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Lecture 5
Lecture 5

... To measure voltage, we use a two-terminal device called a voltmeter. To measure current, we use a two-terminal device called a ammeter. To measure resistance, we use a two-terminal device called a ohmmeter. A multimeter can be setup to function as any of these three devices. In lab, you use a DMM to ...
2 marks - crypt
2 marks - crypt

... The reading would go down because it has too much current in it. Incorrect, the voltmeter reading rises so no mark. The low resistance leads to low PD across the variable resistor so higher PD across the lamp ( total still = 12v) (2 marks) f) If the 12v battery were replaced by a 9v battery, what wo ...
SIMULATIONS WITH THE BUCK-BOOST TOPOLOGY EE562: POWER ELECTRONICS I COLORADO STATE UNIVERSITY
SIMULATIONS WITH THE BUCK-BOOST TOPOLOGY EE562: POWER ELECTRONICS I COLORADO STATE UNIVERSITY

Document
Document

... (12)in RH table no of sign changes of the first row will indicate_ _ _ ( no of roots with +ve co-efficient) (13) one fn in S-domain was given asked to find-out the final value_ _ _ ( Ans: multiply the fn with 'S' and replace the value of s=0)) (14) Steady st and transient values of the fn v/R [1 - ( ...
DC Voltage and Current Sources
DC Voltage and Current Sources

... specify the gate-source voltage VGS in order to select the desired current level for a MOSFET ( specifiy VBE exactly for a BJT) how do we generate a precise voltage? ... we use a current source to set the current in a “diode-connected” MOSFET ...
Regatron Power Supplies 32 kW / 600 VDC / 66 A - Schulz
Regatron Power Supplies 32 kW / 600 VDC / 66 A - Schulz

LM7905
LM7905

... intended to be functional, but do not guarantee Specific Performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. Note 2: Refer to Typical Performance Characteristics and Design Considerations for details. Note 3: Regulation is measured at a constant ...
Practical 1 RC Circuits Objectives
Practical 1 RC Circuits Objectives

... battery. As the charge on the plates builds up, this back-voltage increases, opposing the action of the battery. As a consequence, the current flowing in the circuit decays, falling to zero when the back-voltage is exactly equal and opposite to the battery voltage. If we quickly remove the wires wi ...
Experiment 9: Driven RLC Circuits
Experiment 9: Driven RLC Circuits

Generator System Considerations
Generator System Considerations

... Superior Efficiency and Durability Used with high power ratings Prime power applications Dirty enviroments High non linear loads Disadvantage: Usually Impractical in smaller Generators ...
Generated Voltage and Electromagnetic Torque
Generated Voltage and Electromagnetic Torque

Lab #3(Word Format)
Lab #3(Word Format)

... A photocell (photoresistor) is a resistor that is sensitive to the amount of light it receives. The dark resistance may be several hundred k, while the light resistance is a few k or lower. This sensitivity to light makes a photocell ideal for many practical applications, including a photosensitiv ...
Murata`s High-Speed DC/DC Converter Tames Fast Load Transient
Murata`s High-Speed DC/DC Converter Tames Fast Load Transient

Dependent Sources
Dependent Sources

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ILSCOPedia \ Electrical Industry Terminology
ILSCOPedia \ Electrical Industry Terminology

2SD2700
2SD2700

... The products listed in this document are designed to be used with ordinary electronic equipment or devices (such as audio visual equipment, office-automation equipment, communications devices, electrical appliances and electronic toys). Should you intend to use these products with equipment or devic ...
psaa electromotive force worksheet
psaa electromotive force worksheet

... On some devices, resistance is lowered as the temperature is increased. These devices are called thermistors or surgistors. Thermistors are used to control current and also as temperature sensors. Surgistors are used to prevent a large current in a device when it is first turned on. Surgistors are o ...
SDB628 固定频率,电流模式升压变换IC
SDB628 固定频率,电流模式升压变换IC

General Purpose Precision Surface Mount Resistors
General Purpose Precision Surface Mount Resistors

... All parts are Pb-free and comply with EU Directive 2011/65/EU (RoHS2) ...
Film capacitors - PowerFactor Correction - MMI7000
Film capacitors - PowerFactor Correction - MMI7000

... rule, EPCOS is either unfamiliar with individual customer applications or less familiar with them than the customers themselves. For these reasons, it is always ultimately incumbent on the customer to check and decide whether an EPCOS product with the properties described in the product specificatio ...
2STW4468
2STW4468

... STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com ...
MJD361T4-A
MJD361T4-A

... IC = 200 mA ...
Equivalent Resistance
Equivalent Resistance

... constant Req is called “the equivalent resistance of circuit R as seen looking into the terminals ab”. This is frequently shortened to “the equivalent resistance of Circuit R” or “the resistance seen looking into a-b”. In some contexts, Req is called the input resistance, the output resistance or th ...
App Note 502 - Calculating AC Line Current - TDK
App Note 502 - Calculating AC Line Current - TDK

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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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