BASIC ELECTRICAL CIRCUITS

ARMY MEDICAL DEPARTMENT CENTER AND SCHOOL SAM HOUSTON TEXAS 78234 6100 ELECTRICAL MD0903 100 subcourse is approved for resident and correspondence course instruction It the current thought of the Academy of Health Sciences and conforms to printed of the Army doctrine as closely as currently possible Development and render such doctrine continuously subject to change MCCS HSN 11TH STREET SUITE 4192 SAM HOUSTON TX 78234 5064 comments or questions regarding enrollment student records or shipments the Nonresident Instruction Branch at DSN 471 5877 commercial 210 221 toll free 1 800 344 2380 fax 210 221 4012 or DSN 471 4012 e mail or write to students whose enrollments remain in good standing may apply to the Instruction Branch for subsequent courses by telephone letter or e mail sure your social security number is on all correspondence sent to the Academy of Sciences OF TRAINING LITERATURE TERMINOLOGY used in this publication words such as he him his and men are intended include both the masculine and feminine genders unless specifically stated otherwise when obvious in context OF CONTENTS INTRODUCTION 1 BASIC ELECTRICAL CIRCUITS 1 i COURSE OF US ARMY MEDICAL DEPARTMENT CENTER AND SCHOOL MDO903 ELECTRICAL CIRCUITS subcourse is designed to give you a basic knowledge of simple circuits carry electricity from a power source to some kind of electrical equipment With a of these fundamentals you will be able to make better use of electrical and to better understand future textual materials that mention electrical in the function of equipment Components subcourse consists of programmed text 1 Basic Electrical Circuits the subcourse lesson and study each lesson carefully receive credit hours you must be officially enrolled and complete an are some suggestions that may be helpful to you in completing this Suggestions Awarded furnished by the Nonresident Instruction Branch at Fort Sam Houston Upon successful completion of the examination for this subcourse you will be 3 credit hours Development School Code 555 Instruction Section is found in Chapter 4 of DA Pamphlet 350 59 Army Course Program Catalog The DA PAM is available at the following http www usapa army mil pdffiles p350 59 pdf can enroll by going to the web site http atrrs army mil and enrolling under listing of correspondence courses and subcourses available through the ii 1 MD0903 Electrical Circuits 1 through 100 completing the programmed text you should be to choose correct answers to questions about electrical circuits current resistance amperes and equivalent text is set up differently from most subcourses is a workbook that utilizes programmed instruction numbered frames present information and or question about presented information You should through the frames in the order presented each question that is presented To check answers go to the shaded box of the NEXT For example the solution to the question in Frame 2 is found in the shaded box of 3 Subcourse MD0902 Basic Electricity before this subourse going through the programmed text at a relatively pace go back through it several times as rapidly you can This will not take long and will help you more knowledgeable as you study The purpose of programmed text is memorization as well as 1 diagram below will help you to recall that current is a of through a conductor 2 are several series circuits Study the carefully to Frame 1 a series circuit there is only one are more than one path the current to flow 3 above is a series circuit because 4 each circuit as either or Series a b c d to Frame 2 only one to Frame 3 has only one path for to flow 5 would be the reading on the ammeter in the series below E R 6 matter where you measure the current in the series below the current readings would all be the to Frame 4 Series Not Series Not Series Series to Frame 5 6 amp 2 7 any part of a series circuit the current is the long as the circuit is not changed 8 in the current reading of each ammeter connected in series circuit below to Frame 6 6 amp to Frame 7 a b 9 any series circuit the total resistance Rt is the sum or of all the single resistances In the series circuit below is the of R1 and R2 to Frame 8 1 amp 1 amp 10 The total resistance Rt in the series circuit below is 10 40 Total resistance Rt is ohms to Frame 9 or total to Frame 10 5 55 11 the series circuit below total resistance Rt is 12 far you have learned that in series circuits There is only one more than one path for the current to flow Current has the same value different values everywhere in the circuit To get Rt total resistance we add subtract multiply all the individual resistances 13 find It current in any series circuit you must use Rt in formula It Et Rt find It in the circuit above you must use in the 14 find I in the series circuit below you must use in the formula It Et Rt to Frame 11 3 2 5 10 20 to Frame 12 only one the same value add to Frame 13 Et Rt 15 a series circuit with only one resistor R1 and Rt must be same In the series circuit below there is only one This means the R1 and Rt are are not the same are both equal to to Frame 14 16 find the current in the circuit below you would substitute number 4 6 10 24 for Rt in the formula It Et Rt 17 the circuit below Et Rt the current It to Frame 15 ohms to Frame 16 18 you calculated current I in the circuit below and used this Et your answer would be right wrong RI Et your answer would be right wrong R2 Et your answer would be right wrong Rt to Frame 17 amp Et 90v 3 amp Rt