如何识别电阻功率
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色环颜色代表的倍率：黑X1、棕X10、红X100、橙X1K、黄X10K、绿X100K、蓝X1M、紫X10M、灰X100M、白X1000M、金X0.1、银X0.01 色环颜色代表的误差等级：金5%、银10%、棕1%、红2%、绿0.5%、蓝0.25%、紫0.1%、灰0.05%、无色20% 四环电阻的读法：前2位数字是有效数字，第3位是倍率，第四位是误差等级。 例如：棕红黑金 12X1=12欧姆 误差正负5%
红红橙银 22X1K=22K 误差正负10%
黄紫黄金 47X10K=470K 误差正负5% 五环电阻的读法：前3位数字是有效数字，第四位是倍率，第五位是误差等级。 例如：棕红黑黑金 120X1=120欧姆 误差正负5%
棕红黑橙棕 120X1K=120K 误差正负1%
黑棕黑银灰 010X0.01=0.1 误差正负0.05% 六环电阻前五位按照五位色环电阻的读法读出来，第六环是温度系数。
看电阻的粗细 个头大小
电阻上有不同的颜色圈，黑的，大概表示100，通过不同的原色颜色全识别但可以查到，
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绛旓細灏辨槸鍏剁數娴佹瘮杈冨皬 浣跨敤榛樿鐨 1/8w 鍚﹀垯姣忎竴涓兘鏍囧楹荤儲 浣犲彲浠ョ畻涓涓嬬數娴侊紝涓鑸笉鍋氱壒娈婄敤閫旂殑 1/8 鎴 1/16 閮藉鐢
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绛旓細鐭ラ亾浜鐢甸樆鐨勫ぇ灏忥紝杩橀渶瑕佺煡閬撳姞鍦ㄧ數闃讳袱绔殑鐢靛帇鎴栬呮祦杩囪繖涓數闃荤殑鐢垫祦锛岀敤鍏紡P=(U*U)/R鎴栬呭叕寮廝=I*I*R鍗冲彲璁＄畻銆傛瘮濡備竴涓數闃绘槸100惟锛屽姞鍦ㄥ畠涓ょ鐨勭數鍘嬫槸8V锛岃繖涓數闃荤殑鍔熺巼灏遍渶瑕丳=(8*8锛/100=0.64W锛岄夋嫨1W鐢甸樆鍗冲彲銆傚張姣斿涓涓數闃绘槸1.2K惟锛屽凡鐭ユ祦杩囧畠鐨勭數娴佹槸50mA锛岃繖涓數闃...
绛旓細鍙互閫氳繃鐢甸樆鐨勬爣绀烘潵璁＄畻鎵鑳芥壙鍙楃殑鏈澶х數鍘嬨備緥濡傦紝涓鐢甸樆鏄10娆у锛2W锛屾牴鎹叕寮忥細鍔熺巼=鐢靛帇²/鐢甸樆 鍗 鐢靛帇=鈭氾紙鍔熺巼x鐢甸樆锛=鈭氾紙2x10锛=鈭20鈮4.5V 鍏舵剰涔夋槸锛氬綋杩欎釜10娆у鐨勭數闃昏楁暎10鐡﹀姛鐜囨椂锛屾柦鍔犲湪瀹冧袱绔殑鐢靛帇涓嶈兘瓒呰繃4.5V銆傛崲鍙ヨ瘽璇达紝鏂藉姞鍦10娆у鐢甸樆鐨勭數鍘嬩笉寰楄秴杩4.5V锛...
绛旓細浠庣函鐞嗚璁＄畻涓婄湅锛鐢甸樆鍔熺巼鐨勫ぇ灏忓鐢佃矾娌℃湁浠讳綍褰卞搷锛屽奖鍝嶇數璺殑鏄畠鐨勭數闃诲笺備絾鏄紝鍦ㄥ疄闄呭簲鐢ㄤ腑锛屽鏋滅數闃诲櫒鑷韩鐨勫姛鐜囧皬浜庡畠鎵鎵垮彈鐨勫姛鐜囷紝閭ｄ箞瀹冨皢浼氬墽鐑堝彂鐑屽紩璧峰彉璐紝鐢氳嚦琚儳鍧忋傜數闃讳笂鐨勭摝鏁版槸琛ㄧず璇ョ數闃昏兘澶熸壙鍙楃殑鏈澶у姛鐜囷紝瓒呰繃杩欎釜鍊肩數闃诲彲闈犳у氨澶уぇ闄嶄綆锛庨氳繃鐢甸樆鍊煎拰鐡︽暟鍊煎彲浠ョ煡閬...
绛旓細鐢甸樆锛屽湪鐢佃矾涓敤鏉ヨ〃绀虹數璺鐢垫祦闃荤浣滅敤鐨勫ぇ灏忋傛暟鍊间笂绛夌數鍘嬩笌鐢垫祦鐨勬瘮鍗宠憲鍚嶇殑娆у瀹氬緥锛歊锛漊锛廔 鐢甸樆鏄數璺熀鏈弬鏁颁箣涓銆鐢甸樆鍣鐨鍔熺巼琛ㄧず鐢甸樆鍏佽杩炵画宸ヤ綔鑳芥壙鍙楃殑鐢靛姛鐜囥備笌鐢甸樆鍊煎ぇ灏忔病鏈夌洿鎺ュ叧绯汇傜敱浜庣數娴佹祦杩囩數闃讳細浜х敓鐑噺銆傜儹閲忚繃楂樹細瀵艰嚧鐢甸樆鍣ㄦ崯鍧忋
