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CISCEISC (Science) ISC Class 12
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Syllabus

Capacitors and Capacitance

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Topics

  • Capacitance
  • Redistribution of charges and concept of common potential
  • Capacitance of an isolated spherical conductor
  • Capacitor
  • Principle of a capacitor
  • Types of capacitor
    1) Parallel plate capacitor
    2) Spherical capacitor
    3) Cylindrical capacitor
  • Applications of capacitors
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Video Tutorials

We have provided more than 1 series of video tutorials for some topics to help you get a better understanding of the topic.

Series 1


Series 2


Shaalaa.com | Capacitor and Capacitance part 1 (Introduction)

Shaalaa.com


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Shaalaa.com


Capacitor and Capacitance part 1 (Introduction) [00:14:03]
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Series: 1
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Capacitor and Capacitance part 1 (Introduction)
00:14:03  undefined
apacitor and Capacitance part 2 (Behaviour of Conductor in Electric Field)
00:14:26  undefined
Capacitor and Capacitance part 3 (Behaviour of Conductor in Electric Field)
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Capacitor and Capacitance part 4 (Electrical Shielding)
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Capacitor and Capacitance part 5 (Electrical capacitance)
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Capacitor and Capacitance part 6 (How capacitor Works)
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Capacitor and Capacitance part 13 (Numericals)
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Capacitor and Capacitance part 14 (Numericals)
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Capacitor and Capacitance part 16 (Equivalent Capacitance)
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Capacitor and Capacitance part 17 (Numericals :- Equivalent Capacitance)
00:13:41  undefined
Capacitor and Capacitance part 18 (Numericals :- Equivalent Capacitance)
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Capacitor and Capacitance part 22 (Problem: Wheatstone Bridge Numericals)
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Capacitor and Capacitance part 23 (Kirchoff Law)
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Capacitor and Capacitance part 24 (Numericals)
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Capacitor and Capacitance part 25 (Numericals)
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Capacitor and Capacitance part 26 (Open Circuit Problem)
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Capacitor and Capacitance part 27 (Infinite Capacitor problems)
00:11:54  undefined

Related QuestionsVIEW ALL [126]

Read the following paragraph and answer the questions.

A capacitor is a system of two conductors separated by an insulator. The two conductors have equal and opposite charges with a potential difference between them. The capacitance of a capacitor depends on the geometrical configuration (shape, size and separation) of the system and also on the nature of the insulator separating the two conductors. They are used to store charges. Like resistors, capacitors can be arranged in series or parallel or a combination of both to obtain the desired value of capacitance.
  1. Find the equivalent capacitance between points A and B in the given diagram.
  2. A dielectric slab is inserted between the plates of the parallel plate capacitor. The electric field between the plates decreases. Explain.
  3. A capacitor A of capacitance C, having charge Q is connected across another uncharged capacitor B of capacitance 2C. Find an expression for (a) the potential difference across the combination and (b) the charge lost by capacitor A.
    OR
    Two slabs of dielectric constants 2K and K fill the space between the plates of a parallel plate capacitor of plate area A and plate separation d as shown in the figure. Find an expression for the capacitance of the system.
     

For the given capacitor configuration

  1. Find the charges on each capacitor
  2. potential difference across them
  3. energy stored in each capacitor.

A 5⋅0 µF capacitor is charged to 12 V. The positive plate of this capacitor is now connected to the negative terminal of a 12 V battery and vice versa. Calculate the heat developed in the connecting wires.

Suppose, one wishes to construct a 1⋅0 farad capacitor using circular discs. If the separation between the discs be kept at 1⋅0 mm, what would be the radius of the discs?

Two plates A and B of a parallel plate capacitor are arranged in such a way, that the area of each plate is S = 5 × 10-3 m 2 and distance between them is d = 8.85 mm. Plate A has a positive charge q1 = 10-10 C and Plate B has charge q2 = + 2 × 10-10 C. Then the charge induced on the plate B due to the plate A be - (....... × 10-11 )C

Capacitors P and Q have identical cross-sectional areas A and separation d. The space between the capacitors is filled with a dielectric of dielectric constant Er as shown in the figure. Calculate the capacitance of capacitors P and Q.

Define capacitor reactance. Write its S.I units.

The displacement current of 4.425 µA is developed in the space between the plates of the parallel plate capacitor when voltage is changing at a rate of 106 Vs-1. The area of each plate of the capacitor is 40 cm2. The distance between each plate of the capacitor is x × 10-3 m. The value of x is ______.

(Permittivity of free space, ε0 = 8.85 × 10-12C2N-1m-2).

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