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3 for Another 2 q$="R")+(8 2 q$="I"),18 2 V=I*(R1+R2) 2 ;"AMMETER" 2 ;"AMMETER Reading 2 ;" R R1 R2 2 to End 2 the number: 2 V = ";v;"V 2 Use this to calculate R 2 RESISTANCE: 2 PARALLEL ELEMENTS 2 New Option 2 >>> CURRENT >>> 2 1 = 1 + 1 +.."; 2 R = ";r;" 1 w$=z$+"While each resistor reduces the current in its part of the circuit, the TOTAL RESISTANCE is less and the current increases."+z$ 1 w$=z$+"The Current - I - depends upon the ElectroMotive Force of the cell - V - and the resistance of the circuit - R."+z$ 1 w$=z$+"The CONVENTIONAL CURRENT flows the opposite way - positive (+) to negative (-)."+z$ 1 w$=z$+"If a second cell is joined IN SERIES it will increase the Potential Difference, but it will also increase the total resistance."+z$ 1 w$=z$+"An AMMETER measures the current."+z$ 1 w$=z$+"A second cell doubles the Potential Difference across the circuit. The current is now 3 Amps again."+Z$ 1 w$=z$+"A VOLTMETER measures the Potential Difference between two points."+z$ 1 w$=z$+" With a second lamp in the circuit the resistance is doubled and the current is halved."+z$ 1 c$="I=V/R": 1 a$-an)<.01 1 a$-(r2*r1)/(r2+r1))<.1 1 WRONG AGAIN! HERE'S THE ANSWER. 1 W$=Z$+"The ELECTRON CURRENT flows from negative (-) to positive (+)."+z$ 1 W$=Z$+"Joining two cells IN PARALLEL does NOT increase the Potential Difference, but the total resistance is less."+z$ 1 W$=Z$+"If a second resistor, or any other element with a resistance, is joined IN SERIES then the total resistance increases."+z$ 1 W$=Z$+"Cells have an internal resistance. This must be included in any calculations."+z$ 1 Total Resistance 1 TRANSISTORS 1 SEMI-CONDUCTORS 1 S$(N),S(N): 1 PRODUCTS/CONTRACT BOOKS 1 No current can flow now. 1 It is ""N"" (NEGATIVE) material. 1 I = V/R =(3+3)/6 =1A 1 I = V/R = 3/5 =0.6A 1 I = V/R = 3/3 = 1 A 1 Circuits 1 CIRCUITS f 1 CIRCUIT TESTING 1 C$="V=I*R" 1 C$="R=V/I" 1 A$="PHYSICS": 1 A$="CIRCUITS": 1 ;Z$;Z$;Z$; 1 ;;" ";q$;" = ";an;p$;" ": 1 ;"to opposite ends." 1 ;"the 'holes' and electrons move"; 1 ;"one way only. This is how they"; 1 ;"made from GERMANIUM or SILICON." 1 ;"leaving new holes behind them." 1 ;"have few free Electrons ( 1 ;"changes their conductivity." 1 ;"can flow across the junction." 1 ;"can convert AC current to DC." 1 ;"and few 'positive holes' ( 1 ;"and a charge can again flow."; 1 ;"When no current flows via the"'" BASE, none can flow between" 1 ;"VOLTMETER Reading ";v;" V" 1 ;"VOLTMETER Reading 6 V." 1 ;"This is now a normal conductor."; 1 ;"They are poor conductors. They"; 1 ;"The transistor here is of the"'" 1 ;"SEMI-CONDUCTORS are usually"; 1 ;"RESISTOR" 1 ;"R = ";r;" " 1 ;"R ";r1; 1 ;"R ";r1*r2; 1 ;"LONGMAN SOFTWARE 1 ;"It is the electrons that move-"; 1 ;"If the power supply is 1 ;"If the battery is connected"; 1 ;"INDIUM creates more 'holes'"; 1 ;"EMITTER"; 1 ;"DIODES allow current to flow "; 1 ;"COLLECTOR"; 1 ;"Arsenic frees more electrons."; 1 ;"Adding certain impurities"; 1 ;"AMMETER Reading 3 Amps" 1 ;"AMMETER Reading 1 ;"1 = 1 + 1 = ?"; 1 ;"1 = ";r2;" +"; 1 ;" R 2 2 1 1 ;" ";q$;" = ";an;p$;" ": 1 ;" " 1 ,'holes' and electrons"; 1 (((r2*r1)/(r2+r1))*10 1 "DOUBLE WIDTH" 1 "DOUBLE HEIGHT" 1 "Circuits" 1 "CIRCUITS" 1 ""P"" material 1 ""N"" material 1 " COLLECTOR & EMITTER,but a small"'" current from the BASE causes a "'" much larger current to flow"'" across the transistor." 1 types work in the"'" same way,but the current flows"'" in the opposite directions." 1 type."''" The 1 to watch it work Press 1 to go on 1 to end the section 1 the value for ";q$;" 1 is made from"; 1 What is the total resistance ? 1 WRONG AGAIN! LOOK AND SEE 1 VERY GOOD. LIKE ANOTHER ? 1 V=3 volts 1 Use the equation I=V/R 1 Use ";c$;" to calculate. 1 TO SELECT 1 SERIES ELEMENTS 1 SEMI-CONDUCTORS 1 RESISTOR 2 = ";R2;" 1 RESISTOR 1 = ";R1;" 1 RESISTANCE: TEST 1 1 RESISTANCE 1 RESISTANCE 1 R=1 ohms 1 R = R1+R2+... 1 Pass on to Parallel Elements 1 PROGRAM READY - PRESS ANY KEY 1 PROGRAM OPTIONS 1 PLEASE STOP THE TAPE AND WAIT ": 1 Like to test your resistance? Press 1 I = ";i;"A 1 Hold down 1 END OF PROGRAM 1 END OF PROGRAM 1 E.M.F. of cell 1 Current 1 Circuit Test 1 CIRCUITS 1 A NUMBER 1 <<< CURRENT <<< 1 1984 MERCURIAN PULP 1 1 = 1 + 1 = 1"; 1 ""P"" (POSITIVE) material. 1 What does the Ammeter read? 1 VERY GOOD. LIKE ANOTHER? 1 I = ";i;"A 1 Another Option ? 1 ONE MOMENT PLEASE 1 Press 1 CELL ": 1 SEARCHING AND LOADING 1 "; 1 PLEASE WAIT " 1 A 1