Explore BrainMass

Explore BrainMass

    Parallel plate capacitor

    Not what you're looking for? Search our solutions OR ask your own Custom question.

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    A parallel-plate capacitor is connected to a battery that maintains potential difference V between the plates. If the plates of the capacitor are pulled farther apart, do the following quantities increase, decrease, or remain the same?

    (a) Electric field between the plates;
    (b) charge on the plates;
    (c) capacitance;
    (d) energy stored in the capacitor.

    © BrainMass Inc. brainmass.com December 24, 2021, 5:02 pm ad1c9bdddf
    https://brainmass.com/physics/electric-magnetic-fields/parallel-plate-capacitor-23617

    SOLUTION This solution is FREE courtesy of BrainMass!

    In all these cases the battery is maintaining a constant voltage V. Increasing d decreases the capacitance as C = epsilon o A/d and epsilon o and A remain the same while d increases.

    (a) Electric field between the plates decreases

    Since E= V/d and V remains constant while d is increased E will decrease.

    (b) charge on the plates Q decreases

    Since the capacitance of a parallel-plate capacitor is given by the equation C = epsilon o A/d, increasing the separation d decreases the capacitance. With a smaller value of C and a constant value for V, the charge Q = CV will decrease.

    (c) capacitance decreases

    Since the capacitance of a parallel-plate capacitor is given by the equation C = epsilon o A/d, increasing the separation d decreases the capacitance.

    (d) energy stored in the capacitor decreases

    Energy = ½ Q V. Since V remains the same and Q decreases energy decreases.

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    © BrainMass Inc. brainmass.com December 24, 2021, 5:02 pm ad1c9bdddf>
    https://brainmass.com/physics/electric-magnetic-fields/parallel-plate-capacitor-23617

    ADVERTISEMENT