4 7 9. จากรูปต่อไปน้ีจงหาค่า Time period , frequency , Positive peak value , Negative peak value , และ Peak – to – peak value ของรูปคลื่น ........................................................................................................................................................................................... ........................................................................................................................................................................................... ........................................................................................................................................................................................... ........................................................................................................................................................................................... ........................................................................................................................................................................................... ........................................................................................................................................................................................... ........................................................................................................................................................................................... ........................................................................................................................................................................................... ........................................................................................................................................................................................... ........................................................................................................................................................................................... ........................................................................................................................................................................................... ........................................................................................................................................................................................... t (s) 3 6 9 12 18 12 6 0 – 6 V t (ms) 20 60 6 1 0 V t (ms) 5 24 12 0 V 40 – 12 10 15 20 25 30 35
4 8 10. จากรูปคลื่นไฟฟ้ากระแสสลบัจงคา นวณหาค่า a) เวลาที่ใชใ้นการกา เนิดรูปคลื่นใน 1 ไซเคิล b) ความถี่ของรูปคลื่น c) ค่าสูงสุดทางดา้นบวกของรูปคลื่น d) ค่าสูงสุดทางดา้นลบของรูปคลื่น e) ค่าพีค – ทู – พีค ของรูปคลื่น ........................................................................................................................................................................................... ........................................................................................................................................................................................... ........................................................................................................................................................................................... ........................................................................................................................................................................................... ........................................................................................................................................................................................... ........................................................................................................................................................................................... ........................................................................................................................................................................................... ........................................................................................................................................................................................... ........................................................................................................................................................................................... ........................................................................................................................................................................................... ........................................................................................................................................................................................... ........................................................................................................................................................................................... ........................................................................................................................................................................................... ........................................................................................................................................................................................... ........................................................................................................................................................................................... ........................................................................................................................................................................................... ........................................................................................................................................................................................... ........................................................................................................................................................................................... ........................................................................................................................................................................................... ........................................................................................................................................................................................... t (s) 12 4 2 4 6 8 10 12 14 –12 6 –6