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        1. Ӣҽ̾W(wng) > > }ĿԔ

          }ĿijƼСMO(sh)ӋDʾ܇D(zhun)·ģԭDͨ(yng)ָʾԓָʾl(f)⣩΢l(f)⣩Wq·Դ늉12V׃ָʾҎ(gu)顰12V 6WR0鶨ֵD(zhun)D(zhun)ָʾΪWqr늉ɶˌH늉Srg׃Ҏ(gu)DʾO(sh)ָʾ費׃늴FȦFֵӋ
          ָʾ
          D(zhun)_P(gun)Sc|c3͡4|rָʾl(f)B(ti)ͨ^F
          D(zhun)_P(gun)Sc|c2͡3|rָʾ΢l(f)B(ti)µČH늹ʣ
          D(zhun)_P(gun)Sc|c4͡5|rָʾWq1minĵܣ

          𰸡⣺P= ָʾ裺
          RL= = =24
          ·D֪D(zhun)_P(gun)34rD(zhun)D(zhun)ָʾͬr
          P=UIָ֪ʾ̎l(f)rͨ^IL= = =0.5A
          tͨ^FI=2IL=20.5A=1A
          D(zhun)_P(gun)Sc|c2͡3|rɈDҿ֪(dng)ָʾ΢l(f)rR0ɶ˵늉U0=9.6V
          “(lin)·п늉ڸ늉ָ֮ʾɶ˵늉
          UL=UU0=12V9.6V=2.4V
          tָʾČHʣ
          PL= = =0.24W
          D(zhun)_P(gun)Sc|c4͡5|rɈDҿ֪湤ڞ0.3sһڃ(ni)l(f)rg0.2s΢l(f)rg0.1s
          tָʾWq1min
          l(f)ĕrgt1= 0.2s=40s΢l(f)ĕrgt2=tt1=60s40s=20s
          P= ɵl(f)ĵܣ
          W1=PLt1=6W40s=240J
          ΢l(f)rĵܣ
          W2=PLt2=0.24W20s=4.8J
          ܣ
          W=W1+W2=240J+4.8J=244.8J
          𣺢ָʾ24D(zhun)_P(gun)Sc|c3͡4|rָʾl(f)B(ti)ͨ^F1AD(zhun)_P(gun)Sc|c2͡3|rָʾ΢l(f)B(ti)µČH늹ʞ0.24WD(zhun)_P(gun)Sc|c4͡5|rָʾWq1minĵܞ244.8J
          ָ֪ʾ~늉~(j)P= ָʾ裻·D֪D(zhun)_P(gun)Sc|c3͡4|rD(zhun)D(zhun)ָʾͬrָʾ̎l(f)B(ti)P=UIͲ“(lin)·cͨ^FD(zhun)_P(gun)Sc|c2͡3|rɈDҿ֪R0ɶ˵늉(j)“(lin)·늉cָʾɶ˵늉(j)P= ָʾ΢l(f)B(ti)µČH늹D(zhun)_P(gun)Sc|c4͡5|rɈDҿ֪湤ںһڃ(ni)rg(j)D(zhun)ָʾWq湤1min(ni)l(f)ĕrgMһ΢l(f)ĕrg(j)P= l(f)ĵܺ΢l(f)rĵܣ֮ͼ鹲ܣ
          }·BӵД늹ʹʽ“(lin)·cWķɡ늹ʽđ(yng)P(gun)IǏĈDеóָʾĕrg΢l(f)rĕrg
          c}P(gun)IWķɼ䑪(yng)õP(gun)֪R՚Wķɵđ(yng)ã ͬһֵ׃c늉oP(gun) @ɶ˵늉rͨ^Ҳ󣮣R=U/I (dng)늉׃rԽtͨ^ԽI=U/R (dng)һrԽ󣬄tɶ˵늉Խ󣮣U=IRԼ늹Ӌ⣬˽늹Ӌ㹫ʽW=UItʽІλW(J)U(V)I(A)t룩

          (x)ϵд
          P(gun)(x)}

          Ŀ Դ

          }ĿDʾСA̽͹͸RҎ(gu)ɡČ^̣

          1ΌcȼϞT͹͸Rڹ{(dio)(ji)T͹͸R__________

          2r׽M(sh)(j)ӛڱ

          34Όrc__________

          4(dng)ϵõһsСČr͸Rλò׃Ҫʹϵ׃Щ(yng)ϞT__________͸R__________͸R/hx

          51ΌrСAһҕRoN͹͸RǰҪڹٴεõ(yng)__________/hx͸RƄ

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          1ṩ^^ăɉK(yng)xIJ򞣻ͬrxÃɹ(ji)ͬĸ늳ĿǞ˱^wP(gun)ϵ
          2Qֱˮƽǰ늳AƄӲ늳Bֱȥ늳Bc늳A
          3늳Bλl(f)F(xin)xܡ򡰲ܡнӵfƽRɵ
          4늳Ahx巽Ƅһξx늳AĴС

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          }Ŀ2016628գP(gun)עόF1̖|ΌMԇ\AΣϺվVվ·̞380mF1̖܇ϺվVվ\Еrgs40s܇s2104N@·У
          ܇ƽٶ
          ܇Ĺ

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          }ĿDʾû݆MbÄˮƽϵw֪wˮƽܵĻĦ0.1wӵľx1m(dng)w|(zh)2kgr݆MęCеЧʞ50%ӋKغKc݆gĦ
          w|(zh)2kgrˮƽܵĻĦ
          ڄӻ݆
          w|(zh)10kg0.1m/sٶȄ\ӕrFĹʣ

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          A.ůˮů֣еů

          B.ֹͣǧԽ[Խ

          C.ˮrˮw

          D.䏗lľ^䏗lض

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          B.•еĂٶ340m/s

          C.ϴˮĜضȴs70

          D.׌˸Xmķgض25

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          }ĿհbʳƷ߅һ䏿͵ȱ_r

          A.B.󉺏

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