初中物理《讓電燈發(fā)光》教案
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28、ê?ó?μ?ò???ê?ò????è?á???aμ??a?ê￡?óé??·ú?ˉì?×÷?y??2?á?μ???μ?3?￡?áíò???ò????ˉ???aμ??a?êóé?t???ˉáò?a?y??2?á?μ???μ?3??￡ ??μ?3?μ??÷òaó?μ?ê??ú??D?μ?ì??y?ò×?????￡??ü·?3?è|ì×μ?μ??ü￡¨±è?üá?±èD?ò?μ?3?′óμ??à￡?￡?·?μ?ê±μ??1??ê?·????è￡?′￠′?êù?ü3¤￡??ü?úoü?í1????è·??§?úóDD§1¤×÷?￡ó|ó?oíD?ò?μ?3??àí??￡′ó·￠?1?÷ê??′￡???
29、μ?3?μ??o?ù?üá|??3?1yD?ò?μ?3??￡ ￠?ì???μ?3? ???°3￡ó?μ?ì???μ?3?ê?óé1è??3éμ?￡?ò?°?ê??úμ?×óDíμ￥?§1è??D???é?ó?à?é￠·¨é???ò?±?2??e￡?ò?μ?μ??á￡?è?oó?ù?óé?μ????￡μ±è?1a?±é?μ?é?á??eμ?±?2???é?ê±￡?á??????í2úéúμ??ˉê??￡?a??μ?3??é×÷è??ì?àD?é?ò??÷μ?μ??′?￡3y1èía￡?éé?ˉ??ò2ê???×÷ì???μ?3?μ?o?2?á??￡ 5?￠éú??μ?3?óDê2?′??ó
30、? ??×????§??ê?μ?·￠?1￡?è???à?ó?ê÷ò??￠o?ìò???￠ó??×D??￠à????￠?a??μè·????a?°è?á??±￡?ó?à′???ìμ?3?￡??aààμ?3??Déú??μ?3??￡oí??í¨μ?3??à±è￡?éú??μ?3?óDoü?àó?μ?￡??ü2????á11?òμ￥￡?1¤×÷?é??￡?2?·?èè￡?2??e?μμ??·°?￡?3é±?μí￡????ò?T??éù￡?2???è??·?3￡?ò22?ò×ê§?eoí±??¨?￡ ???ú￡?ò?D?o￡é?D?o?μ??￠o?±êμ?oío￡é??T??μ?éè±?ò??-ê
31、1ó?óé???ú?￠o￡??μèóD?ú??·￠μ?μ?éú??μ?3??￡ó?éú??μ?3?×÷?ˉá|μ??￡Dí′?￡?ò2ò??-?ú′óo￡?Do?DDá??￡óDè?éè??°?????o￡?ó×÷?a??ò????T′óμ?éú??μ?3?￡??úo￡?óé??¨á￠?eμ?á|1¤òμ?ùμ??￡ ?1óDè?éè??￡???éú??μ?3?×÷?aò???μ?á|à′?′￡??úó???·é′?é?ê1ó??￡′ó?ò?aμà￡???è?ó???·é′??úì????Do?DDê±￡?ó?o??±′úD???3?μ??t???ˉì??￠?ò·à×a?ˉ3é?éò?à?ó
32、?μ??????￠??oíê3??￡?òaêμ??·é′??úμ????ê?-?·￡?éú??μ?3?ê?±?2??ééùμ??￡?à1ú???§?ò?-1yêμ?é￡?ò??ú·￠é?μ??°??×óD?×ù?±oí?°°￠2¨?T?±o?ó???·é′?é?ê1ó?á?éú??μ?3??￡éú??μ?3?·?3?μ??ü￡?ó?à′í¨D?oí????ó???·é′?￡?ê1·é′??úêμ?????ê?-?·?￡·é′???óDê2?′·????é?a?ú￡??í?éò??á×°?°??￡?·é?òé???μ?ì???é?′|?￡ μú?t?ú??è?μ?μ?·￠1a???§°?
33、 ?§?°??±ê￡o1?￠?üí¨1yêμ?éì???á??aμ??·μ?×é3é￡?D?3éμ??·μ??????￡ 2?￠?üá??aí¨?·?￠?a?·?￠?ì?·￡?è?ê??ì?·μ??￡o|?￡ 3?￠í¨1yêμ??è?ê?μ??·?a?t?°??·?o?￡??á?á?￠?á?-?òμ￥μ?μ??·í??￡ ?§·¨??μ?￡o±??úò??¨òa×?o?ì???êμ?é￡?′óμ¨2????￠?ˉê?2ù×÷￡?????·???1é?é?üá|￡?í?ê±òa??óD°2è?2ù×÷μ?òaê??￡??óú?-μ??·í?￡?ò??¨òa1?·?￡?è???￡?òa?§
34、?áóéêμ??í??-3?μ??·í??￡ ?aê?í???×ü?á￡o ×é3é￡o μ??′￡o ó?μ??÷￡o μ??· ?÷?a?tμ?×÷ó?￡o ?a1?￡o μ???￡o μ?á÷￡o è?μ?μ?·￠1a í¨?·￡o μ??·μ?×′ì? ?a?·￡o ?ì?·￡o μ??·í?￡o êíòé?a??￡o 1?￠?a1?ò?±?o?￡?à?μ??′oü??μ?·?μ?μ?μ??íé??íááá?￡??aê?·??μ?÷μ????Dμ?oé?¨?òò??ˉμ?oü?ì??￡? 2??ü?μ?÷μ?oé?¨?òò??ˉμ?oü?ì￡?μ?oé?¨?ò
35、ò??ˉμ??ù?èê?oüD?μ??￡?a1?ò?±?o?￡?à?μ??′oü??μ?μ??íé??íááá?￡?2?ê?òò?aμ??′′|μ?μ?oé?¨?òò??ˉμ?á?μ??Y′|￡???ê?òò?a?a1?±?o?ê±￡?μ??·?D?÷′|μ?μ?oéí?ê±?aê??¨?òò??ˉμ??μ1ê?￡ 2?￠??àí?D1??¨￡??yμ?oé?¨?òò??ˉμ?·??ò?aμ?á÷μ?·??ò?￡?oμ?oé?á?¨?òò??ˉ?e￡? ???á￡??eê?μ????Dμ?μ?á÷?íê?óé′??oμ?oéμ?μ?×ó?¨?òò??ˉD?3éμ??￡òò′?￡??eê?μ
36、????Dμ?á÷μ?·??òê??úμ?×ó?¨?òò??ˉ·??ò?à·′μ??￡ μ?á÷?è?é?üê??yμ?oé?¨?òò??ˉD?3éμ?￡?ò2?é?üê??oμ?oé?¨?òò??ˉD?3éμ??￡?1?é?üê??y?￠?oμ?oé?¨?òò??ˉD?3éμ??￡àyè??ò???ú?ˉ?§à??§μ?μ??á?￠???￠????èüòo￡??ü???Dμ?μ?á÷?íê?óé?y?oμ?oé?ò?à·′·??ò?¨?òò??ˉD?3éμ??￡ 3?￠???ù?yè·àí?a?ì?·￡? í¨3￡μ??ì?·óDá????é??￡?ò???ê?μ??′?ì?·￡?áí
37、ò???ê???2??ì?·?￡ μ??′?ì?·￡oó?μ????±?ó??μ??′á???á??eà′è?í?079?ùê?￡?μ±s1±?o?ê±￡?·￠éú?a?ùμ??é??￡?μ??·?D?áóDoü′óμ?μ?á÷￡?μ??′???á±?é??μê?????2??êDíμ??￡ ??2??ì?·￡oó?ò??ùμ??????3ó?μ??÷μ?á???á??ó?eà′￡??aê±??óDμ?á÷í¨1y??ó?μ??÷￡?è?í??Dμ±s1???a￡?s2?￠s±?o?ê±￡?l1±???2??ì?·￡??aê±??óDμ?á÷?-1yl1?￡ ×??ò?ì2a￡o 1?
38、￠?úè?í?080￡??ùê?μ?μ??·?D￡??yè·μ?ê?￡¨￡? 2?￠è?í?081?ùê?￡??ò3???áDμ??·á??óí??Dμ?′í?óó?2?×??￡ 3?￠???ù?Yí?082êμ??í??-3?μ??·í??￡ ′e°?￡o 1?￠c 2?￠￡¨a￡?í??D±?o??a1?·￠éú?ì?·?￡￡¨b￡?í??Dμ?3?á??ó′í?ó?￡￡¨c￡?í??Dμ???óD??2????ó?￡ 3?￠ ??á÷?°μ?￡o ??ía????￡o 1?￠ ì????üμ?3?°??aê2?′?ü1?·￠μ?￡? ?Y?￥é????úì????üμ
39、?3?°?￡??í?éò?êμ???ò?Dó?μ?μ?×????￡ì????üμ?3?°?ò2í??§ì?1üò??ù￡?ê?óé°?μ?ì?×é3éμ??￡?üμ??÷òa2?á?ê?1è￡?ò2óDò?D?????o??e?￡ ì????üμ?3?°?μ?±í??óéá???D??ê?÷òìμ?2?·?×é3é?￡μ±ì????üμ?3?°?êüμ?1aμ???é?ê±￡??ü1?°?1a?ü×a±??aμ??ü￡?ê1μ?á÷′óò?·?á÷?òáíò?·??￡ì????üμ?3?°??íê??ù?Yáé???-àíéè??μ??￡ ì????üμ?3???ê?êüμ???1a?òμ
40、?1aμ???é?￡?ò?°??í?é·￠3??àμ±óú?ù?óê?1a?üμ?1/10μ?μ?à′?￡?aá?ê1ì????üμ?3?°?×?′ó?T?èμ???éù1a·′?ò￡?ê11a?ü×a±??aμ??ü￡?ò?°??ú?üμ?é??????éé??￡2????°￡????§?ò?D??3é1|á?ò?????D§μ?ì????üμ?3?°??￡?ü2???°×ìì?üìá1?μ??ü￡????ò?úò1??ò2?éìá1?μ?á|???￡ 2?￠ ×?????1?μ?3? ?òò??ù5cm3¤μ?í-???ò′?í-??￡¨ò2?éò?ó??ê?úò??eμ????ù??
41、í-??à′′úì?￡?￡??ù′ó·??éμ?3?é???ò?ì?2cm?íμ?D??¤￡?1????￡°?í-??oíD??¤2?è???1??ò±eμ???1?￡¨ò2?éò?ó?·????òíá?1￡?à?￡??í×?3éá?ò?????1?μ?3??￡???ú?ú??ò??ùμ??????óμ?ò???μ???é?￡?μ±áíò??ùμ??????úáíò???μ?????D??ó′￥ê±￡?′ó?ú?úà??üìyμ?μ?á÷òy?eμ??|à-?|à-μ?éùò??￡ò2?éò?è?á??ùμ???￡?°??ü??μ?ò???·?±e?óμ???1?μ?3?μ?á???￡?áíò
42、???oíéàí·??D??ó′￥￡?×￠òaá??ùμ???2?òa??×?￡??aê±éàí·é?óDê2?′?ùμ??D??￡? 3?￠?a?1μ??·á??óμ??oèü???ˉ￡?è??§éú?aμàμ??·á??óμ?·?·¨￡?è?￡oá??óê±′óμ??′μ??y???a?3×?μ?á÷μ?·??ò￡?òà??μ??·í?°?ò??????a?tá??ó?eà′￡?×?oóá?μ?μ??′μ??o???￡?1?éò???×?μ?á÷μ?·??òá??óμè?￡í¨1y?a?ùμ????ˉ￡??éò??????§éúμ??ˉê??￠?ˉ???üá|￡??1?éò??????§
43、éúμ??o?ùòaê?oíì??÷??é??￡ 4?￠μ÷2ééú???Dμ?ó?μ??÷?￠?a1??￠μ????￠μ??′?￡?à???§éúμ÷2é?￠???¤μ??üá|￡?μ÷2é3￡ó?ó?μ??÷μ??á11?￠·￠?1?￠ó?í?￡??ù?Y1?2ì?￠ì??÷ìá3?????μ?·?·¨?￡°???àí??ó?óúéú?????D?￡ 5?￠2é??D?Díμ?3?μ?×êá?￡?1?×￠?ü?′μ??a·￠oíà?ó?￡?????àúê·?eè??Doíê1?ü?D?￡ 6?￠5o?μ?3???ó?3￡ê? í?ê?5o?μ?3?￡?ía1???oü????￡??
44、???è′?à1?êy±?￡??ú2?á??a??D??üμ??é????￡???ó?ê±íùíùê1è??Dμ?3ì3ù?￡ μ?3?μ?????ê?ó??üμ?ó?í?￡???ê?2?êy·?2??aμ??￡??5o?μ?3?￡??íóD??í¨D?μ?3??￠??èYá?μ?3?￡???1|?êμ?3?￡???D????üμ?3?μè?￡?1?é′ó??ía???T·?2íμ?±ê??￡?è?r6s?￠r6c?￠r6p?￠lr6μèà′??±e?￡?T???????éμ?3?￡?·?μ?ê±′ó?üá?×a?ˉμ????èà′?′￡???ê????ˉ?§?ü×a?ˉ?aμ??üμ??￡
45、 ?°r?±′ú±íμ?3??a?2?ùì??￡?°6?±?aμ?3?Dòo?￡?±íê??a5o?μ?3??￡ ?°s?±±íê???í¨Díμ?3?·￠￡?êêó?óú????D?D?μ?á÷ó?μ?μ?μ??÷￡?è?°?μ?ì?ê?ò??ú￡?êˉó￠?óμè?￡ ?°c?±±íê???èYá?μ?3?￡?ó?3??§Dí??°?μ?3??￡òò?üó?oü±?μ???°?′úì?×ó?-à′μ?oy×′μ??a?ê￡??àá?mno2?y??2?á?￡?òò′?￡?èYá?±è??í¨μ?3?′ó?￡ ?°p?±±íê??÷1|?êμ?3??￡êêó?óú??μ?á÷oí?ì
46、D?·?μ?ê1ó?￡???éíìy?D￡?ê1ó??°r6s?±μ?3?ó?á?1hò?é??í2?á?￡???ó??°r6p?±μ?3??éìy3 ????4h￡?ò?é?òàè?ó??à?￡ ?°l?±±íê???D?μ?3?￡???μ?3?μ???·′ó|???y′ó￡??ú×è′ó￡????ooé·?μ??üá|ê?ò?é?????μ?3?μ?êy±??￡ ?1óDò????é3?μ??ó??μ?3??￡óéóú?ü?é·′?′3?μ?ê1ó?￡?òò′?ê1ó?êù?üoü3¤?￡ è?ó?ìêμ?￡???·??úμè′óμ?á÷3?o?￡??éó??°r6p?±?°lr6?±?ò?ó??μ?3?￡?????????￡?ê1ó?ê±??3¤￡?ò????a?ùμ?μ?3??é?￥????é??áêyê??????üDío?μ?3?￡?·′???üòa?-??D??￡è?ó?ê?ò??ú￡?ê?μ?í2????D?D?μ?3?·?μ?μ?3?o?￡??ò2?·à?????°r6s?±?°r6c?±Díμ?μ?3??￡òò?a￡??ú?á?o??????D?ê1ó?ê±￡??aààμ?3?μ?D??üó????üμ?3??à2??T??￡?????±?ò?μ??à?￡