A). A parallel plate capacitor is connected with a 1,964 volt battery and each p
ID: 1513017 • Letter: A
Question
A). A parallel plate capacitor is connected with a 1,964 volt battery and each plate contains 4,920 micro Coulomb charge. How much energy is stored in the capacitor?B). A certain capacitor stores 45 J of energy when it holds 2,947 uC of charge. What is the capacitance in nF?
A). A parallel plate capacitor is connected with a 1,964 volt battery and each plate contains 4,920 micro Coulomb charge. How much energy is stored in the capacitor?
B). A certain capacitor stores 45 J of energy when it holds 2,947 uC of charge. What is the capacitance in nF?
A parallel plate capacitor is connected with a 1,964 volt battery and each plate contains 4,920 micro Coulomb charge. How much energy is stored in the capacitor?
B). A certain capacitor stores 45 J of energy when it holds 2,947 uC of charge. What is the capacitance in nF?
B). A certain capacitor stores 45 J of energy when it holds 2,947 uC of charge. What is the capacitance in nF?
Explanation / Answer
(A)
Energy stored in the capacitor:
E = 1/2 Q V
= 0.5 * 4920 x 10^-6 * 1964
= 4.83 J (rounded to 3 SF )
(B)
Energy stored, E = Q^2 / 2C
Capacitance:
C = Q^2 / 2E
= (2947 x 10^-6 ) ^2 / ( 2 * 45 )
= 9.65 x 10^-8 F
= 96.5 nF
= 97 nF (rounded to 2 SF )
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