Advertisements
Advertisements
प्रश्न
What is meant by electrostatic energy density?
उत्तर
The energy stored per unit volume of space is defined electrostatic energy density.
`"U"_"E" = "U"/"Volume" = 1/2 ε_0 "E"^2`
where,
- U – electrostatic potential energy
- E – electric field
- £0 – permittivity of free space
APPEARS IN
संबंधित प्रश्न
Which charge configuration produces a uniform electric field?
Rank the electrostatic potential energies for the given system of charges in increasing order.
A thin conducting spherical shell of radius R has a charge Q which is uniformly distributed on its surface. The correct plot for electrostatic potential due to this spherical shell is
Two points A and B are maintained at a potential of 7 V and -4 V respectively. The work done in moving 50 electrons from A to B is ______.
Give the relation between electric field and electric potential.
Derive an expression for electrostatic potential due to a point charge.
Derive an expression for electrostatic potential energy of the dipole in a uniform electric field.
Draw the free body diagram for the following charges as shown in the following figure.
A spark plug in a bike or a car is used to ignite the air-fuel mixture in the engine. It consists of two electrodes separated by a gap of around 0.6 mm gap as shown in the figure.
To create the spark, an electric field of magnitude 3 x 106Vm-1 is required,
- What potential difference must be applied to produce the spark?
- If the gap is increased, does the potential difference increase, decrease or remains the same?
- Find the potential difference if the gap is 1 mm.
A point charge of +10 µC is placed at a distance of 20 cm from another identical point charge of +10 µC. A point charge of -2 µC is moved from point a to b as shown in the figure. Calculate the change in potential energy of the system? Interpret your result.
