CBSE XII Science Physics
A 900pF capacitor is charged by 100V battery.
i.How much electrostatic force is stored by the capacitor?
ii.The capacitor is disconnected from the battery and connected to another 900pF capacitor.What is the electrostatic energy stored by the system?
iii.Where has the remainder of the energy gone?
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CBSE XII Science Physics
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N spherical droplets , each of radius r have been charged to have a potential V each.If all these droplets were to coalece to form a single large drop what would be the potential of this large drop?
(Given taht the capacitance of a sphere of radius x equals 4pie absilon not Kx)
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CBSE XII Science Physics Electrostatic Potential and Capacitance
A parallel plate capacitor is charged by battery , which is disconnected. A dielectric slab is then inserted in the space between the plates. Explain what changes, if any occur in the values of
(i) Capacitance
(ii) Potential difference between the plates
(iii) The energy stored in the capacitor
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29th December 2017
8:10 PM
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CBSE XII Science Physics Electrostatic Potential and Capacitance
Two capacitors of unknown capacitance C1 C2 are connected first inseries and then in parallel acrooss a battery OF 100V.If the enenrgy stored in the two combination is 0.145J AND 0.25 J respectively determine thye value of C1 AND C2 .Also calculate the charge on each capacitance in parallel comboination?
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In this question I am not able to understand the (ii) part .I have a doubt that in the solution potential for capacitor Y is V/4.But I have studied that when a capacitor is connected to a battery then potential will be V=Vo (constant).So please tell me the solution.
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1st March 2018
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19th March 2018
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CBSE XII Science Physics
How can we identify NODES in a mixed or complex arrangement of CAPACITORS ? how to find CHARGE , POTENTIAL , CAPACITANCE on each capacitor ? Please give the explanation with the help of atleast 5 examples .
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13th May 2018
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CBSE XII Science Physics
In the circuit, shown in figure 'K' is open. The charge on capacitor C in steady state is q1. Now key is closed and at steady state, the charge on C is q2. The ratio of charges is
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CBSE XII Science Physics
what are the difference between alternating current and direct curent? and what are the use of transformers i.e step up and step down? what is capacitor what is its use ? what is self induction? what is mutual indution? what is a inductor? what is difference between inductor and capacitor?
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sir, when we insert a dielectric btw the capacitor plates at a constant voltage then there occurs increse in the charge on the capacitor plates then from where does this extra charge comes from?
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this is a question based on charge on capacitor in staedy state.
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Why don't we use metals as dielectric between capacitor even though the capacitance will increase by infinity as the dielectric constant for metals is infinity ?
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