supply was used to power the entire system. Direct and alternating current flow in this circuit. The direct current is brought about by the 9V DC battery while the alternating current generator is the carbon microphone. Salgat (2007) stated that capacitors do not allow direct current through them. Hence the DC equivalent of FIG. 3.1 is as shown in FIG 3.2 and FIG 3.3. R1 Q1 R2 FIG 3.2 Ic IB 0.7v BfIB R1 9V R2 FIG 3.3 Now for the forward active mode‚ VBE=0.7V‚ choosing
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with a wavelength of 3.3 to 10 cm. So a circuit detecting gigahertz signals is required for a mobile bug. Here the circuit uses a 0.22μF disk capacitor (C3) to capture the RF signals from the mobile phone. The lead length of the capacitor is fixed as 18 mm with a spacing of 8 mm between the leads to get the desired frequency. The disk capacitor along with the leads acts as a small gigahertz loop antenna to
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required. This can be done by increasing or decreasing the number of level detector metal strips (L1 through L12) and their associated components. In the circuit‚ diodes D1‚ D2 and D13 form half-wave rectifiers. The rectified output is filtered using capacitors C1 through C3 respectively. Initially‚ when water level is below strip L1‚ the mains supply frequency oscillations are not transferred to diode D1. Thus its output is low and LED1 does not glow. Also‚ since base voltage of transister T1 is low‚
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3001 MULTIPLE CHOICE QUESTIONS in ELECTRONICS ENGINEERING Santos S. Cuervo‚ ECE Susana A. Tan‚ ECE Encoded by: ASI‚ Rannilo Jr. L. DAMIAN‚ Sarah Joy V. DIAZ‚ Chona O. GLORIA‚ Mac Arco J. TAJANLANGIT‚ Alvin L. TORIO‚ Ayra Kate E. UMBAO‚ Raissa Grace C. PART 1: COMPILED QUESTIONS PER TOPIC CHAPTER 1: ELECTRICITY AND MAGNETISM FUNDAMENTALS 1. Who discovered the relationship between magnetism and electricity that serves as the foundation for the theory of electromagnetism
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Single phase induction motor‚ phase control‚ triac‚ microcontroller 1. Introduction A single phase induction motor is the most common AC motor. In all single phase induction motor‚ the rotor is made of a squirrel cage type [2]. Permanent split capacitor (PSC) typed motor is one that is categorized under the single phase induction motors. It consists of three main parts which are the main winding in the stator‚ rotor and
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10 Low Pass and High Pass Filters Objective To study the behavior of RC and RL circuits when they are connected to AC power supply. Material Function generator‚ resistor‚ capacitor‚ inductor‚ wires‚ breadboard‚ oscilloscope Procedure RC Low Pass Filter We use a 10KΩ resistor and a 0.01μF capacitor in a series and prepare a function generator and a oscilloscope. Next‚ we measure the each voltage by changing the frequency (Start from 10‚ 20‚30‚50‚70Hz). The measurement repeats
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The case st udy of A ut omot i ve Ai r bag Reli abil it y (Page 252) (for comprehensive hints to solve the case study‚ refer to Page 217-220) Q# 1: What is the role of the dual actuators in the mechanical air bag system? Describe the effect of having only one. * The role of dual actuators is to activate the mechanism of the airbag. * These dual actuators are the two shafts that move off the edge of spring-loaded firing pins where the pins then stab dual primers‚ igniting the enhancer
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FM Modulator and Demodulator Nor Ayu Hidayah Binti Mohd Safri (31743) Department of Electronic Engineering (Computer) Universiti Malaysia Sarawak‚ Malaysia Kuching‚ Sarawak‚ Malaysia Email : nor_ayu92@yahoo.com Abstract This paper presents about FM modulator and Abstractdemodulator.In electronic and telecommunication‚ modulation process of varying one or more properties of a high frequency periodic waveform ‚ called carrier signal with a modulating signal which typically contain information to
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Chapter 1: Technical Measurement and Vector 5. Newton’s law of universal gravitation is represented by [pic] where F is the gravitational force‚ M and m are masses‚ and r is a length. Force has the SI units kg ∙ m/s2. What are the SI units of the proportionality constant G? 8. The speed of light is now defined to be 2.99 7924 58 × 108 m/s. Express the speed of light to (a) three significant figures‚ (b) five significant figures‚ and (c) seven significant figures. 15. A rectangular
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FACTS-based reactive power compensation of wind energy conversion system abstract Voltage control and reactive power compensation in a distribution network with embedded wind energy conversion system (WECS) represent main concern of this paper. The WECS is of a fixed speed/constant frequency type that is equipped with an induction generator driven by an unregulated wind turbine. The problem is viewed from short term (10 seconds) and mid-term (10 minutes) time domain responses of the system
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