Voltage
Meanings and phrases
voltage
- the rate at which energy is drawn from a source that produces a flow of electricity in a circuit; expressed in volts; electromotive force; emf
- the difference in electrical charge between two points in a circuit expressed in volts; electric potential; potential; potential difference; potential drop
n.
- a high-voltage machine in which rectifiers charge capacitors that discharge and drive charged particles through an accelerating tube; Cockcroft and Walton accelerator; Cockcroft-Walton accelerator; Cockcroft-Walton voltage multiplier
n.
- a high-voltage machine in which rectifiers charge capacitors that discharge and drive charged particles through an accelerating tube; Cockcroft and Walton accelerator; Cockcroft-Walton accelerator; Cockcroft and Walton voltage multiplier
n.
- resistors connected in series across a voltage source; used to obtain a desired fraction of the voltage; potential divider
n.
- a decrease in voltage along a conductor through which current is flowing
- The voltage drop due to the lead resistance has been cancelled out.
- At higher currents the forward voltage drop of the diode increases.
- Four-terminal sensing eliminates voltage drop in the measuring leads as a contribution to error.
E.g.
- The oscillator must supply the high voltage and the yoke power.
- Iron-core coils look like oil-filled high voltage transformers.
- The system does not degrade gracefully under high voltage faults.
E.g.
- Depending on the output voltage, the gain of the circuit varied from 1:1 to 1:10.
- A bootstrap capacitor is connected from the supply rail (V+) to the output voltage.
- Op amps scale the output voltage so that it is usable with the rest of the computer.
E.g.
- Wood poles can also be used for low voltage distribution to customers.
- The location makes low voltage (around 12 volt) distribution practical.
- Modern systems are operated with relatively low voltage, usually from 6-12 volts.
E.g.
- The voltage across the loudspeaker terminals is measured and considered proportional to the impedance.
- One such property is the piezoelectric effect, where a voltage across the crystal can shrink or stretch it.
- Changing the DC voltage across the varactor changes its capacitance, which changes the resonant frequency of the tuned circuit.
E.g.
- Typically, as the input voltage increases, progressively more diodes conduct.
- This causes negative feedback, and the output voltage tends to follow the input voltage.
- A non-zero value for "h" means the output voltage affects the input voltage, that is, this amplifier is bilateral.
E.g.
- This is many times greater than household power supply voltage.
- The main difference between the 6581 and the 8580 is the supply voltage.
- The d.c. supply voltage equates to the average, so the tap peaks at approximately (pi/2)*Vcc.
E.g.
- Because lightning bolts vary in voltage and current, a more average calculation would be 10 gigawatts.
- Vizag 2 was built by ABB between 2002 and 2005 and has nominal DC voltage and current ratings of 176 kV, 2841 A.
- Vizag 1 was built by Alstom between 1996 and 1999 and has nominal DC voltage and current ratings of 205 kV, 2475 A.
E.g.
- Typically a lower voltage source, such as a 9–volt battery, is sufficient for the purpose.
- One end of the faulted cable is connected through a pair of resistors to the voltage source.
- Circuits take in a voltage source, and modify them using resistors, capacitors, inductors, and other components.
E.g.
- To achieve the ON condition of the display, a voltage is applied to the transparent electrode.
- A high voltage is applied across the anode and cathode, resulting in an ionization of the fill gas.
- When a voltage is applied to the device, the electrical gradient will be largest across the thin middle layer.