A 30-µF capacitor is charged to 40 V and then connected across an initially uncharged µF capacitor. What is the final-20 potential difference across the 30-uF ?сараcitor اخترأحد الخيارات а. 18 V b. 24 V c. 21 V d. 15 V e. 40 V

A 30-µF capacitor is charged to 40 V and then connected across an initially uncharged µF capacitor. What is the final-20 potential difference across the 30-uF ?сараcitor اخترأحد الخيارات а. 18 V b. 24 V c. 21 V d. 15 V e. 40 V

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter20: Electric Potential And Capacitance

Section: Chapter Questions

Problem 43P

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(i) A battery is attached to several different capacitors connected in parallel. Which of the following statements is true? (a) All capacitors have the same charge, and the equivalent capacitance is greater than the capacitance of any of the capacitors in the group, (b) The capacitor with the largest capacitance carries the smallest charge, (c) The potential difference across each capacitor is the same, and the equivalent capacitance is greater than any of the capacitors in the group. (d) The capacitor with the smallest capacitance carries the largest charge. (e) The potential differences across the capacitors are the same only if the capacitances are the same, (ii) The capacitors are reconnected in series, and the combination is again connected to the battery. From the same choices, choose the one that is true.
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(a) When a 9.00-V battery is connected to the plates of a capacitor, it stores a charge of 27.0 C. What is the value of the capacitance? (b) If the same capacitor is connected to a 12.0-V battery, what charge is stored?
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