如图甲是某生产流水线上的产品输送及计数装置示意图．其中S为激光源，R1为光敏电阻 如图（甲）所示是某生产流水线上的产品输送及计数装置示意图．其...
\uff082012?\u6f84\u6d77\u533a\u6a21\u62df\uff09\u5982\u56fe\u7532\u6240\u793a\u662f\u67d0\u751f\u4ea7\u6d41\u6c34\u7ebf\u4e0a\u7684\u4ea7\u54c1\u8f93\u9001\u53ca\u8ba1\u6570\u88c5\u7f6e\u793a\u610f\u56fe\uff0e\u5176\u4e2dS\u4e3a\u4e00\u6fc0\u5149\u6e90\uff0cR1\u4e3a\u5149\u654f\uff081\uff09\u7531\u7532\u56fe\u53ef\u77e5\uff1aR1\u3001R2\u4e32\u8054\uff0c\u7531\u5149\u654f\u7535\u963b\u65e0\u5149\u7167\u5c04\u65f6\u963b\u503c\u8f83\u5927\u53ef\u77e5\uff0c\u5f53\u5149\u88ab\u4ea7\u54c1\u6321\u4f4f\u65f6\uff0cR1\u7684\u963b\u503c\u53d8\u5927\uff0c\u7535\u8def\u7684\u603b\u7535\u963b\u53d8\u5927\uff1b\u6839\u636eI=UR\u53ef\u77e5\uff0c\u7535\u8def\u4e2d\u7684\u7535\u6d41\u53d8\u5c0f\uff1b\u6839\u636eU=IR\u53ef\u77e5\uff0cR2\u4e24\u7aef\u7684\u7535\u538b\u53d8\u5c0f\uff1b\u6839\u636e\u4e32\u8054\u7535\u8def\u603b\u7535\u538b\u7b49\u4e8e\u5404\u5206\u7535\u538b\u4e4b\u548c\u53ef\u77e5\uff0cR1\u4e24\u7aef\u7684\u7535\u538b\u53d8\u5927\uff0c\u5373R1\u4e24\u7aef\u7684\u7535\u538b\u8f83\u9ad8\uff0e\uff082\uff09\u4ea7\u54c1\u5bf9\u4f20\u9001\u5e26\u7684\u538b\u529b\uff1aF=mg=0.6kg\u00d710N/kg=6N\uff0c\u53d7\u529b\u9762\u79ef\uff1as=L2=\uff080.1m\uff092=0.01m2\uff0c\u4ea7\u54c1\u5bf9\u4f20\u9001\u5e26\u7684\u538b\u5f3a\uff1ap=Fs=6N0.01m2=600Pa\uff0e\uff083\uff09\u7531\u56fe\u4e59\u53ef\u77e5\uff0c\u4e00\u4e2a\u4ea7\u54c1\u7ecf\u8fc7\u6fc0\u5149\u7684\u65f6\u95f4\u662f0.2s\uff0c\u4e00\u4e2a\u4ea7\u54c1\u7ecf\u8fc7\u6fc0\u5149\u7684\u901f\u5ea6\uff1av=st=0.1m0.2s=0.5m/s\uff0c\u2235\u6c34\u5e73\u4f20\u9001\u5e26\u5300\u901f\u524d\u8fdb\uff0c\u2234\u4f20\u52a8\u5e26\u7684\u8fd0\u52a8\u901f\u5ea6\u4e3a0.5m/s\uff0e\uff084\uff09\u7531\uff081\uff09\u548c\u56fe\u4e59\u53ef\u77e5\uff0c\u65e0\u5149\u7167\u65f6U1=4V\uff0c\u5219U2=U-U1=6V-4V=2V\uff0c\u7535\u8def\u4e2d\u7684\u7535\u6d41\uff1aI=U2R2=2V40\u03a9=0.05A\uff0c\u5149\u654f\u7535\u963b\u7684\u963b\u503c\uff1aR1=U1I=4V0.05A=80\u03a9\uff0e\u7b54\uff1a\uff081\uff09\u5149\u88ab\u4ea7\u54c1\u6321\u4f4f\u65f6\uff0cR1\u4e24\u7aef\u7684\u7535\u538b\u8f83\u9ad8\uff1b\uff082\uff09\u4ea7\u54c1\u5bf9\u4f20\u9001\u5e26\u7684\u538b\u5f3a\u4e3a600Pa\uff1b\uff083\uff09\u4f20\u52a8\u5e26\u7684\u8fd0\u52a8\u901f\u5ea6\u662f0.5m/s\uff1b\uff084\uff09\u65e0\u5149\u7167\u5c04\u65f6\u5149\u654f\u7535\u963b\u7684\u963b\u503c\u4e3a80\u03a9\uff0e
\uff081\uff09\u03c1=mV=mL3\uff1d0.60.13kg/m3=0.6\u00d7103kg/m3\uff082\uff09p=FS\uff1dmgL2\uff1d0.6\u00d7100.12Pa=600Pa\uff083\uff09\u6709\u5149\u7167\u5c04\u65f6U1=2V\uff0cU2=U-U1=4V\uff0cR1R2\uff1dU1U2\uff0cR1=U1U2R2=24\u00d740\u03a9=20\u03a9\u5149\u88ab\u6321\u4f4f\u65f6U1\u2032=4V\uff0cU2\u2032=U-U1\u2032=2V\uff0cR1\u2032R2=U1\u2032U2\u2032\uff0cR1\u2032=U1\u2032R2U2\u2032=42\u00d740\u03a9=80\u03a9\u5149\u654f\u7535\u963b1h\u6d88\u8017\u7684\u7535\u80fdW1=U12R1t1=(2V)220\u03a9\u00d723\u00d73600s=480JW2=U1^2R1\u2032t2=(4V)2</
由题意可知;有光照射时,R1的压降为2V,无关照射时,R1的压降为4V.所以推出有光照射时光敏电阻R1的阻值为2V/((6V-2V)/400Ω)=200Ω,无关照射时光敏电阻R1的阻值为4V/((6V-4V)/400Ω)=800Ω.所以A选项错的,C选项也是错的. 有光照射和无光照射时保护电阻R2两端的电压分别为4V和2V,所以电压之比为2：1,所以B选项错的.从乙图可以看出,每通过一个产品的周期为0.6s,所以每1h通过S与R1之间的产品个数为(60*60)s*(1/0.6)=6000个.所以D选项正确的.综合可知正确答案为D.绛旓細鍥犱负鍋氬寑閫熺洿绾胯繍鍔紝涓よ呮病鏈夌浉瀵硅繍鍔ㄥ強鐩稿杩愬姩鐨勮秼鍔匡紝鎵浠ヤ笉鍙楁懇鎿﹀姏鐨勪綔鐢紝鏁匓閿欒锛汣. 鐢卞浘璞″彲鐭ワ細姣忕粡杩0.6s锛屽氨鏈変竴涓浜у搧閫氳繃璁℃暟瑁呯疆锛 涓紝鏁匔姝ｇ‘锛汥. 鐢卞厜鏁忕數闃绘湁鍏夌収灏勬椂闃诲艰緝灏忓彲鐭ワ紝
绛旓細C 璇曢鍒嗘瀽锛氱敱鐢插浘鍙煡锛歊 1 銆丷 2 涓茶仈锛岀敱鍏夋晱鐢甸樆鏈夊厜鐓у皠鏃堕樆鍊艰緝灏忓彲鐭ワ紝褰撴湁鍏夌収灏勬椂锛孯 1 鐨勯樆鍊煎彉灏忥紝鐢佃矾鐨勬荤數闃诲彉灏忥紱鏍规嵁 鍙煡锛岀數璺腑鐨勭數娴佸彉澶э紱鏍规嵁 鍙煡锛孯 2 涓ょ鐨勭數鍘嬪彉澶э紱鏍规嵁涓茶仈鐢佃矾鎬荤數鍘嬬瓑浜庡悇鍒嗙數鍘嬩箣鍜屽彲鐭ワ紝R 1 涓ょ鐨勭數鍘嬪彉灏忥紝鐢卞浘璞＄煡R 1 鐨勭數鍘...
绛旓細鎵浠閫夐」閿欑殑.浠庝箼鍥惧彲浠ョ湅鍑,姣忛氳繃涓涓浜у搧鐨勫懆鏈熶负0.6s,鎵浠ユ瘡1h閫氳繃S涓嶳1涔嬮棿鐨勪骇鍝佷釜鏁颁负(60*60)s*(1/0.6)=6000涓.鎵浠閫夐」姝ｇ‘鐨.缁煎悎鍙煡姝ｇ‘绛旀涓篋.
绛旓細灏辨湁涓涓骇鍝侀氳繃璁℃暟瑁呯疆锛屽垯姣1h閫氳繃S涓嶳l涔嬮棿鐨勪骇鍝涓暟锛歯=3600s0.6s/涓=6000涓紝C姝ｇ‘锛涳紙4锛夌敱鐢插浘鍙煡锛歊1銆丷2涓茶仈锛岀敱鍏夋晱鐢甸樆鏈夊厜鐓у皠鏃堕樆鍊艰緝灏忓彲鐭ワ紝褰撴湁鍏夌収灏勬椂锛孯1鐨勯樆鍊煎彉灏忥紝鐢佃矾鐨勬荤數闃诲彉灏忥紝鈭礗=UR锛屸埓鐢佃矾涓殑鐢垫祦鍙樺ぇ锛孯2涓ょ鐨勭數鍘嬪彉澶э紱鈭典覆鑱旂數璺荤數鍘嬬瓑浜庡悇鍒嗙數鍘...
绛旓細锛1锛0.5m/s锛2锛10惟锛3锛3600 J 璇曢鍒嗘瀽锛氾紙1锛 m/s锛2锛夋湁鍏夌収鏃讹紝 U 1 =2V鍥犱负涓茶仈锛屾墍浠 鍗 R 1 鏈 锛10惟锛3锛夋湁鍏夌収鏃讹紝 A鏃犲厜鐓ф椂锛 A涓涓懆鏈燂紙鏈夊厜鐓0.4s锛屾棤鍏夌収0.2s锛夋秷鑰楃數鑳斤細 J 1h娑堣楃數鑳斤細 J鐐硅瘎锛氭湰棰樺叧閿湪浜庢牴鎹鎰忓拰绀烘尝鍣ㄦ樉绀...
绛旓細2V=12锛岃В寰桿=6V锛涳紙3锛夌敱鍥捐薄鍙煡锛氭瘡缁忚繃0.6s锛屽氨鏈変竴涓浜у搧閫氳繃璁℃暟瑁呯疆锛屽叾涓0.4s鏈夊厜鐓у皠锛岀數闃籖2娑堣楃殑鐢佃兘W2=U2It1=4V脳0.1A脳0.4s=0.16J锛涘叾涓0.2s鏃犲厜鐓у皠锛岀數闃籖2娑堣楃殑鐢佃兘W2鈥=U2鈥睮鈥瞭2=2V脳0.05A脳0.2s=0.02J锛涘洜姝ゆ瘡缁忚繃0.6s锛岀數闃籖2娑堣楃殑鐢佃兘涓篧=W2+W2鈥=0....
绛旓細瑙ｏ紙1锛夌敱棰樼煡锛孯1涓嶳2涓茶仈鎺ュ湪6V鐢垫簮涓婏紝鈶犳湁鍏夌収灏勬椂锛岄樆鍊艰緝灏忥紝鍒嗗帇杈冨皬U1=3V锛孶2=U-U1=6V-3V=3V锛涒埖I=U1R灏=U2R2锛屸埓R灏=U1R2U2=3V脳20惟3V=20惟鈶℃棤鍏夌収灏勬椂锛岄樆鍊艰緝澶э紝鍒嗗帇杈冨ぇ涓篣鈥1=4V锛孶鈥2=U-U鈥1=6V-4V=2V锛涒埖I=U鈥1R澶=U鈥2R2锛孯澶=U鈥1R2U鈥2=4V...
绛旓細锛1锛夎緝楂 锛2锛0.5m/s (3)0.05A 20惟 璇曢鍒嗘瀽锛氾紙1锛夊厜鏁忕數闃绘棤鍏夌収灏勬椂锛岄樆鍊艰緝澶э紝鍏夎浜у搧鎸′綇鏃讹紝R 1 涓ょ鐨勭數鍘嬭緝楂 锛2锛夎瀵熷浘锛堜箼锛夌煡鎸″厜鏃堕棿涓0.2s锛屽洜姝や紶閫佸甫鐨勯熷害 锛3锛夋棤鍏夌収灏勬椂鐢佃矾涓殑鐢垫祦锛 锛涙湁鍏夌収灏勬椂鐢佃矾涓殑鐢垫祦锛 锛
绛旓細锛1锛夊洜R1涓嶳2涓茶仈锛屾墍浠ユ湁鍏夌収灏勬椂锛堟病鏈浜у搧浠庝紶閫佸甫涓婇氳繃S涓嶳1涔嬮棿锛夛紝鍏夋晱鐢甸樆R1鐨勯樆鍊艰緝灏忥紝缁撳悎涔欏浘鍙煡鍒嗗帇杈冨皬涓2V锛庯紙2锛夌敱棰樻剰缁撳悎涔欏浘鍙煡锛屽綋鍏夋晱鐢甸樆鍦ㄦ棤鍏夌収灏勬椂锛屽厜鏁忕數闃讳袱绔殑鐢靛帇U1=4V锛屾墍浠2涓ょ鐨勭數鍘嬩负U2=U-U1=6V-4V=2V锛涚數璺腑鐨勭數娴両=U2R2=2V40惟=0.05A锛屽厜鏁...
绛旓細锛1锛夌敱鍥剧煡锛孯1涓嶳2涓茶仈锛屾棤鍏夌収鏃禦1鐨勭數鍘嬩负4V锛屾湁鍏夌収鏃禦1鐨勭數鍘嬩负2V锛氭棤鐓ф椂锛岀數璺腑鐨勭數娴侊細I1=I2=U?U1R2=6V?4V40惟=0.05A锛孯1=U1I1=4V0.05A=80惟锛涙湁鍏夌収鏃讹紝鐢佃矾涓殑鐢垫祦锛欼1'=I2'=U?U鈥1R2=6V?2V40惟=0.1AR1'=U鈥1I鈥1=2V0.1A=20惟锛涳紙2锛夌敱鍥捐薄鐭ワ紝1h鍐...
