By ACI Committee 345
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Extra resources for ACI 345R-11: Guide for Concrete Highway Bridge Deck Construction
Calculate (i) Internal resistance of the voltage source ( Rs ). (ii) No-load voltage (open circuit voltage Vs ). (iii) The voltage Regulation. 1) ( VL = Vs − I L Rs ) one can write the following expressions under different loading conditions. 8 Rs → solving these equations we get, Vs = 60 V & Rs = 25 Ω . 17. An ideal current source, which is represented by a model in fig. , independent of the voltage across its terminals across the terminals). Version 2 EE IIT, Kharagpur It can be noted from model of the current source that the current flowing from the source to the load is always constant for any load resistance (see fig.
The open-circuit voltage is also called the “no-load” voltage, Voc . The maximum allowable load current (rated current) is known as full-load current I Fl and the corresponding source or load terminal voltage is known as “full-load” voltage VFL . We know that the source terminal voltage varies as the load is varied and this is due to internal voltage drop inside the source. The percentage change in source terminal voltage from no-load to full-load current is termed the “voltage regulation” of the source.
One can write KVL law around the closed-loop D-E-A-B-C-D as VED + VAE + VBA + VCB + VDC = 0 −50 + 100 − V1 + 35 − 50 = 0 ⇒ V1 = 35 volt. Now we have VED = −50 volt , VAD = − 50 + 100 = 50 volt ,VBD = 50 − 35 = 15 volt , VCD = 15 + 35 = 50 volt. 4 Meaning of Circuit referenced to Ground Ground and the Voltages In electric or electronic circuits, usually maintain a reference voltage that is named “ground voltage” to which all voltages are referred. This reference voltage is thus at ground potential or zero potential and each other terminal voltage is measured with respect to ground potential, some terminals in the circuit will have voltages above it (positive) and some terminals in the circuit will have voltages below it (negative) or in other words, some potential above or below ground potential or zero potential.