Physics
Senior High
จะหาจุดสะเทินและหาค่าศักย์ไฟฟ้ายังไง?
สอบแก้
1.
+2แC
E,
E.
+18แC
C
20 cm
-B
4.
20 cm
20 cm
-2แg/
4แC
A
B
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