วิธีการคำนวณ Capacitance
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Capacitance measures an electrical component's ability to store charge. It's defined as the ratio of stored charge to the applied voltage, determining how much electrical energy a capacitor can hold.
สูตร
The calculator uses C = ε × A / d to find capacitance in farads
- C
- ε × A / d to find capacitance in farads — ε × A / d to find capacitance in farads
- A
- A value — Variable used in the calculation
คำแนะนำทีละขั้นตอน
- 1Enter the permittivity of the dielectric material, plate area, and plate separation
- 2The calculator uses C = ε × A / d to find capacitance in farads
- 3Results show stored charge capacity for various voltage levels
ตัวอย่างที่มีคำตอบ
อินพุต
A = 100 cm², d = 1 mm, ε = ε₀
ผลลัพธ์
C ≈ 88.5 pF
Using air dielectric
ข้อผิดพลาดที่ควรหลีกเลี่ยง
- ✕Mixing unit systems (cm vs m) in plate area and separation calculations
- ✕Forgetting that capacitors block DC current in steady state
คำถามที่พบบ่อย
What does increasing plate area do?
Larger plate area increases capacitance because it provides more surface for charge storage.
How does the dielectric material affect capacitance?
A dielectric's permittivity increases capacitance; materials like ceramic or plastic enhance charge storage compared to air.
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