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Massachusetts  Institute of Technology
Massachusetts Institute of Technology

... This is written into a function and then the script calls fzero(). The script for this is attached. We find, for NN0 = 1.5 that field current is about .946 amperes and resulting internal voltage is about 236 volts. To get the excitation curve, we repeat this process over a wide range of speeds. The sc ...
Current Electricity (AQA Unit 1)
Current Electricity (AQA Unit 1)

... The current in the two branches will now be different as the branches have different resistances, but the p.d. across each branch will still be 6V in this circuit. The current in the upper branch will be I = V/R = 6/20 = 0.3A and the current in the lower branch will be I = V/R = 6/10 = 0.6A. Fixed r ...
Electronics Questions
Electronics Questions

... 26. Give two practical uses for a variable resistor. 27. The voltage across a lamp is 6 volts when the current in it is 2 amperes. Calculate the resistance of the lamp. 28. Why are hoeshold appliances connected in parallel? 29. What is the value of the mains voltage? 30. Draw the circuit symbol for ...
on/off/0-10 volt dimming room controllers
on/off/0-10 volt dimming room controllers

... system components for the most energy-efficient operation. The room controllers then dim or switch lighting or motor loads in response to input from the communicating devices. When a dimming input is received, the relay switches on when the dimmed level rises above zero, and off when it reaches zero ...
ELEC 350L Electronics I Laboratory Fall 2011
ELEC 350L Electronics I Laboratory Fall 2011

... where the constant A, called the open-loop gain, has a very large value (105 to 108). Although the circuit model shown in Figure 1b does not explicitly indicate it, there is a limit on the range of output voltages that an op-amp can produce. Specifically, the output voltage can be no greater than VP ...
Rule Application:Difference Amplifier
Rule Application:Difference Amplifier

ee2.cust.edu.tw
ee2.cust.edu.tw

STN93003
STN93003

... maintaining the wide RBSOA. The STN93003 is expressly designed for a new solution to be used in compact fluorescent lamps, where it is coupled with the STN83003, its complementary NPN transistor. ...
FJP13009 High Voltage Fast-Switching NPN Power Transistor FJP13009  High V
FJP13009 High Voltage Fast-Switching NPN Power Transistor FJP13009 High V

... 2. A critical component in any component of a life support, device, or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. ...
COMBINING THREE VERY LOW SUPPLY CURRENT ANALOG ICS
COMBINING THREE VERY LOW SUPPLY CURRENT ANALOG ICS

... The TS9001-1’s low input offset voltage (VOS) and low input current (IIN+/-) create a circuit with outstanding input sensitivity while consuming only 0.68µA of supply current. An internal 1.252V reference voltage allows for simple interface and less components for setting the threshold voltage for t ...
docx - Seattle Central College
docx - Seattle Central College

POWER FACTOR METERS LF 72 / LF 96 ANALOGUE METERS
POWER FACTOR METERS LF 72 / LF 96 ANALOGUE METERS

... Digital Multimeters Clamp Meters Insulation Testers SUBJECT TO CHANGE WITHOUT NOTICE This manual superseded all previous versions – please keep for future reference ...
3 V
3 V

... We won’t analyze complex circuits involving many emf’s, resistors, and capacitors in series and parallel. We will look at simple circuits involving a resistor and a capacitor together. Such a circuit is called an RC circuit. (The circuit to the right is the same as the one in Fig. 19-17.) ...
Project Helios
Project Helios

... easy to work with and the cable provides enough individual wires to handle multiple tasks in the same space and it cheap. • RJ45 Connection: ...
RC Circuit Lab
RC Circuit Lab

... 8. Observe the voltage readings on the Galvanometer as the charge flows back. How would you describe the manner in which the voltage falls? 9. Repeat steps 3-5 until you have a good feeling for the process of charging and discharging of a capacitor through a resistance. 10. Now repeat steps 3-6, but ...
Circuits Answer Key
Circuits Answer Key

... The Circuits Gizmo™ shows a circuit board and a variety of components. Create a circuit with a battery, a light switch, a wire, and a light bulb, as shown. (Click the light switch to turn it to OFF.) 1. Click the light switch to turn it to ON. What happens? The light bulb starts to glow. 2. Turn on ...
Solution
Solution

... found by multiplying the complex current (through the inductor) by the complex impedance of the inductor VL (t) = I(t)ZL . Consistent with the given values, the absolute value of this voltage is V0,L = I0 XL = 20 mA · 200 ω = 4 V. Since the phase of the complex impedance of the inductor is 90◦ , th ...
October 2007 - Measure Microamps to Amps or
October 2007 - Measure Microamps to Amps or

... amplify the sense voltage, and no level translation is required. Low side sensing, for all its simplicity, has several inherent problems. First, the sense resistor affects the return voltage on the load—where the return is now the sum of the system’s ground potential and the voltage across the sense ...
Mutual Inductance and Transformers
Mutual Inductance and Transformers

New Low Loss Thyristors for High Power Applications
New Low Loss Thyristors for High Power Applications

... without increased on-state reverse current flow, especially losses. thermal coupling between the within junction termination, is • Silicon thickness is reduced protruding junction termination sufficiently dissipated. compared to existing thyristor, area of FF-assembly with It has already been report ...
2.4.1 RMS Word Document | GCE AS/A
2.4.1 RMS Word Document | GCE AS/A

... The reason for this is that the value of 240V a.c. refers to a voltage called the root mean square (or rms) voltage. The root mean square voltage of an a.c. signal is the value of a sinusoidal a.c. voltage which would provide the same heating effect in a resistor as the equivalent d.c. voltage. So i ...
Special Equipment - newton trasformatori
Special Equipment - newton trasformatori

... Cod. Fisc. e P. IVA 00898060520 capitale sociale 2.000.000,00 i.v. e-mail: [email protected] www.newtontrasformatori.it ...
Programmable shunt voltage reference
Programmable shunt voltage reference

Lab 0: Introduction to Circuits Laboratory
Lab 0: Introduction to Circuits Laboratory

brouchure
brouchure

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Electrical ballast



An electrical ballast is a device intended to limit the amount of current in an electric circuit. A familiar and widely used example is the inductive ballast used in fluorescent lamps, to limit the current through the tube, which would otherwise rise to destructive levels due to the tube's negative resistance characteristic.Ballasts vary in design complexity. They can be as simple as a series resistor or inductor, capacitors, or a combination thereof or as complex as electronic ballasts used with fluorescent lamps and high-intensity discharge lamps.
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