多功能初中電學(xué)演示實(shí)驗(yàn)板

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7、n"DIV.MyFav_1252560526169 DIV.MsoFooterFONT-SIZE: 9pt; MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; FONT-FAMILY: "Times New Roman"DIV.MyFav_1252560526169 DIV.Section1page: Section1一、電路圖二、構(gòu)造圖從左到右分別為接線柱c、d、e和燈L2L1，從上到下分別為開關(guān)S2S1實(shí)驗(yàn)板圖 內(nèi)部線路圖1電源：220V交流電。2L1L2：普通照明燈泡。3c、d、e：接線柱。4S1：?jiǎn)蔚峨p擲開關(guān)；S2：

8、單刀單擲開關(guān)。三、用處該套實(shí)驗(yàn)板可進(jìn)展以下初中電學(xué)實(shí)驗(yàn)：1組成串聯(lián)、并聯(lián)電路。2導(dǎo)體和絕緣體的檢驗(yàn)。3玻璃在紅熾狀態(tài)下變成導(dǎo)體。4不同規(guī)格燈泡在串聯(lián)和并聯(lián)電路中亮度的比較。5用電器短路。6電源短路。7開關(guān)串接在火線上。四、使用方法一組成串聯(lián)、并聯(lián)電路。實(shí)驗(yàn)步驟：1串聯(lián)：用導(dǎo)線連接d、e接線柱；S1合a，S2斷開；將插頭插入220V交流電插座中。2并聯(lián)：用導(dǎo)線連接d、e接線柱；S1合b，S2閉合；將插頭插入220V交流電插座中。二導(dǎo)體和絕緣體的檢驗(yàn)。實(shí)驗(yàn)步驟：用導(dǎo)線連接c、d接線柱；S1合a，S2斷開；用導(dǎo)線將被檢驗(yàn)物體連接在d、e接線柱上；將插頭插入220V交流電插座中。三玻璃在紅熾狀態(tài)下變成

9、導(dǎo)體。實(shí)驗(yàn)步驟：用導(dǎo)線連接d、e接線柱；S1合a，S2斷開；將插頭插入220V交流電插座中；用酒精燈對(duì)壞燈L2敲掉玻璃殼的玻璃柱加熱，會(huì)發(fā)現(xiàn)燈L1很快亮起來(lái)，撤去酒精燈后，燈L1又會(huì)漸漸地暗下來(lái)直至熄滅。四不同規(guī)格燈泡在串聯(lián)和并聯(lián)電路中亮度的比較。實(shí)驗(yàn)步驟：略五用電器短路。實(shí)驗(yàn)步驟：1L1短路：用導(dǎo)線連接d、e接線柱；S1合a，S2斷開；將插頭插入220V交流電插座中；S2閉合。2L2短路：用導(dǎo)線連接d、e接線柱；S1合a，S2斷開；將插頭插入220V交流電插座中；用導(dǎo)線試觸c、d接線柱。六電源短路絕不允許。實(shí)驗(yàn)步驟：取下燈L1；將額定電流合適的保險(xiǎn)絲的一段嚴(yán)密地繞在卷緊的白紙上，并用導(dǎo)線將其連接在d、e接線柱上；將插頭插入220V交流電插座中