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26 August, 07:59

What is the energy stored on a capacitor which has stored charge of 15.0 mC (on each plate, opposite signs for each) and a voltage of 11e3 V?

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Answers (2)
  1. 26 August, 08:02
    0
    U = 82.5 J

    The energy stored on the capacitor is 82.5J

    Explanation:

    The energy stored in a capacitor U can be expressed as;

    U = 0.5CV^2 = Q^2/2C = QV/2

    Where,

    C = capacitance

    V = potential difference

    Q = charge on the plates

    Given;

    Q = 15 mC = 15*10^-3 C

    V = 11e3V = 11*10^3 V

    From;

    U = QV/2

    U = 15*10^-3 C * 11*10^3 V / 2

    U = 82.5 J

    The energy stored on the capacitor is 82.5J
  2. 26 August, 08:27
    0
    82.5 J

    Explanation:

    Energy stored on a capacitor = CV²/2

    But Q = CV

    Energy = QV/2

    Q = 15.0 mC = 0.015 C

    V = 11 * 10³ V = 11000 V

    Energy = 0.015 * 11000/2 = 82.5 J

    Therefore, the energy stored on a capacitor which has stored charge of 15.0 mC (on each plate, opposite signs for each) and a voltage of 11e3 V is 82.5 J
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