entrepreneur and engineer who invented the railway air brake and was a pioneer of the electrical industry They were trying to decide which electricity system‚ either direct current (DC) or alternating current (AC)–would become normal. During the War of the Currents‚ Edison was trying to promote the direct-current system (DC)‚ where electrical current would flow progressively in one direction. Tesla and Westinghouse on the other hand promoted the alternating-current system‚ in which the flow of the currents
Premium Thomas Edison Nikola Tesla Electricity
PhD CHM 151; CRN 25017 1 March 2013 Tesla vs. Edison Everyone knows who Thomas Edison is‚ and many attribute the “invention of electricity” to Edison‚ but this is simply not accurate. The truth is‚ while Thomas Edison did patent and market DC‚ or direct current‚ electricity‚ he did not “invent” electricity‚ and as a matter of fact‚ much of his work was actually basically stolen from other scientists‚ among them‚ one brilliant scientist‚ Nikola Tesla. We are all taught about Edison in school
Premium Alternating current Electricity Nikola Tesla
Questions 1. A CONVENIENCE STORE CHAIN ATTEMPTS TO BE RESPONSIVE AND PROVIDE CUSTOMERS WHAT THEY NEED‚ WHEN THEY NEED IT‚ WHERE THEY NEED IT. WHAT ARE SOME DIFFERENT WAYS THAT A CONVENIENCE STORE SUPPLY CHAIN CAN BE RESPONSIVE? WHAT ARE SOME RISKS IN EACH CASE? As responsiveness increases‚ the convenience store chain is exposed to greater uncertainty. A convenience store chain can improve responsiveness to this uncertainty using one of the following strategies‚ especially for fresh and fast foods:
Premium Supply chain management Convenience store
with either of two sources: Source A: Source B: 3 A DC 6 A r.m.s f = 50 Hz The rotor is locked at θ = 50°. What is the torque developed for the following source connections: (i) (ii) Source A to both windings Source A to the rotor and source B to the stator. Rotor axis [6 marks] [7 marks] θ = 50° (locked) Stator axis Figure Q1(c) SEE 3433 -3Question 2 (a) Briefly explain what do you understand by an armature reaction in a DC machine. What effect does the armature reaction has
Premium Electric motor
BASIC ELECTRONICS MODULE 3 Bipolar Junction Transistor Prepared by H V Balachandra Achar Senior Lecturer‚ Dept. of E&C Engg.‚ M I T‚ Manipal Department of Electronics and Communication Engineering‚ Manipal Institute of Technology‚ Manipal‚ INDIA Syllabus • • • • • • • • Introduction to Bipolar Junction Transistor BJT Operation BJT Configurations Tutorials BJT Biasing Tutorials BJT Amplifier Tutorials Department of Electronics and Communication Engineering‚
Premium Bipolar junction transistor Transistor
produces 25 horsepower‚the KW meter reading will increase by: Ans: 18.65 Kw 5. Which of the following formulas listed is correct for determining the power? Ans: P=(E)(E)/R 6. A magnetic blow out coil in a DC motor controller contactor functions to: Ans: Prevent contact melting 7. The device most commonly utilizing the principle of electromagnetic induction is: Ans: Transformer 8. A current at which a magnetic-type overload
Premium Transformer Electric motor Electrical generator
330R R3 = 1K R4 = 330R R5 = 47R C1 = 100uF-16V C2 = 100nF-63V C3 = 470uF-16V D1 = 1N4007 D2 = Red LED D3 = Green LED Q1 = BC558 Q2 = BC548 IR = TSOP1738 IC1 = CD4017 RL1 = Relay 5V DC Circuit Operation: The 38kHz infrared rays generated by the remote control are received by IR receiver module TSOP1738 of the circuit. Pin 1 of TSOP1738 is connected to ground‚ pin 2 is connected to the power supply through R5 and the output is
Premium Infrared Remote control
care of DCS deserve permanency. Permanency is not just about placement but it is also continuity and stability and knowing that their basic needs will be met while in care. They are often placed in facilities or resource homes that are far from their home community. This requires the youth to be transported whenever there is a court hearing‚ Child and Family Team Meeting‚ medical appointments and visitation with their family. They may also spend a considerable amount of time in the DCS office after
Premium Family Childhood Child
Experiment #7 "Electric Devices and Meters" Physics PHA202 PT2E Santos‚ Nickerson Jeff F. February 27‚ 2002 0001864 Experiment No. 7 Electric Devices And Meters OBJECTIVE: To familiarize the students with the different types of electric devices and meters. FOREWORD: In order to perform experiments dealing with electric circuits‚ you must become familiar first with the devices and meters needed for such experiment. Some of the most common devices and
Premium Electricity Electric current Direct current
Background Whereas some studies have shown clear evidence for an augmentation effect of D-cycloserine (DCS) on exposure therapy for anxiety disorders‚ other studies have shown weak effects or no effect at all. Some preclinical data suggest that the DCS augmentation effect is moderated by the success of extinction learning. Therefore‚ we conducted a reanalysis of existing data to examine whether the effects of DCS on clinical outcome would vary as a function of response to the exposure session (i.e.‚ exposure
Premium Fear Anxiety