电势是标量,为啥只有大小,没有方向啊,不是有正负吗? 电势是标量,为啥只有大小,没有方向啊,不是有正负吗?
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绛旓細鐢靛娍鍙湁澶у皬锛屾病鏈夋柟鍚戙傚畠鏄爣閲忥紝瀹冪殑鍊兼病鏈夌粷瀵规剰涔夛紝鍙湁鐩稿鎰忎箟銆傞潤鐢靛満鐨勫娍鑳姐傜偣鐢佃嵎鍦ㄩ潤鐢靛満涓袱鐐圭殑鍔胯兘涔嬪樊绛変簬闈欑數鍔涗粠A鐐硅繍鍔ㄥ埌B鐐规椂鎵鍋氱殑鍔燂紝鍥犳WAB=qEd锛岀數鍔胯兘涓虹數鑽峰拰鐢靛満鎵鍏辨湁锛屾槸缁熶竴鐨勩傜數鍔胯兘鍙湁澶у皬锛屾病鏈夋柟鍚戯紝鏄爣閲忥紱鐢靛満寮哄害鏄敤鏉ヨ〃绀虹數鍦哄己搴﹀拰鏂瑰悜鐨勭墿鐞嗛噺銆傚疄楠岃〃...
绛旓細鐢靛娍鑳藉彧鏈夊ぇ灏忥紝娌℃湁鏂瑰悜锛屾槸鏍囬噺;鐢靛満寮哄害鏄敤鏉ヨ〃绀虹數鍦虹殑寮哄急鍜屾柟鍚戠殑鐗╃悊閲銆傚疄楠岃〃鏄庯紝鍦ㄧ數鍦轰腑鏌愪竴鐐癸紝璇曟帰鐐圭數鑽凤紙姝g數鑽凤級鍦ㄨ鐐规墍鍙楃數鍦哄姏涓庡叾鎵甯︾數鑽风殑姣斿兼槸涓涓笌璇曟帰鐐圭數鑽锋棤鍏崇殑閲忋備簬鏄互璇曟帰鐐圭數鑽凤紙姝g數鑽凤級鍦ㄨ鐐规墍鍙楃數鍦哄姏鐨勬柟鍚戜负鐢靛満鏂瑰悜锛屼互鍓嶈堪姣斿间负澶у皬鐨勭煝閲忓畾涔変负璇ョ偣鐨...
绛旓細鏍囬噺鏄彧鏈夋暟瀛楀ぇ灏忥紝娌℃湁鏂瑰悜鐨勯噺锛岀數鍔挎湁姝h礋锛屾病鏈夋柟鍚戯紝姝h礋鐨勪唬琛ㄥ氨鏄ぇ灏锛岃繖鏍峰氨鑳芥竻妤氬湴鐪嬪嚭鏉ョ數鍔垮氨鏄爣閲忋傚湪鐢靛満涓煇鐐规斁鍏ョ數鑽凤紝杩欎釜鐢佃嵎灏卞叿鏈夌數鍔胯兘銆傜數纾佸満闅忔椂闂村彉鍖栨椂锛屽彲浠ョ敤鏍囬噺鍔垮拰鐭㈤噺鍔挎潵鎻忚堪銆傜數纾佸満闅忔椂闂村彉鍖栵紝鐢靛娍鐨勮В涓庨潤鐢垫儏鍐典笅锛岀數鍔跨殑瑙f槸涓鏍风殑锛屾爣閲忓娍婊¤冻鎷夋櫘鎷夋柉鏂圭▼...
绛旓細鐢靛娍鏍囬噺銆備笉鏄煝閲忥紝鏄爣閲忋鐢靛娍鍙湁澶у皬锛屾病鏈夋柟鍚锛屾槸鏍囬噺锛屽叾鏁板间笉鍏锋湁缁濆鎰忎箟锛屽彧鍏锋湁鐩稿鎰忎箟銆傚湪鐢靛満涓紝鏌愮偣鐢佃嵎鐨勭數鍔胯兘璺熷畠鎵甯︾殑鐢佃嵎閲(涓庢璐熸湁鍏筹紝璁$畻鏃跺皢鐢靛娍鑳藉拰鐢佃嵎鐨勬璐熼兘甯﹀叆鍗冲彲鍒ゆ柇璇ョ偣鐢靛娍澶у皬鍙婃璐)涔嬫瘮锛屽彨鍋氳繖鐐圭殑鐢靛娍锛岄氬父鐢ㄤ腑鏉ヨ〃绀恒傚湪闈欑數瀛﹂噷锛岀數鍔(鍙堢О涓虹數浣...
绛旓細鍐冲畾寮忥細蠁A=Ep/q 鐢辩數鍦轰腑鏌愪竴鐐圭數鍔肯嗙瓑浜庣數鑽烽噺涓簈鐨勬鐢佃嵎鍦ㄨ繖涓鐐圭殑鐢靛娍鑳紼p涓巕鐨勬瘮鍊煎喅瀹氥鐢靛娍鍙湁澶у皬锛屾病鏈夋柟鍚锛屾槸鏍囬噺锛屽叾鏁板间笉鍏锋湁缁濆鎰忎箟锛屽彧鍏锋湁鐩稿鎰忎箟銆
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绛旓細鐢靛姩鍔挎槸鏍囬噺锛瀹冪殑鏂瑰悜浠h〃澶у皬涓嶄唬琛ㄦ柟鍚戙傚湪姣旇緝鐢靛姩鍔垮ぇ灏忔椂瑕佽冭檻姝h礋锛屽洜涓哄畠鐨勬璐熸槸浠h〃瀹冪殑澶у皬锛鎵浠ヨ甯︽璐熷彿浜嗭紝鏍囬噺姣旇緝澶у皬閮芥槸瑕佸甫瀹冪殑姝h礋鍙风殑銆傚洜涓虹數鍔垮綋涓瓨鍦ㄩ浂鐢靛娍鐨勬蹇碉紝鍗崇數鍔夸负0鐨勭偣銆傞偅涔堝氨蹇呯劧涔熷瓨鍦ㄧ數鍔垮ぇ浜0鍜屽皬浜0鐨勭偣锛屽ぇ浜0鐨勭偣锛岀數鍔ㄥ娍涓烘锛屽皬浜0鐨勭偣锛岀數鍔ㄥ娍涓...
绛旓細鏁匴AB=qEd (E涓鸿鐐圭殑鐢靛満寮哄害锛宒涓烘部鐢靛満绾跨殑璺濈) 锛岀數鍔胯兘鏄數鑽峰拰鐢靛満鎵鍏辨湁鐨勶紝鍏锋湁缁熶竴鎬с鐢靛娍鑳藉彧鏈夊ぇ灏忥紝娌℃湁鏂瑰悜锛屾槸鏍囬噺銆傜數鍔胯兘鍏紡涓庣數鍦猴紝澶勪簬鐢靛満涓殑鐢佃嵎鍙婄數鍔胯兘闆剁偣鐨勯夋嫨鏈夊叧锛屽浜庣偣鐢佃嵎锛堢數閲忎负q锛変骇鐢熺殑闈欑數鍦猴紝鍏剁數鍔胯兘涓庣數鑽穛鎵澶勭┖闂翠綅缃埌鐐圭數鑽锋墍鍦ㄤ綅缃殑璺濈r鏈夊涓嬪叧...