electrical circuits
... • Resistors “resist” the flow of electrons in the circuit. Electrons strike a lot of particles and emit as heat. When electronics get warm, it’s the resistance in the circuit heating up. • Without them, the current would flow uncontrolled and short the circuit. • As resistance gets bigger, current g ...
... • Resistors “resist” the flow of electrons in the circuit. Electrons strike a lot of particles and emit as heat. When electronics get warm, it’s the resistance in the circuit heating up. • Without them, the current would flow uncontrolled and short the circuit. • As resistance gets bigger, current g ...
L5: Maximum Power Transfer Theorem background
... In some circumstances, it is interested to determine the maximum power that can be delivered to a load in a circuit. From this point of view, the circuit consists in a load connected to a dipole, from which the load gets the power. A dipole is a network with two access terminals. Accordingly to Thev ...
... In some circumstances, it is interested to determine the maximum power that can be delivered to a load in a circuit. From this point of view, the circuit consists in a load connected to a dipole, from which the load gets the power. A dipole is a network with two access terminals. Accordingly to Thev ...
Buck-Boost Converter Enables Three Modes of
... external components (see the figure). It employs three basic operating states, depending on the input/output relationship. In boost mode, VIN << VOUT, a standard boost configuration is achieved, leaving switch P1 permanently on, switch N1 permanently off, and switching N2 and P2 in antiphase as norm ...
... external components (see the figure). It employs three basic operating states, depending on the input/output relationship. In boost mode, VIN << VOUT, a standard boost configuration is achieved, leaving switch P1 permanently on, switch N1 permanently off, and switching N2 and P2 in antiphase as norm ...
HP 34401A Multimeter
... capable of measuring numerous circuit characteristics. It is capable of measuring electric characteristics such as: voltage, current, frequency and resistance with very high accuracy. These functions will be the focus of this manual. The following guide is for course-specific applications and not in ...
... capable of measuring numerous circuit characteristics. It is capable of measuring electric characteristics such as: voltage, current, frequency and resistance with very high accuracy. These functions will be the focus of this manual. The following guide is for course-specific applications and not in ...
Review_Exam2_ANS
... After the plates are pulled apart a bit, the electric field between the plates A) increased B) decreased C) remained constant The voltage difference between the plates.. A) increased B) decreased C) remained constant The capacitance .. A) increased B) decreased C) remained constant Answers: The E-fi ...
... After the plates are pulled apart a bit, the electric field between the plates A) increased B) decreased C) remained constant The voltage difference between the plates.. A) increased B) decreased C) remained constant The capacitance .. A) increased B) decreased C) remained constant Answers: The E-fi ...
Name - TeacherWeb
... Activity C (continued from previous page) 6. Extend your thinking: Household appliances are usually connected in a parallel circuit. Why do you think it might be a problem if too many appliances are turned on at once? (Hint: current in a wire also produces heat.) ___________________________________ ...
... Activity C (continued from previous page) 6. Extend your thinking: Household appliances are usually connected in a parallel circuit. Why do you think it might be a problem if too many appliances are turned on at once? (Hint: current in a wire also produces heat.) ___________________________________ ...
Piezotron® Coupler
... excitation required by low impedance, voltage mode sensors with built-in electronics (i.e. Piezotron®, PiezoBeam®, K-Shear®, and Ceramic Shear) or for high impedance sensors with an external impedance converter. Sensor power is supplied by the same 2-wire cable that provides the low impedance output ...
... excitation required by low impedance, voltage mode sensors with built-in electronics (i.e. Piezotron®, PiezoBeam®, K-Shear®, and Ceramic Shear) or for high impedance sensors with an external impedance converter. Sensor power is supplied by the same 2-wire cable that provides the low impedance output ...
AC Series Circuit: Power and Resonance
... for the LRC circuit board last week. Assume the source voltage is 5.0 V. Hint: You should use frequency values which are grouped near resonance as well as some which are more widely spaced when away from the resonance frequency. Apparatus: The same RLC circuit board used last week, audio frequency ...
... for the LRC circuit board last week. Assume the source voltage is 5.0 V. Hint: You should use frequency values which are grouped near resonance as well as some which are more widely spaced when away from the resonance frequency. Apparatus: The same RLC circuit board used last week, audio frequency ...
File
... A PV cell can be modeled by a current source in parallel with a diode, with resistance in series and in parallel. ...
... A PV cell can be modeled by a current source in parallel with a diode, with resistance in series and in parallel. ...
An equivalent resistance is the resistance of a single resistor that
... at all points along the wire. IT = I1 = I2 = I3 - An equivalent resistance is the resistance of a single resistor that could replace all the resistors in a circuit. The single resistor would have the same current through it as the resistors it replaced. RE= R1 + R2 + R3 - In a series circuit, the su ...
... at all points along the wire. IT = I1 = I2 = I3 - An equivalent resistance is the resistance of a single resistor that could replace all the resistors in a circuit. The single resistor would have the same current through it as the resistors it replaced. RE= R1 + R2 + R3 - In a series circuit, the su ...
Resistive opto-isolator
Resistive opto-isolator (RO), also called photoresistive opto-isolator, vactrol (after a genericized trademark introduced by Vactec, Inc. in the 1960s), analog opto-isolator or lamp-coupled photocell, is an optoelectronic device consisting of a source and detector of light, which are optically coupled and electrically isolated from each other. The light source is usually a light-emitting diode (LED), a miniature incandescent lamp, or sometimes a neon lamp, whereas the detector is a semiconductor-based photoresistor made of cadmium selenide (CdSe) or cadmium sulfide (CdS). The source and detector are coupled through a transparent glue or through the air.Electrically, RO is a resistance controlled by the current flowing through the light source. In the dark state, the resistance typically exceeds a few MOhm; when illuminated, it decreases as the inverse of the light intensity. In contrast to the photodiode and phototransistor, the photoresistor can operate in both the AC and DC circuits and have a voltage of several hundred volts across it. The harmonic distortions of the output current by the RO are typically within 0.1% at voltages below 0.5 V.RO is the first and the slowest opto-isolator: its switching time exceeds 1 ms, and for the lamp-based models can reach hundreds of milliseconds. Parasitic capacitance limits the frequency range of the photoresistor by ultrasonic frequencies. Cadmium-based photoresistors exhibit a ""memory effect"": their resistance depends on the illumination history; it also drifts during the illumination and stabilizes within hours, or even weeks for high-sensitivity models. Heating induces irreversible degradation of ROs, whereas cooling to below −25 °C dramatically increases the response time. Therefore, ROs were mostly replaced in the 1970s by the faster and more stable photodiodes and photoresistors. ROs are still used in some sound equipment, guitar amplifiers and analog synthesizers owing to their good electrical isolation, low signal distortion and ease of circuit design.