Physics · 2020
JEE Main · 3 September 2020, Shift 2 · Q11
Concentric metallic hollow spheres of radii R and 4 R hold charges Q_1 and Q_2 respectively. Given that surface charge densities of the concentric…
Concentric metallic hollow spheres of radii R and $\displaystyle 4$ R hold charges $\displaystyle Q_1$ and $\displaystyle Q_2$ respectively. Given that surface charge densities of the concentric spheres are equal, the potential difference $\displaystyle V(R)-V(4 R)$ is :
Official answer
(2)
$\displaystyle \frac{3 \mathrm{Q}_1}{16 \pi \varepsilon_0 \mathrm{R}}$
More from Electrostatics
- The vehicles carrying inflammable fluids usually have metallic chains touching the ground:2024
- A point charge of +12 μ C is at a distance 6 cm vertically above the centre of a square of side 12 cm as shown in figure. The magnitude of the…2021
- An electron revolves around an infinite cylindrical wire having uniform linear charge density 2 × 10^-8 C m^-1 in circular path under the influence…2023
- Six point charges are kept 60^° apart from each other on the circumference of a circle of radius R as shown in figure. The net electric field at the…2026
- A particle of charge ' -q ' and mass ' m ' moves in a circle of radius ' r ' around an infinitely long line charge of linear charge density ' +λ '.…2024
- Given below are two statements: one is labelled as Assertion and the other is labelled as Reason (R). Assertion: Work done by electric field on…2024
- Ten charges are placed on the circumference of a circle of radius R with constant angular separation between successive charges. Alternate charges 1,…2020
- Consider two infinitely large plane parallel conducting plates as shown below. The plates are uniformly charged with a surface charge density +σ and…2025
JEE Main 2020 Physics question, with the answer from NTA’s final answer key. Where our answers come from.