电动势方向和电源端电压方向有何关系? 直流电源的电压和电动势方向相反，交流电源的端电压和电动势方向...
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电动势在电源内部是由负极指向正极，端电压在电压外部是有正极指向负极。准确地说电压是没有方向的。它是个标量，只有正负之分。
在电源内部，非静电力把正电荷从负极板移到正极板时要对电荷做功，这个做功的物理过程是产生电源电动势的本质
所以在电源内部是由负极指向正极，电源端是由正极指向负极。
内部是由扶到正，外部是+到— 刚好反向
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绛旓細鐢靛帇鐨勯噺鍊肩瓑浜庝袱鐐归棿鐨鐢典綅宸锛屾暟瀛﹁〃杈句负 U = W/Q锛屽叾涓 W 鏄數鍦哄姏鍋氱殑鍔燂紝鍗曚綅鏄劍鑰(J)锛孮 鏄Щ鍔ㄧ殑鐢佃嵎閲忥紝鍗曚綅鏄簱浠(C)銆傜數鍘嬬殑鍗曚綅鏄紡鐗(V)銆傚湪鐢靛帇鐨勫畾涔変腑锛屾垜浠瀹氬叾鏂瑰悜涓虹敱楂樼數浣嶆寚鍚戜綆鐢典綅锛屽嵆鐢典綅闄嶇殑鏂瑰悜銆鐢靛姩鍔锛岀畝绉扮數鍔匡紝鏄寚鍦鐢垫簮鍐呴儴锛屽皢鍗曚綅姝ｇ數鑽蜂粠璐熸瀬绉诲姩鍒版鏋...
绛旓細C)銆鐢靛姩鍔鐨勮〃杈惧紡涓 E = W_non-electro / Q锛屽叾涓 E 琛ㄧず鐢靛姩鍔匡紝鍗曚綅涔熸槸浼忕壒(V)锛沇_non-electro 琛ㄧず鐢垫簮鍐呴儴闈炵數鍦哄姏鍋氱殑鍔燂紝鍗曚綅鏄劍鑰(J)銆3. 鏂瑰悜瑙勫畾锛鐢靛帇鐨勬鏂瑰悜瀹氫箟涓轰粠楂樼數浣嶆寚鍚戜綆鐢典綅锛屽嵆鐢典綅闄嶄綆鐨勬柟鍚戙傜數鍔ㄥ娍鐨勬鏂瑰悜鍒欏畾涔変负浠庝綆鐢典綅鎸囧悜楂樼數浣嶏紝鍗崇數浣嶅崌楂樼殑鏂瑰悜銆
绛旓細鐢垫簮鐢靛姩鍔垮拰鐢垫簮鐢靛帇鏂瑰悜鐩稿弽锛屽ぇ灏忕數鍔ㄥ娍澶э紝鍥犱负瑕佸噺鍘诲鐢佃矾涓婄殑鍘嬮檷锛屽紑璺椂澶у皬涓鏍凤紝浣嗗疄闄呬腑鐢靛姩鍔胯澶т簬鐢靛帇锛屼綘涓嶅彲鑳戒笉浣跨敤锛屽彧瑕佷綘鏈夌數鍘嬪氨涓瀹氱數鍔ㄥ娍澶т簬鐢靛帇銆
绛旓細鐢靛姩鍔夸笌鐢靛帇鐨勫尯鍒 1. 鎬ц川涓嶅悓锛氱數鍘嬫槸鐢佃矾涓袱鐐逛箣闂寸殑鐢靛娍宸锛屾槸涓涓浉瀵瑰硷紝闇瑕佹湁鍙傝冪偣浣滄瘮杈冿紝鍏跺ぇ灏忎緷璧栦簬閫夋嫨鐨勯浂鐢典綅鐐癸紱鑰岀數鍔ㄥ娍鏄弿杩鐢垫簮鍐呴儴闈為潤鐢靛姏鎺ㄥ姩鐢佃嵎绉诲姩鐨勭墿鐞嗛噺锛屾槸涓涓粷瀵瑰硷紝琛ㄥ緛鐢垫簮鏈韩鐨勭壒鎬с2. 鏂瑰悜涓嶅悓锛氱數鍘嬬殑鏂瑰悜鍙互鏍规嵁闇瑕佽瀹氫负姝ｆ垨璐燂紱鑰岀數鍔ㄥ娍鐨勬柟鍚戞槸鍥哄畾...
