6盏12w灯和一盏72w哪个亮？ 板载天线的阻抗是什么意思？资料上写的50欧，为什么我买的无线...
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6盏12w的亮，光的反射原理。
绛旓細涓鐩72W鐨勪寒锛6鐩12W鍜屼竴鐩72W铏界劧鐡︽暟鐩稿悓锛屼絾鏄12W鐨勭伅鍏夋瘮杈冩殫锛屽氨鏄釜鏁板涔熸槸鏆楀厜锛岀摝鏁拌秺楂樼伅鍏夎秺浜紝鎵浠ヤ竴鐩72W鐨勪寒銆
绛旓細涓鑸潵璇达紝鑺傝兘鐏28鐡﹀乏鍙崇殑鍏夋晥(鑰1鐡︾數鎵鍙戝嚭鐨勫厜)鏈楂橈紝闅忕摝鏁板澶с佸噺灏忥紝鍏夋晥閮戒細涓嬮檷銆30鐡﹁妭鑳界伅锛屽厜鏁堜竴鑸负65娴佹槑/鐡︼紝灏辨槸璇ョ伅鑳藉彂鍑1950娴佹槑鐨勫厜銆5鐡﹁妭鑳界伅锛屽厜鏁堜竴鑸负55娴佹槑/鐡︼紝灏辨槸6涓伅鑳藉彂鍑1650娴佹槑鐨勫厜銆備綘椁愬巺闈㈢Н3骞虫柟宸﹀彸锛屾槸瀹跺涵椁愬巺锛岀敤1涓5鐡︾殑灏卞浜嗐傚鏋滐紝椁愬巺闈...
绛旓細鐪嬩綘鐢电伅鐨勫姛鐜囥傜幇鍦ㄧ殑鑺傝兘鐏紝鍙兘10-20鐡﹀氨寰堜寒浜嗐傛瘡鍗冪摝灏忔椂涓1搴︾數锛岀幇鍦ㄧ殑甯傛皯鐢ㄧ數澶х害鏄0.5鍏冨涓鐐广涓鐩鍔熺巼15鐡︾殑鐢电伅锛岀偣6涓皬鏃讹紝鐩稿綋浜庣敤鎺0.09搴︾數锛屽ぇ绾5鍒嗗閽便
绛旓細10骞虫柟宸﹀彸鐨勮瘽锛屼竴鑸琇ED瑁20W宸﹀彸宸笉澶氱殑锛屾寜鐓т綘杩欐牱鐨勮瘽锛屼竴澶3W锛屼袱澶6W锛岄偅灏辨槸涓鐩鐏渶瑕6W锛岃冻澶熶寒浜
绛旓細鍔熺巼12鐡︾殑鐏涓涓皬鏃惰楃數0.012搴︺傚洜涓簗1000鐡︽椂涓1搴︾數锛屾墍浠12鐡﹂櫎浠1000鐡︽椂绛変簬0.012搴︾數 12鐡ED灏勭伅鎸夌収姣忔櫄鐐逛寒N灏忔椂璁＄畻锛屽叿浣撹绠楀叕寮忎负锛氱敤鐢甸噺(搴)锛濆姛鐜(鍗冪摝)脳浣跨敤鏃堕棿(灏忔椂)锛1搴︼紳1鍗冪摝路鏃 鍗筹紝鐢ㄧ數閲(搴)=12/1000*N 12鐡ed灏勭伅姣忓害鐢靛彲宸ヤ綔83.3灏忔椂锛 1. 1搴︾數...
绛旓細妤间笂涓や綅閮介敊浜!鍏跺疄浣犱拱鐨勮妭鑳界伅36W,瀹為檯鍔熺巼20W閮戒笉鍒!鏈汉浠庝簨鑺傝兘鐏噰璐骞!鎵浠ワ細5涓埧闂 x 20鐡 x 12灏忔椂=1200wH=1.2KWH=1.2搴︾數
绛旓細1搴︾數灏辨槸1000鐡﹀皬鏃讹紝200鐡*5灏忔椂锛1000鐡﹀皬鏃讹紝锛屽懙鍛碉紝绛旀灏辨槸5灏忔椂浜嗗摕銆傘15骞虫柟绫崇殑鎴块棿锛屽缓璁敤涓鐩7鐡︾殑鑺傝兘鐏氨琛岋紝鎴栬呯敤涓ょ洀5鐡︾殑涔熷彲銆傘傜浉褰撲簬60鐡︾殑鐧界偨鐏簡锛侊紒
绛旓細L1:U=12V P=12W I=P/U=1A R=U/I=12惟 L2:U鈥=12V P鈥=6W I鈥=P鈥/U鈥=0.5A R鈥=U鈥/I鈥=24惟 涓茶仈,鐢垫祦涓篒鈥欌=0.5A,鐢垫簮鐢靛帇U鈥=I鈥樷欙紙R+R鈥橈級=0.5锛12+24锛=18V 鐢佃矾鎬诲姛鐜 P鈥=I鈥淯鈥=0.5X18=9W
绛旓細鐪嬩綘鐢电伅鐨勫姛鐜囥傜幇鍦ㄧ殑鑺傝兘鐏紝鍙兘10-20鐡﹀氨寰堜寒浜嗐傛瘡鍗冪摝灏忔椂涓1搴︾數锛岀幇鍦ㄧ殑甯傛皯鐢ㄧ數澶х害鏄0.5鍏冨涓鐐广涓鐩鍔熺巼15鐡︾殑鐢电伅锛岀偣6涓皬鏃讹紝鐩稿綋浜庣敤鎺0.09搴︾數锛屽ぇ绾5鍒嗗閽便
绛旓細涓鐩鐏湁鐐逛寒鍜岀唲鐏袱绉嶆儏鍐碉紝涓ょ洀鐏湁2脳2=2²=4绉嶆儏鍐碉紝涓夌洀鐏湁2脳2脳2=2鏉庤姵=8绉嶆儏鍐碉紝鍙鎵惧嚭2鐨勪箻鏂瑰ぇ浜50鍗冲彲瑙ｇ瓟锛庤В锛2鐨5娆℃柟=32锛2鐨6娆℃柟=64锛64锛50锛屾墍浠ヨ嚦灏戣瀹夎6鐩鐏紟鏁呯瓟妗堜负锛6锛
