Capacitor Circuit Analysis & Charge Flow questions with solutions

Showing 1–10 of 39 questions

• MCQmediumCapacitorCapacitor Circuit Analysis & Charge Flow

  A capacitor of 2 μF is charged as shown in figure, and when switch S is shifted to position 2 the percentage energy dissipated is: [Diagram: Image]

  Options

  • Option A

    20%

  • Option B

    75%

  • Option C

    80%

  • Option D

    0%

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• MCQmediumCapacitorCapacitor Circuit Analysis & Charge Flow

  A battery is used to charged a parallel-plate capacitor, after which it is disconnected. Then the plates are pulled apart to twice their original separation. This process will double the :

  Options

  • Option A

    capacitance

  • Option B

    surface charge density on each plate

  • Option C

    stored energy

  • Option D

    electric field between the two plates

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• MCQmediumCapacitorCapacitor Circuit Analysis & Charge Flow

  In the shown circuit, the charge on the 6 μF capacitor is 10 μC. Find the charge on the 4 μF capacitor.

  

  Options

  • Option A

    40 μC

  • Option B

    10 μC

  • Option C

    20 μC

  • Option D

    30 μC

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• MCQmediumCapacitorCapacitor Circuit Analysis & Charge Flow

  Capacitances satisfy C₁ = 2C₂ = 2C₃. The potential differences across C₁, C₂ and C₃ are V₁, V₂ and V₃ respectively in the shown circuit. Which relation is correct?

  

  Options

  • Option A

    V₁ = V₂ = V₃

  • Option B

    V₁ = 2V₂ = 2V₃

  • Option C

    2V₁ = V₂ = V₃

  • Option D

    2V₁ = 2V₂ = V₃

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• Multi-correctmediumCapacitorCapacitor Circuit Analysis & Charge Flow

  In the circuit shown, C₂/C₁ = 4/3 and the terminal voltage of the battery at the left is V₀. The potentials of nodes 1, 2, 3, 4, 5 and 6 are in geometric progression. If the terminal voltage of the right battery is V in steady state, then:

  

  Select all that apply

  • Option A

    V may be V₀/3⁵

  • Option B

    V may be 3⁵V₀

  • Option C

    V may be V₀/4

  • Option D

    V cannot be concluded from the data

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• MCQmediumCapacitorCapacitor Circuit Analysis & Charge Flow

  A capacitor is connected to a battery. The force of attraction between the plates when the separation between them is halved

  Options

  • Option A

    remains the same

  • Option B

    becomes eight times

  • Option C

    becomes four times

  • Option D

    becomes two times

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• MCQmediumCapacitorCapacitor Circuit Analysis & Charge Flow

  In the shown circuit, find the ratio of charges on the 5 μF and 4 μF capacitors.

  

  Options

  • Option A

    4/5

  • Option B

    3/5

  • Option C

    3/8

  • Option D

    1/2

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• ParagraphmediumCapacitorCapacitor Circuit Analysis & Charge Flow

  Capacitors A and B of 3 µF and 2 µF are charged to 100 V and 180 V respectively and connected as shown, with one lead of each free. The upper plate of A is positive and the upper plate of B is negative. An uncharged 2 µF capacitor C falls across the free ends and completes the circuit. Answer the following.

  

  Sub-question 1

  Find the final charges on capacitors A, B and C.

  Options

  • Option A

    Qₐ = 90 µC, Qᵦ = 150 µC, Q꜀ = 210 µC

  • Option B

    Qₐ = 90 µC, Qᵦ = 210 µC, Q꜀ = 150 µC

  • Option C

    Qₐ = 150 µC, Qᵦ = 90 µC, Q꜀ = 210 µC

  • Option D

    Qₐ = 210 µC, Qᵦ = 150 µC, Q꜀ = 90 µC

  Sub-question 2

  Find the electrostatic energies before and after completion of the circuit.

  Options

  • Option A

    Uᵢ = 47.4 mJ, U𝒇 = 18 mJ

  • Option B

    Uᵢ = 18 mJ, U𝒇 = 47.4 mJ

  • Option C

    Uᵢ = 47.4 mJ, U𝒇 = 29.4 mJ

  • Option D

    Uᵢ = 18 mJ, U𝒇 = 18 mJ

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• NumericmediumCapacitorCapacitor Circuit Analysis & Charge Flow

  In the given network if potential difference between p and q is 2V and C₂ = 3C₁. Then find the potential difference between a and b.

  

  Your answer

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• MCQmediumCapacitorCapacitor Circuit Analysis & Charge Flow

  Both capacitors are initially uncharged and then connected as shown and switch is closed. What is the potential difference across the 3 µF capacitor ?

  

  Options

  • Option A

    30 V

  • Option B

    10 V

  • Option C

    25 V

  • Option D

    None of these

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