As soon as knows □lies between □ 1. □□preliminary knowledge □ (1) the nature only has, □□a kind of □Holland. □decides with □□friction □glass rod □□Holland argues □Holland, calls □□Holland with fur friction □oak □stick □□Holland. □the Dutch □mutual function is: Homogeneous □Holland repels one another, heterogeneous □Holland mutually attracts. (2) enable the object □□method to include: Rubs □, the contact □□, the feeling □□. Rubs □: □□the object mutually rubs □, a □object loses partially □sub- □□, another object obtains partially □sub- □□□. Passes □rubs □causes □sub- □to live □moves, causes □□the object with □□on isometric heterogeneous □Holland. Contact □□: □□the object mutually does not contact with □□the object, □the sub- □□□□□object □does not transfer to □□the object, causes □the object all □□□; Or □the sub- □□object □transfers to □the □object, causes □the object all □. Feeling □□: If □8 — 1 shows, moves near □body B □□body A, in □body B □end with □□isometric heterogeneous □Holland. In approaches A an end, left □and on A different □Holland; In □left □and A was photogenic with □Holland to a A end. □center □likely is called □□the feeling □□elephant. Moves in A □before, □B minute □, causes B1 and B2 not mutually contacts, □B1 and B2 minute □□on isometric heterogeneous □Holland. □a □□method is called the feeling □□□. In above each □□method, all is the □□Dutch minute □, but is not □makes □Holland. □Holland already cannot □make, also cannot disappear □, he □only can □a □object □transfer to another one □the object, or □the object moves partially □transfers to moves in addition the part, □is □Holland □the law. (3) if □the object □has and so on □heterogeneous □Holland, after the contact □the object all □□, □the kind □likely is not called and □the elephant. Center and □likely is causes isometric heterogeneous □Holland the function to offset or counteract one another, but is not □Holland is disappeared □, with □observes □Holland □the law. 2. □class (1) forms □flows □: □Holland's direction detection moves □forms □the class, □in the body □lives □flows □is □the body □end existence □□; □flows direction: □the correction □Holland's direction detection moves the direction which □the direction □□flows. (2) □flows □to decide □: Passes □□the body □section □to measure q with to pass □□the t ratio which □□a □quantity uses, is called □flows □, □□□class. With I expression □class, □flows □to decide □the type □; □flows □micro □table □type I=nsve, n expression □position body □□free □Holland □item, the s expression □body □the section □, v expression free □Holland direction detection moves □the average speed, e express free □Holland □□the quantity. 3. □□ (1) □□causes the reason which □in the road forms □flows; □□the size with moves □□Holland □□to flow the acting the size to have □, namely (2) □the source is can provide holds □□flows □sets. □the source work □, is other forms can □□□energy, caused □the source □extremely to divide □gathered □many □□Holland, □lived in □the source □end □□; □□□Holland transfers to in □source □to the positive electrode □extremely, □transfers to the positive electrode to □extremely □Holland, causes □the source □beginning □maintenance to be extremely certain □□. 4. □姆 laws (1) □anti-: □the body □□flows the anti- □function is called □the body anti- □; □anti- decides □the type: . In □□□the position system □the anti- □position is □姆, □□□, Fu? is. (2) □姆 law: □in the body □flows I □□U has the direct ratio with □the body □end, □anti- R has the inverse ratio with □the body. □姆 law table □type □: . (3) □body voltage-current characteristic: □in the body □flows with □□□is □may use □□□the expression, with □□expression □□U, □□the expression □flows I, □U — I □□is called □a body voltage-current characteristic tune □. In Jin?? in the body, □flows with □□has the direct ratio, voltage-current characteristic Qu? is passes □sits originally □□is straight □(for example □8 — 2 to show). □center the straight □slope was equal to □the body □anti- but actually □, □becomes the formula □: Slope: The straight □slope smaller expression □body □anti- is bigger. □center □□the straight □center straight □2 representatives □anti- are big. □8 — 2 (4) □anti- law: □the body □anti- R □L has the direct ratio with it, □the section □has the inverse ratio with it, □is □the anti- law. □anti- law table □type □: The in the formula proportion is □has with □the body material □, is a □reflection material □□performance physical quantity, is called the material anti- □rate. 5. □merit, □power and joule-lenz law (1) □the merit decides □: Merit □□the strength does which in section of □roads, is usual □□flows the merit which does, □□□merit. (2) □the merit □calculated that, □flows merit W which does on section of □roads to be equal to □Duan?lu □end □□U, □in the road □flows I and passes □□□t three rides □. □the merit □calculates the formula □: W=U I t. (3) □the power decides □: On section of □roads □power P, was equal to □Duan?lu □end □□U and □in the road □flows I rides □. □the power decides □the type □: P=UI. (4) □the power and □the power □is and □□: □power P=I 2R, only has □the anti- part in □the road □(namely □□anti- □road), □the power and □the power is equal. □□in the road has □□machine, □the solution trough urgently needs □□, □can have to divide □□turns into the mechanical energy, □can and so on, only some part □turns into □energy, □the power is bigger than □the power. (5) □merit, □merit, □power and joule-lenz law □department: □□anti- □road (□merit rating □type) The formula, commonly used Yu Ping? the □road (□□□), the formula, commonly used Yu Ch'uan? the □road (□does not flow □□). The formula and is only suitable for □□the anti- □road, □Yu Fei? the □anti- □road only can use a joule-lenz law □□to calculate □flows □the fresh □quantity. 6. strings □□roads: One □meets certain □□anti- or □□the part one □□meets □, □the kind □meets the way to be called the string □. (1) in string □□road each □□flows same: . (2) string □□Lu?tuan □□is equal to each □anti- □end □□the sum: . (3) the string □□road □□anti- is equal to each □anti- sum: . (4) in string □□road □□the assignment with □anti- has the direct ratio: . (5) in the string □□road the power assignment with □anti- has the direct ratio: . 7. and □□road: Compound □meets □, □the kind certain □□anti- or □□the part □meets the way to be called and □. (1) and □□road various legs □end □□same: . (2) and □□the road 干路 center □the class was equal to various legs □flow the sum: . (3) and □□Lu?? anti- but actually □is equal to each □anti- but actually □sum: . (4) and □□the road various legs □flow the assignment with □anti- has the inverse ratio: . (5) and □□the road various legs power assignment with □anti- has the inverse ratio: . (6) n □same □anti- R and □, □□anti-; (7) and □□Lu?? anti- is smaller than any leg □anti-; Some leg □anti- □big (other legs □anti- not □), □□anti- must □big, otherwise □is small; And □the leg increases, □□anti- □is small, otherwise increases. 8. □roads □ In duplicate □□road, □□body □string □, and □□gathers □is not □□□, wants □a line of □road □. Needs to pass □□the equivalent □Lu? method □analysis □road. □a method may divide □four step: (1) in the junior middle school □section, is ordinary □□□flows the table □anti- □zero, □□the table □anti- □□limits in a big way. □flows the table □to make □□, □□the table □□□road. (2) three □□□intersects with letter □□Lu?zhong □□. (3) □□the source positive electrode leaves □, according to Lu? and each □□□position □□□□road which □flows □. (4) □flows the table and □□the table replacement. 9. slides □□the anti- □□use: (1) limits the class: With □the control □road in □the class, □the road □meets like □8 — 3 to show, in puts through □in front of the source □transfers to gleitbretter P the B end, causes to turn on □in the road □anti- biggest, □in the road □flows slightly, guarantees □is safe. (2) minute □: With □□□□□(with □) the R2 □end □□, □the road □meets way like □8 — 4 to show, moves □gleitbretter P to be allowed □□to add on □□R2 □□. The general sentiment □under, in puts through □in front of the source □gleitbretter P transfers to the A end, causes □□the R2 □end □□slightly, guarantees □is safe. □8 — 3 □8 — 4 10. □□tables and □flow the table (1) □flows the table (table □): □flows the table (table □) □anti-: □flows the table (table □) □anti- usually is called □flows the table (table □) □anti-. □□class: Refers □□is called to the biggest scale division □□class □flows □□the class. □□□: □flows the table to pass □□□flows □, adds in □flows the table □end □□to call □□□. (2) □flows the table to change □□□the table: □flows the table (table □) □□□and □□flows general □is small, □flows the table to change □Cheng?? the table □to have to string together □minute □□anti- R (for example □8 — 5 to show): □□the table □anti- RV is equal to Rg and the R string □□□□anti-, namely RV =Rg+R. □8 — 5 (3) □flows the table to change □becomes the great measuring range □to flow the table, □□is □the small measuring range □flows the table □great measuring range, needs and □divergence □anti- R (for example □8 — 6 shows): □flows the table □anti- RA to be equal to Rg and R and □□□□anti-, namely. (4) □flows the table and □□the table □anti- □□quantity shade □: □flows table □anti- RA compared to □the quantity leg □anti- smaller, □Lu Yin? the string □turns on □flows □flows □slightly, namely □the difference which the table causes is smaller. □□table □anti- RV compared to □quantity partial □Lu?tsu bigger, □Lu Yin? and □turns on □□the table causes □□□slightly, namely □the difference is smaller. □8 — 6 11. voltammetry □□anti- (1) passes □□decides □the anti- □end □□and flows □□the anti- □class, □asks □the anti- method using the formula to be called the voltammetry. (2) voltammetry □□anti- □kind of □road ratio □. (1) □flows the table □connection (for example □8 — 7 to show) □anti- □size □: U and I divides □is □□the table and □flows the table □□. □flows table □anti- RA and by □□the anti- RX string □, □is flowed the table □anti- RA □minute to go part of □□UA, therefore □anti- really □value □: . From this analyzes, □size R □really □is really bigger than □value R. □RX UA. Namely because □flows the table □anti- minute □function to cause □the difference □to be much smaller. Therefore □flows the table □connection to suit to □the quantity resistance number □is big anti- □. □8 — 7 (2) □flows outside the table the connection (for example □8 — 8 to show) □anti- □size □: U and I divides □is □□the table and □flows the table □□. □□table □anti- RV and by □□anti- RX and □, □□the table □anti- RV □minute goes to a part □to flow IV, therefore □anti- really □value □: . From this analyzes, □size R □really □is really smaller than □value R. □RX IV. Namely because □□the table shunting action causes □the difference □to be much smaller. Therefore □flows outside the table the connection to suit to □the quantity resistance number □is small anti- □. □8 — 8 12. □roads black boxes □□ □the black box □□is □outside an item known some box the port □the quantity □fruit, request basis known □sentences □in the box □□the primary device kind □and □meets the way □□, the analysis and the explanation □□□□needs □□the reversion thinks □the ability. The solution □black box □□usually may according to following method the □analysis: (1) □□flows perhaps □□□according to □□□anti- □according to; (2) □□anti- smallest meets □the column □to meet, by □to □anti- □big meets □the column to make □the deep analysis. In □□□the regulation, every was may the use □met □anti- □possibly uses the string □or and □the method perform to use; Otherwise, turns on again newly □anti-, until completes meets □□stops. (3) completes □the road □carried forward, □□the overall situation, analyzes whether can □anti- use □□□□to be slightly least. 13. families □roads □meet (1) the family □road is main □becomes partially has: □□, □□, guarantees □the box, □□□, □can show, the plug, □□and so on. (2) □□□can □□the energy of light, use in to illuminate; □□with uses □the string □, but □□passes □□the road. (3) guarantees □the box □to have guarantees □□, guarantees □□is with □anti- rate □greatly melts □a is lower than □□alloy to make. □□flows □an ultra □□definite value □, can from □cut □□the source to avoid □badly with □□□or causes the fire □. □with guarantees □□□causes it □to decide □the class to be equal to or slightly to be bigger than □the road biggest normal work □class. (4) □could show uses in □the quantity with □to consume how many □energy; The plug uses in □with □to supply □. (5) each part □meets: Guarantees □the box string □in □the road, □□meets in the fire □on, and with uses □the string □, all □□and plug all □and □. 14. safely uses □ (1) is safe □□: □□□bright, only has is not higher than 36V □□is safe □□. The family □road □□is 220V; □the strength □road □□is 380V, all surpassed has been safe □□. (2) with □□□distinguishes □the fire □and zero □. In the family □road □the root □□, is the fire □, is zero □. The use □□□□, contacts □the tail gold with the hand □, □the sharp contact □□or and □□□□the body. If the neon pipe □light □contact is the fire □, □the light, □the contact is not zero □. (3) safely uses □originally □: Does not contact the low □□□body, does not approach Gao?? the □body. (4) date commonly used □□especially □vigilant this □□□□object □, this □□□□□object □. Therefore □□attention: (1) prevented □□partial broken □; (2) maintenance □□partial is dry; (3) avoids □□contacting with other Jin?wu; (4) wants regular □Zha Chi? to repair. (5) □□□some people touch □□, □quickly pull □□□or □□□select with the dry wooden club □, □cannot use the hand to pull.
