Questions tagged [capacitance]
The ability of an object to store electric charge.
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How will the capacitance of a capacitor reduce when the distance between the plates is increased?
Now I know that if the potential difference between the plates increase that capacitance will reduce, but for that also I thought as the distance between the plates increases, the electric field ...
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Understanding dielectrics on the basis of induced charge and energy density
Simply, why is the energy density in a dielectric medium = $\frac{1}{2} K \epsilon_o E^2$?
For a simple case such as that of a capacitor with a dielectric medium inside it, to find the magnitude of ...
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Hi, I have a doubt in a question related to capacitors, can someone please check [closed]
a parallel plate capacitor is charged and then disconnected from the source of steady EMF. The plates are then drawn apart farther. Again it is connected to same source.
Then incorrect option is (And ...
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How can i find the amount of charge that "escaped" to ground in this conductors and capacitance question? [closed]
In the image, you have a plate capacitor, and in the space between its plate, a metallic material with charge $+Q$ is inserted.
the question asks how much charge will pass through each wire between ...
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How can I deduce a capacitance of a capacitor without existing formulaes?
Understanding Charge Accumulation in Capacitors Connected in Series
I've been exploring the behavior of capacitors connected in series and developing a conceptual model to understand how charge ...
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Maxwell stress tensor on a capacitor late given a dielectric
Given a capacitor with large plates (area $A$) separated by a dielectric with relative permittivity $\varepsilon_r$ and thickness $g$, I believe the Maxwell stress tensor states that the force on each ...
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Equivalent capacitance for a system of spherical capacitors
The question demands equivalent capacitance of two concentric metallic shells with larger and smaller radii. b and a respectively. The inner sphere is just left open(it's not earthed or anything), and ...
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Working of batteries and supply of charges through them when connected to capacitors
My doubt is not really related to capacitance but about the fundamentals of working of a battery.
A capacitor with certain capacitance is charged as shown in the figure.
Please note that battery is ...
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Growth of Current in an Inductor Connected Across a Battery [duplicate]
When baterry is connected across inductor with no resistance in circuit, won't the current flowing through it be zero, as inductor back emf will counteract the effect of potential difference due to ...
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Cannot catch a minus sign mistake when deriving the ODE for an LC circuit
It's probably a very basic question but I just cannot wrap my mind around it. I'll just try to derive the differential equation for an LC circuit:
According to the law of induction, in a solenoid we ...
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Using an imaginary conducting shell of infinite radius to calculate capacitance of a spherical conductor
This is a statement from Serway's Modern Physics which I don't understand. It tries to explain capaticance for a single conductor.
Imagine a single spherical charged conductor. The electric field ...
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Maximum voltage that a system of two capacitor withstands when connected in series [closed]
Question:
A capacitor of capacitance 1 micro faraday withstands the maximum voltage 6kV while a capacitor of 2 micro faraday withstands the maximum voltage 4kV. What maximum voltage will the system ...
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Surface charge density within a parallel plate capacitor on different voltages
I need a way to vary the surface charge density without changing the electric field. My idea is to use two large conducting parallel plates close to each other in vacuum enclosed in a grounded vessel (...
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Is the capacitance obtained using the RC circuit equation the correct value?
To find the dielectric constant of the dielectric according to frequency, an RC circuit was constructed and the capacitance was calculated using the RC circuit equation using the voltage applied to R, ...
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Electric field at any point in the region between two capacitors is proportional to the magnitude of charge on each conductor
This is a statement from Young and Freedman's University Physics Section 24.1 on Capacitors.
Suppose we have any two conductors with charges $-Q$ and $+Q$ on each charged with a battery. Then this ...