# Questions tagged [potential]

Scalar and vector potentials in electromagnetism. The scalar potential is potential energy per unit charge. For potential energy, use the potential-energy tag.

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### Electrostatic potential of a line charge? [closed]

The answer is C, But I don't know the concept or the method that is used to solve this problem. Could someone explain the concept in order to solve this type of problem?
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### density and inertial mass

Water's density at 60-degree Fahrenheit is 62.366 pounds/ft^3. Is it inertial or gravitational mass? Actually, I am trying to calculate Potential Energy (PE) of 1 gallon of water at 1' height. Is PE = ...
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### Is this a good description for potential energy?

The potential energy can be seen as the energy stored in a system that can be "expelled". An object at a height $h$ above its reference point has a potential energy given by $U_{gravitational} = mgh$. ...
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### Assumptions in the equation Electric Potential ($V$)=$-\int\vec{E}\cdot d\vec{l}$

Electric Potential: $V=-\int\vec{E}\cdot d\vec{l}$ In this definition, do we have inbuilt assumption that test charge that we are moving is +ve and movement is against the field. Because depending ...
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### Potential and Field for a sphere with a central core of differing density [closed]

A spherically symmetric planet of radius $a$ consists of a central core of radius $b(<a)$ of uniform density $\rho_1$ surrounded by an outer region of uniform density $\rho_2$. Obtain an expression ...
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### Final potential difference between plates of capacitor [closed]

If the plates of a parallel plate capacitor are given charges 4Q and -2Q . The capacitor is then connected across an uncharged capacitor of the same capacitance as first one (=C) . Now we have to find ...
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