FII-ELECTRICAL‚ELECTRONIC AND CONTROL ENGINEERING 01FII-C2A-S04 1. An electrical component is connected across a 120 volt‚60Hz‚AC supply.What is the current drawn by the component if the impedance is 200 ohms? Ans: 0.060 Amperes 2. A lamp has a source voltage of 110 volts and a current of 0.9 amps. What is the resistance of the lamp? Ans: 122.22 Ohms 3. What power would be consumed in each of the branch resistors of the circuit
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the intensity of the beam and is expressed in mR/mAs‚ and the right quality of x-ray beam‚ which refers to the penetrability and is expressed in kVp . There are four different things that need to be controlled by the control console‚ the Line Compensation‚ kVp‚ mA and exposure time. Also controlled by the control console are meters to monitor kVp‚ mA and exposure time. Some consoles will also provide a meter for mAs. All
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engineers dealing with three-phase ac–dc converters. A classified list of around 450 research articles on IPQCs is also appended for a quick reference. Index Terms—Harmonic reduction‚ improved power quality‚ power-factor correction‚ switch-mode rectifiers‚ three-phase ac–dc converters. I. INTRODUCTION T HREE-PHASE ac–dc conversion of electric power is widely employed in adjustable-speeds drive (ASDs)‚ uninterruptible power supplies (UPSs)‚ HVdc systems‚ and utility interfaces with nonconventional
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Conductors and Insulators of Electricity A major reason electricity works is because of conductors. First metal‚ water‚ tall trees and tall items are good conductors because lightning is attracted to them. These materials have many mobile electrons. Metal is an easy substance for lightning to travel through so metals are good conductors. However‚ rubber is a bad conductor because lightning bounces off of it. A bad conductor is called an insulator. An insulator has a few mobile electrons. It is
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electronic applications. These are called insulators. There is another category of materials whose ability to carry current‚ called conductivity‚ lies between that of conductor and insulators. Such materials are known as semi conductors. Germanium and silicon are two well-known semiconductors. 1.2 Atoms and elements Ordinary matter is made up of protons‚ neutrons‚ and electrons and is composed of atoms. An atom consists of a tiny nucleus made up of protons and neutrons‚ on the order of 20‚000
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1. Advantages of photodiode: Select one: a. It is Very small b. Voltage generating characteristic c. It has fast time response d. It has slow response 2. Advantages of PLCs than Hard wired Relay: Select one: a. easily programmable b. Highly reliable c. None of these d. both Highly reliable and easily programmable 3. Approximately 400nm to 760 nm range is for Select one: a. Visible light band b. Far Infrared c. Ultraviolet d. Microwave 4. Discrete state process control
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materials that are used to make N-type semiconductor more negative. 7. Give three examples of impurity materials that are used to make P-type semiconductor more positive. 8. What is the repelling force of the barrier voltage in the germanium and silicon semiconductor? 9. What are the two current carriers of diode? 10. Define diode. II. Testing Diode (5 pts each) 1. Write how to test Good Diode with your ohmmeter. 2. Write how to test Shorted Diode with your ohmmeter. 3. Write how
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1 CHARACTERISTICS AND OTHER DIODE APPLICATIONS AIM:-To observe and draw the Forward and Reverse bias V-I Characteristics of a P-N Junction diode and diode applications . APPARATUS:P-N Diode 1N914 Regulated Power supply (0-30v) Resistor 1KΩ Ammeters (0-200 mA‚ Voltmeter (0-2V/200 V) Bread board Connecting wires THEORY:A p-n junction diode conducts only in one direction. The V-I characteristics of the diode are curve between voltage across the diode and current through the diode. When external
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Chhattisgarh Swami Vivekanand Technical University‚ Bhilai SCHEME OF TEACHING AND EXAMINATION BE (ELECTRICAL ENGINEERING) III Semester Sl.No. Board of Studies Subject Subject Code Periods per week L T P Scheme of Exam Theory/Practical ESE CT TA Total Credit L+(T+P) /2 Marks Appl. Mathematics 324351(14) Mathematics III 3 1 80 20 20 120 4 2 Electrical Engg. 324352(24) Electrical Machines -I 4 1 80 20 20 120
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(kay rap)DEFINITION OF TERMS AC (alternating current) - In electricity‚ alternating current (AC) occurs when charge carriers in a conductor or semiconductor periodically reverse their direction of movement. Household utility current in most countries is AC with a frequency of 60 hertz (60 complete cycles per second)‚ although in some countries it is 50 Hz. The radio-frequency (RF) current in antennas and transmission lines is another example of AC. The usual waveform of an AC power circuit is a sine
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