หน่วยที่-1-แบบฝึกหัดบทที่1

หนวยท่ี 1 แหลงกาํ เนิดไฟฟากระแสตรง (Direct Current Source) 25 แบบฝกd หัด หนวยที่ 1 แหลงกําเนดิ ไฟฟากระแสตรง (Direct Current Source) ……………………………………… คําสัง่ จงตอบคําถามและแสดงวิธที ําใหส2 มบูรณถ> ูกต2อง (15 นาที) 1. จงตอบคําถามตอไปน้ี (10 คะแนน) 1.1 ไฟฟาแบงได2 2 ชนิด คือ …………………………………………………………………………………..... 1.2 ไฟฟากระแสตรง คือ …………………………………………………………………………………............ ………………………………………………………………………………….....………………………………….…………………… ………………………….....………………………………………………………………………………………….…………………… 1.3 ไฟฟากระแสสลบั คือ …………………………………………………………………………………......... …………………………………….………………………………………………………………………………….....………………… ……………………………………………………………….....………………………………………………………………………… 1.4 แหลงกาํ เนดิ ไฟฟา หมายถึง …………………………………………………………………………………. ………………………………………………………………………………………………………………………......………………… ……………………………………………………………….....…………………………………………………………….…………… 1.5 แหลงกาํ เนิดไฟฟามี…………………ประเภท ……………………………………………………………. ………………………………………………………………………………….....……………………………………………………… ………………………….....……………………………………………………………………………………………………………… 1.6 การนาํ แทงอาํ พนั ถูกบั ผา2 ขนสัตว> จะทําให2เกิดเปMนแหลงกาํ เนิดไฟฟาชนดิ ………………… ………………….………………………………………………………………………………………………………………………….. 1.7 เซลล>ไฟฟาแบบปฐมภมู ิ หมายถึง ………………………………………………………………………… ………………….………………………………………………………………………………………………………………………….. 1.8 เซลลไ> ฟฟาชนิดอลั คาไลนม> ีข2อดีกวาเซลลไ> ฟฟาชนิดคาร>บอน-สงั กะสี คอื ………………….. ……………………….……………..……………………………………………………………………………………………………… 1.9 เซลล>ไฟฟาแบบทุติยภมู ิ หมายถงึ ………………………………………………………………………… ……………………………………..…………………….………………………………………………………….....………………… ……………………………………………………………….....………………………………………………………………………… 1.10 แบตเตอรี่สะสมไฟฟาแบบตะกว่ั -กรด มี ………. ชนดิ คือ ……………………………………. …………………………………………………………………………………………………………………………………………….. 2. จงแปลงหนวยปริมาณไฟฟา ตอไปน้ี (10 คะแนน) 2.1 155 000 000 Ω แปลงให2เปนM หนวยเมกกะโอห>ม มคี าเทากับ……………………………

หนวยท่ี 1 แหลงกําเนดิ ไฟฟากระแสตรง (Direct Current Source) 26 2.2 126 000 V แปลงให2เปนM หนวยเมกกะโวลต> มีคาเทากับ…………………………………………… 2.3 50 V แปลงให2เปMนหนวยกิโลโวลต> มีคาเทากับ…………………………………….……………….. 2.4 390 000 HZ แปลงใหเ2 ปนM หนวยกโิ ลเฮิร>ตซ> มีคาเทากับ…………………………….……………. 2.5 46 000 mA แปลงใหเ2 ปMนหนวยกโิ ลแอมแปร> มคี าเทากบั ………………………..……….……… 2.6 0.5 A แปลงให2เปนM หนวยมลิ ลิแอมแปร> มคี าเทากบั ………………………………………….……… 2.7 0.75 kV แปลงให2เปMนหนวยมิลลิโวลต> มีคาเทากับ…………………………………………….…… 2.8 0.000 012 W แปลงใหเ2 ปนM หนวยมลิ ลิวัตต> มีคาเทากบั ……………………………….…………. 2.9 0.000 006 A แปลงใหเ2 ปนM หนวยไมโครแอมแปร> มีคาเทากบั ………………………..………….. 2.10 0.05 mW แปลงใหเ2 ปนM หนวยไมโครวตั ต> มคี าเทากบั ………………………………………....... 3. จากรูปท่ี 1.32 จงคํานวณหาแรงดนั ไฟฟารวมและกระแสไฟฟารวม (5 คะแนน) รูปที่ 1.32 การตอเซลล>ไฟฟา สําหรบั แบบฝ—กหดั ข2อ 3 ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................

หนวยที่ 1 แหลงกําเนิดไฟฟากระแสตรง (Direct Current Source) 27 4. จากรูปท่ี 1.33 จงคาํ นวณหาคาแรงดันไฟฟารวมและคากระแสไฟฟารวม (5 คะแนน) รูปท่ี 1.33 การตอเซลล>ไฟฟา สาํ หรบั แบบฝก— หดั ข2อ 4 ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................

หนวยท่ี 1 แหลงกําเนดิ ไฟฟากระแสตรง (Direct Current Source) 28 5. จากรูปที่ 1.34 จงคาํ นวณหาคาแรงดนั ไฟฟารวมและคากระแสไฟฟารวมของวงจร (5 คะแนน) รปู ที่ 1.34 การตอเซลล>ไฟฟา สาํ หรบั แบบฝก— หัดข2อ 5 ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................