instrument. symbol for joule, the SI unit of energy.
The quotient of the change of voltage of a cell or battery to the corresponding change of currentunder specified conditions. Alternating current(AC) and direct current(DC) measurment methods lead to very different values. The AC internal resistance is usually measured at 1000 Hz.
Resistance within a cell or battery to the flow of electric current, measured by the ratio of the change in voltage to a specified change in current for a short period of time.
(ri) Resistance along the length of the inside of a neuron or axon
Opposition to direct current flow within a battery, with the battery as source, causing a drop in closed-circuit voltage proportional to the current drain from the battery.
The opposition or resistance to the flow of a direct electric current within a cell or battery; the sum of the ionic and electronic resistance of the cell components. Its value may vary with the current, state-of-charge, temperature, and age. With an extremely heavy load, such as an engine starter, the cell voltage may drop to approximately 1.6. This voltage drop is due to the internal resistance of the cell. A cell that is partly discharged has a higher internal resistance than a fully charged cell, hence it will have a greater voltage drop under the same load. This internal resistance is due to the accumulation of lead sulfate on the plates. The lead sulfate reduces the amount of active material exposed to the electrolyte, hence it deters the chemical action and interferes with the current flow.
Inherent resistance of a source of emf
The opposition exhibited by a circuit element to the flow of direct current (d.c.). In a cell, the internal resistance is the sum of the ionic and electronic resistances of the cell components.
The resistance to the flow of an electric current within the cell or battery.
Every source has some resistance in series with the output current. When current is drawn from the source some power is lost due to the voltage drop across the internal resistance. Usually called output impedance or output resistance.