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Capacitor Circuits and Energy for GUJCET: 23 solved questions

Real GUJCET paper questions on capacitor circuits and energy, part of electric potential and capacitance. Each opens with the options, the correct answer and a step-by-step solution. Papers run from 2007 to 2023. No sign-in needed to read them.

What this topic asks

• Capacitor networks — 6 questions
• Series and parallel combinations — 6 questions
• Redistribution of charge — 5 questions
• Energy stored and energy density — 4 questions
• Battery connected or removed — 2 questions

All 23 questions with solutions

• Work done in placing a charge of 8×10⁻¹⁸ C on a capacitor of capacitance 800 μF is GUJCET 2007
• Equivalent capacitance between points X and Y in the given figure is GUJCET 2008
• A parallel plate capacitor having air as the dielectric medium is charged by a potential difference of V volt… GUJCET 2009
• Two capacitors of capacitance 2 μF and 4 μF respectively are connected in series. The combination is connecte… GUJCET 2009
• In the figure shown, the area of every plate is A, and the distance between adjacent plates is d. What is the… GUJCET 2013
• Ten identical square metallic plates are arranged as shown in the figure. The length of each plate is l. The… GUJCET 2016
• Energy of a charged capacitor is U. Now it is removed from the battery and then connected in parallel to anot… GUJCET 2016
• In the figure, the area of each plate is A and the distance between consecutive plates is as shown in the fig… GUJCET 2019
• A 2 μF capacitor is connected to a 50 V supply and a 3 μF capacitor is connected to a 100 V supply. Now, afte… GUJCET 2020
• Find the equivalent capacitance between the two points A and B for the given figure (electric circuit). [Capa… GUJCET 2021
• How will you connect four capacitors, each of capacitance 4 μF, to obtain an equivalent capacitance of 1.6 μF? GUJCET 2022
• Six identical square metallic plates are arranged as in the figure. The length of each plate is l (facing pla… GSEB Board July 2015
• 6 identical capacitors are joined in parallel and are charged with a battery of 10 V. Now the battery is remo… GSEB Board July 2016
• The area of every plate shown in the figure is A and the separation between successive plates is d. What is t… GSEB Board July 2017
• Energy of a charged capacitor is U. Now it is removed from the battery and then connected to another identica… GSEB Board July 2017
• The capacitance of a variable capacitor joined with a battery of 100 V is changed from 2 μF to 10 μF. What is… GSEB Board July 2017
• In an R–C circuit, when the charge on the plates of the capacitor is increasing, the energy obtained from the… GSEB Board July 2017
• Three capacitors of 2 pF, 3 pF and 4 pF are connected in parallel. What is the total capacitance of the netwo… GSEB Board March 2020
• Which of the following physical quantities has a unit the same as that of electric energy density? GSEB Board August 2020
• Two capacitors, when connected in series, have an equivalent capacitance of 3 μF, and when they are connected… GSEB Board March 2022
• When n capacitors, each of equal value C, are connected in series, the equivalent capacitance of the combinat… GSEB Board July 2022
• The energy of a charged capacitor is U. Now it is removed from the battery and then connected to two other id… GSEB Board March 2023
• A parallel plate capacitor is charged with a battery and then separated from it. Now if the distance between… RS Academy GUJCET booklet