A sphere of radius $1\,cm$ has potential of $8000\,V$, then energy density near its surface will be
A sphere of radius $1\,cm$ has potential of $8000\,V$, then energy density near its surface will be
- A
$64 \times {10^5}\,J/{m^3}$
- B
$8 \times {10^3}\,J/{m^3}$
- C
$32\,J/{m^3}$
- D
$2.83\,J/{m^3}$
Similar Questions
A fully charged capacitor has a capacitance $‘C’$. It is discharged through a small coil of resistance wire embedded in a thermally insulated block of specific heat capacity $‘s’$ and mass $‘m’$. If the temperature of the block is raised by ‘$\Delta T$’, the potential difference $‘V’$ across the capacitance is
A fully charged capacitor has a capacitance $‘C’$. It is discharged through a small coil of resistance wire embedded in a thermally insulated block of specific heat capacity $‘s’$ and mass $‘m’$. If the temperature of the block is raised by ‘$\Delta T$’, the potential difference $‘V’$ across the capacitance is
- [AIEEE 2005]
A parallel plate capacitor of capacity ${C_0}$ is charged to a potential ${V_0}$
$(i)$ The energy stored in the capacitor when the battery is disconnected and the separation is doubled ${E_1}$
$(ii)$ The energy stored in the capacitor when the charging battery is kept connected and the separation between the capacitor plates is doubled is ${E_2}.$
Then ${E_1}/{E_2}$ value is
A parallel plate capacitor of capacity ${C_0}$ is charged to a potential ${V_0}$
$(i)$ The energy stored in the capacitor when the battery is disconnected and the separation is doubled ${E_1}$
$(ii)$ The energy stored in the capacitor when the charging battery is kept connected and the separation between the capacitor plates is doubled is ${E_2}.$
Then ${E_1}/{E_2}$ value is
In a uniform electric field, a cube of side $1\ cm$ is placed. The total energy stored in the cube is $8.85\mu J$ . The electric field is parallel to four of the faces of the cube. The electric flux through any one of the remaining two faces is.
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A condenser has a capacity $2\,\mu \,F$ and is charged to a voltage of $50\, V$. The energy stored is
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Three identical capacitors are combined differently. For the same voltage to each combination, the one that stores the greatest energy is
Three identical capacitors are combined differently. For the same voltage to each combination, the one that stores the greatest energy is