Physics EEI Contents Introduction 4 Astable Multivibrators 4 Overview of the 555 Timer 5 Integrated Circuit 5 Semiconductor material 7 Current and Resistance 9 Potentiometer 10 Calculation of the Voltages 11 Transistors 11 Light Emitting Diode (LED) 14 Capacitance 14 555 Timer Operations 15 Operation in the Astable State 17 Aim, Hypothesis, and Calculations 18 Aim 18 Hypothesis 19 Materials 20 Method 20
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Physics EEI Contents Introduction 4 Astable Multivibrators 4 Overview of the 555 Timer 5 Integrated Circuit 5 Semiconductor material 7 Current and Resistance 9 Potentiometer 10 Calculation of the Voltages 11 Transistors 11 Light Emitting Diode (LED) 14 Capacitance 14 555 Timer Operations 15 Operation in the Astable State 17 Aim, Hypothesis, and Calculations 18 Aim 18 Hypothesis 19 Materials 20 Method 20
Words: 8917 - Pages: 36
wireless charging which can solve problems with short battery life. It would be very useful as the uses of laptops, cell phones (especially smartphone) and other portable devices are increasing rapidly in present and mainly for cordless devices or which has unmanageable wire connections. This technique passes electromagnetic energy to the portable devices when it is placed close to the wireless charger. magnetic field by passing alternating current through it for which there is a voltage induced
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rule and junction rule in a complex circuit. The voltage and current of each of the six resistors in the circuit were measured using a DMM. These values were then used to calculate the resistance of each resistor. The calculated resistor values were compared to the measured DMM values and the nominal values. By doing so, Ohm’s Law was proved because the values were consistent. The second part of the experiment involved using the current and voltage values obtained in part 1 to prove Kirchhoff’s loop
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circuit by interrupting the current. | Circuit Diagram | A diagram which shows a circuit using symbols as components | Battery | A combination of cells. | Resistor | Used to represent any one of many different components. | Load | Converts electrical energy into other forms of energy. | Current | The movement of charge. Measured in Amperes. | Coulomb (C) | Unit of measurement used to measure Charge (Q). | Ampere (A) | Unit of measurement used to measure Current (I). | Ammeter | An instrument
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starting the engine and operating it in a stable manner battery – it serves as a power supply for the electrical parts of the vehicle starting system – system that responsible for the start of the engine charging system – system that generate electricity used in the vehicle and charge the battery ignition system – system to ignite the compressed air-fuel mixture ignition switch – main switch of the ignition Battery: battery – the battery is the primary “Source” of electrical energy of a vehicle
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criteria of choosing of microcontroller? Ans. memory, power consumption, packaging, market availability, speed of operation. 13. H-bridge is used for? Ans. For bidirectional control of DC motor. 14. Damping mechanism used in PMMC is _____? Ans. Eddy current damping. 15. What are the other name of multiplexer and demultiplexer? Ans. Multiplexer: Data selector Demultiplexer: Data Distributer 16. What is ring counter? Ans. Counter based on register. 17. What is the difference between RACE condition and
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The Design and Simulation of Controlled Converter Circuit for Smart Phone Battery Charger at Rated 1.5A and 3.8V load Ban Siong Lee1, Kang Yung Yee1, Yoong Xiang Wong1 1 Faculty of Electrical and Electronics Engineering, Universiti Teknologi Petronas, 31750, Perak, Malaysia leebansiong92@gmail.com, ky.christopher@gmail.com, tikuz92@gmail.com Abstract— There have been increasing demand on low power application over the years, particularly in charging devices for device such as smartphones
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happens to the current through the circuit as time goes on? It slows down from .40 Amps to .00 Amps as time goes on and then stays at 0.00 Amps. c. What happens to the amount of charge on the capacitor as time goes on? It hits a peak and stays the same. d. Now discharge the capacitor by opening the switch on the left and closing the switch on the right. Sketch the graphs of Voltage vs. Time for the resistor and the capacitor below. e. What happens to the current
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t year NATIONAL SENIOR CERTIFICATE GRADE 12 PHYSICAL SCIENCES: PHYSICS (P1) FEBRUARY/MARCH 2013 MARKS: 150 TIME: 3 hours This question paper consists of 15 pages and 3 data sheets. Copyright reserved Please turn over Physical Sciences/P1 2 NSC DBE/Feb.–Mar. 2013 INSTRUCTIONS AND INFORMATION 1. Write your centre number and examination number in the appropriate spaces on the ANSWER BOOK. This question paper consists of TWO sections: SECTION A SECTION B 3. 4. 5. 6. (25)
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