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physics

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A capacitor has a capacitance of 3 pF. What potential difference would be required to store a charge of 21 pC?
Choose one answer.
a. 3 V
b. 21 V
c. 7 V
d. 0.14 V

  • physics - ,

    C=q/V

    V=q/C=21E-9/3E-9=7volts

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