Home » Archimedes archive » Archimedes World » AW-1996-07.adf » !Ignotum_Ignotum » !Ignotum/Formulae/Elec
!Ignotum/Formulae/Elec
This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.
Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.
| Tape/disk: | Home » Archimedes archive » Archimedes World » AW-1996-07.adf » !Ignotum_Ignotum |
| Filename: | !Ignotum/Formulae/Elec |
| Read OK: | ✔ |
| File size: | 05A8 bytes |
| Load address: | 0000 |
| Exec address: | 0000 |
File contents
# Physics > Electricity V=IR Where: V=voltage (V) I=current (A) R=resistance (Ohms) I=AvnQ Where: I=current, A=area v=velocity of charged carriers n=charged carrier density Q=charge R=rl/A Where: R=resistance (Ohms) r=resistivity for material l=length of material A=cross sectional area of material R=R1+R2+R3... Where: R=total resistance R1, R2, R3... are resistors in series 1/R=(1/R1)+(1/R2)+(1/R3)... Where: R=total resistance R1, R2, R3... are resistors in parallel Q=It Where: Q=charge (C) I=current (A) t=time (s) V=E/Q Where: V=voltage (V) E=energy (J) Q=charge (C) E=ItV Where: E=electrical energy (J) I=current (A) t=time (s) V=voltage (V) P=E/t Where: P=power (W) E=energy (J) t=time (s) P=VI Where: P=power (W) V=voltage (V) I=current (A) C=Q/V Where: C=capacitance of a capacitor (F) Q=charge (C) V=voltage (V) E=�QV Where: E=energy stored in a capacitor (J) Q=charge (C) V=voltage (V) 1/C=(1/C1)+(1/C2)+(1/C3)... Where: C=total capacitance (F) C1, C2, C3... are capacitors in series C=C1+C2+C3... Where: C=total capacitance (F) C1, C2, C3... are capacitors in parallel Q=Q0e^(-t/RC) In the discharge of a capacitor: Q=charge (C) Q0=initial charge t=time (s), e=2.718... RC=resistance�capacitance=time constant C=e0erA/d For a parallel plate capacitor: C=capacitance (F) e0=permittivity of free space er=relative permittivity A=plate area, d=distance between plates
00000000 23 20 50 68 79 73 69 63 73 20 3e 20 45 6c 65 63 |# Physics > Elec| 00000010 74 72 69 63 69 74 79 0a 56 3d 49 52 0a 57 68 65 |tricity.V=IR.Whe| 00000020 72 65 3a 0a 56 3d 76 6f 6c 74 61 67 65 20 28 56 |re:.V=voltage (V| 00000030 29 0a 49 3d 63 75 72 72 65 6e 74 20 28 41 29 0a |).I=current (A).| 00000040 52 3d 72 65 73 69 73 74 61 6e 63 65 20 28 4f 68 |R=resistance (Oh| 00000050 6d 73 29 0a 0a 49 3d 41 76 6e 51 0a 57 68 65 72 |ms)..I=AvnQ.Wher| 00000060 65 3a 0a 49 3d 63 75 72 72 65 6e 74 2c 20 41 3d |e:.I=current, A=| 00000070 61 72 65 61 0a 76 3d 76 65 6c 6f 63 69 74 79 20 |area.v=velocity | 00000080 6f 66 20 63 68 61 72 67 65 64 20 63 61 72 72 69 |of charged carri| 00000090 65 72 73 0a 6e 3d 63 68 61 72 67 65 64 20 63 61 |ers.n=charged ca| 000000a0 72 72 69 65 72 20 64 65 6e 73 69 74 79 0a 51 3d |rrier density.Q=| 000000b0 63 68 61 72 67 65 0a 52 3d 72 6c 2f 41 0a 57 68 |charge.R=rl/A.Wh| 000000c0 65 72 65 3a 0a 52 3d 72 65 73 69 73 74 61 6e 63 |ere:.R=resistanc| 000000d0 65 20 28 4f 68 6d 73 29 0a 72 3d 72 65 73 69 73 |e (Ohms).r=resis| 000000e0 74 69 76 69 74 79 20 66 6f 72 20 6d 61 74 65 72 |tivity for mater| 000000f0 69 61 6c 0a 6c 3d 6c 65 6e 67 74 68 20 6f 66 20 |ial.l=length of | 00000100 6d 61 74 65 72 69 61 6c 0a 41 3d 63 72 6f 73 73 |material.A=cross| 00000110 20 73 65 63 74 69 6f 6e 61 6c 20 61 72 65 61 20 | sectional area | 00000120 6f 66 20 6d 61 74 65 72 69 61 6c 0a 52 3d 52 31 |of material.R=R1| 00000130 2b 52 32 2b 52 33 2e 2e 2e 0a 57 68 65 72 65 3a |+R2+R3....Where:| 00000140 0a 52 3d 74 6f 74 61 6c 20 72 65 73 69 73 74 61 |.R=total resista| 00000150 6e 63 65 0a 52 31 2c 20 52 32 2c 20 52 33 2e 2e |nce.R1, R2, R3..| 00000160 2e 20 61 72 65 20 72 65 73 69 73 74 6f 72 73 20 |. are resistors | 00000170 69 6e 20 73 65 72 69 65 73 0a 0a 0a 31 2f 52 3d |in series...1/R=| 00000180 28 31 2f 52 31 29 2b 28 31 2f 52 32 29 2b 28 31 |(1/R1)+(1/R2)+(1| 00000190 2f 52 33 29 2e 2e 2e 0a 57 68 65 72 65 3a 0a 52 |/R3)....Where:.R| 000001a0 3d 74 6f 74 61 6c 20 72 65 73 69 73 74 61 6e 63 |=total resistanc| 000001b0 65 0a 52 31 2c 20 52 32 2c 20 52 33 2e 2e 2e 20 |e.R1, R2, R3... | 000001c0 61 72 65 20 72 65 73 69 73 74 6f 72 73 20 69 6e |are resistors in| 000001d0 20 70 61 72 61 6c 6c 65 6c 0a 0a 0a 51 3d 49 74 | parallel...Q=It| 000001e0 0a 57 68 65 72 65 3a 0a 51 3d 63 68 61 72 67 65 |.Where:.Q=charge| 000001f0 20 28 43 29 0a 49 3d 63 75 72 72 65 6e 74 20 28 | (C).I=current (| 00000200 41 29 0a 74 3d 74 69 6d 65 20 28 73 29 0a 0a 56 |A).t=time (s)..V| 00000210 3d 45 2f 51 0a 57 68 65 72 65 3a 0a 56 3d 76 6f |=E/Q.Where:.V=vo| 00000220 6c 74 61 67 65 20 28 56 29 0a 45 3d 65 6e 65 72 |ltage (V).E=ener| 00000230 67 79 20 28 4a 29 0a 51 3d 63 68 61 72 67 65 20 |gy (J).Q=charge | 00000240 28 43 29 0a 0a 45 3d 49 74 56 0a 57 68 65 72 65 |(C)..E=ItV.Where| 00000250 3a 0a 45 3d 65 6c 65 63 74 72 69 63 61 6c 20 65 |:.E=electrical e| 00000260 6e 65 72 67 79 20 28 4a 29 0a 49 3d 63 75 72 72 |nergy (J).I=curr| 00000270 65 6e 74 20 28 41 29 0a 74 3d 74 69 6d 65 20 28 |ent (A).t=time (| 00000280 73 29 0a 56 3d 76 6f 6c 74 61 67 65 20 28 56 29 |s).V=voltage (V)| 00000290 0a 50 3d 45 2f 74 0a 57 68 65 72 65 3a 0a 50 3d |.P=E/t.Where:.P=| 000002a0 70 6f 77 65 72 20 28 57 29 0a 45 3d 65 6e 65 72 |power (W).E=ener| 000002b0 67 79 20 28 4a 29 0a 74 3d 74 69 6d 65 20 28 73 |gy (J).t=time (s| 000002c0 29 0a 0a 50 3d 56 49 0a 57 68 65 72 65 3a 0a 50 |)..P=VI.Where:.P| 000002d0 3d 70 6f 77 65 72 20 28 57 29 0a 56 3d 76 6f 6c |=power (W).V=vol| 000002e0 74 61 67 65 20 28 56 29 0a 49 3d 63 75 72 72 65 |tage (V).I=curre| 000002f0 6e 74 20 28 41 29 0a 0a 43 3d 51 2f 56 0a 57 68 |nt (A)..C=Q/V.Wh| 00000300 65 72 65 3a 0a 43 3d 63 61 70 61 63 69 74 61 6e |ere:.C=capacitan| 00000310 63 65 20 6f 66 20 61 20 63 61 70 61 63 69 74 6f |ce of a capacito| 00000320 72 20 28 46 29 0a 51 3d 63 68 61 72 67 65 20 28 |r (F).Q=charge (| 00000330 43 29 0a 56 3d 76 6f 6c 74 61 67 65 20 28 56 29 |C).V=voltage (V)| 00000340 0a 0a 45 3d bd 51 56 0a 57 68 65 72 65 3a 0a 45 |..E=.QV.Where:.E| 00000350 3d 65 6e 65 72 67 79 20 73 74 6f 72 65 64 20 69 |=energy stored i| 00000360 6e 20 61 20 63 61 70 61 63 69 74 6f 72 20 28 4a |n a capacitor (J| 00000370 29 0a 51 3d 63 68 61 72 67 65 20 28 43 29 0a 56 |).Q=charge (C).V| 00000380 3d 76 6f 6c 74 61 67 65 20 28 56 29 0a 0a 31 2f |=voltage (V)..1/| 00000390 43 3d 28 31 2f 43 31 29 2b 28 31 2f 43 32 29 2b |C=(1/C1)+(1/C2)+| 000003a0 28 31 2f 43 33 29 2e 2e 2e 0a 57 68 65 72 65 3a |(1/C3)....Where:| 000003b0 0a 43 3d 74 6f 74 61 6c 20 63 61 70 61 63 69 74 |.C=total capacit| 000003c0 61 6e 63 65 20 28 46 29 0a 43 31 2c 20 43 32 2c |ance (F).C1, C2,| 000003d0 20 43 33 2e 2e 2e 20 61 72 65 20 63 61 70 61 63 | C3... are capac| 000003e0 69 74 6f 72 73 20 69 6e 20 73 65 72 69 65 73 0a |itors in series.| 000003f0 0a 0a 43 3d 43 31 2b 43 32 2b 43 33 2e 2e 2e 0a |..C=C1+C2+C3....| 00000400 57 68 65 72 65 3a 0a 43 3d 74 6f 74 61 6c 20 63 |Where:.C=total c| 00000410 61 70 61 63 69 74 61 6e 63 65 20 28 46 29 0a 43 |apacitance (F).C| 00000420 31 2c 20 43 32 2c 20 43 33 2e 2e 2e 20 61 72 65 |1, C2, C3... are| 00000430 20 63 61 70 61 63 69 74 6f 72 73 20 69 6e 20 70 | capacitors in p| 00000440 61 72 61 6c 6c 65 6c 0a 0a 0a 51 3d 51 30 65 5e |arallel...Q=Q0e^| 00000450 28 2d 74 2f 52 43 29 0a 49 6e 20 74 68 65 20 64 |(-t/RC).In the d| 00000460 69 73 63 68 61 72 67 65 20 6f 66 20 61 20 63 61 |ischarge of a ca| 00000470 70 61 63 69 74 6f 72 3a 0a 51 3d 63 68 61 72 67 |pacitor:.Q=charg| 00000480 65 20 28 43 29 0a 51 30 3d 69 6e 69 74 69 61 6c |e (C).Q0=initial| 00000490 20 63 68 61 72 67 65 0a 74 3d 74 69 6d 65 20 28 | charge.t=time (| 000004a0 73 29 2c 20 65 3d 32 2e 37 31 38 2e 2e 2e 0a 52 |s), e=2.718....R| 000004b0 43 3d 72 65 73 69 73 74 61 6e 63 65 d7 63 61 70 |C=resistance.cap| 000004c0 61 63 69 74 61 6e 63 65 3d 74 69 6d 65 20 63 6f |acitance=time co| 000004d0 6e 73 74 61 6e 74 0a 43 3d 65 30 65 72 41 2f 64 |nstant.C=e0erA/d| 000004e0 0a 46 6f 72 20 61 20 70 61 72 61 6c 6c 65 6c 20 |.For a parallel | 000004f0 70 6c 61 74 65 20 63 61 70 61 63 69 74 6f 72 3a |plate capacitor:| 00000500 0a 43 3d 63 61 70 61 63 69 74 61 6e 63 65 20 28 |.C=capacitance (| 00000510 46 29 0a 65 30 3d 70 65 72 6d 69 74 74 69 76 69 |F).e0=permittivi| 00000520 74 79 20 6f 66 20 66 72 65 65 20 73 70 61 63 65 |ty of free space| 00000530 0a 65 72 3d 72 65 6c 61 74 69 76 65 20 70 65 72 |.er=relative per| 00000540 6d 69 74 74 69 76 69 74 79 0a 41 3d 70 6c 61 74 |mittivity.A=plat| 00000550 65 20 61 72 65 61 2c 20 64 3d 64 69 73 74 61 6e |e area, d=distan| 00000560 63 65 20 62 65 74 77 65 65 6e 20 70 6c 61 74 65 |ce between plate| 00000570 73 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a |s...............| 00000580 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a |................| * 000005a0 0a 0a 0a 0a 0a 0a 0a 0a |........| 000005a8
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