Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
Olympiad workbookNSEPElectrostatics

A small positively charged ball of mass m is suspended by a long insulating thread of negligible mass. Other positively charged small ball is moved very slowly from a large distance (along horizontal direction) until it is at original position A of first ball. As a result the first ball rises by h to position B such that h / . Choose the correct statement (s)

Options

  1. AElectrostatic energy of system of charges is 2 mgh .
  2. BTotal work done on system to bring two balls in their final position is mgh.
  3. CTotal work done on the system to bring two balls in their final position is 3 mgh .
  4. DWork done on system to bring two balls in their final position does not depend on the magnitude of charges exp

Correct answer

D. Work done on system to bring two balls in their final position does not depend on the magnitude of charges exp

Step-by-step solution

No Solution

Practice Electrostatics on Quantrex Academy →

More from Electrostatics

Two particles of masses m₁ and m₂ carry identical charges. Starting from rest they are accelerated through the same potential difference. Then they enter into a region of uniform mThe breakdown field for air is about 2 10^6 volt / m . Therefore, the maximum charge that can be placed on a sphere of diameter 10 cm isA uniform spherical charge distribution of radius R produces electric fields E ₁ and E ₂ at two points at distances r₁ and r₂ respectively from the centre of the distribution. Out A charge q is situated at the origin. Let E _ A , E _ B and E _ C be the electric fields at the points A (2,-3,-1), B (-1,-2,4) and C (2,-4,1) . Therefore,A cylinder on whose surfaces there is a vertical electric field of varying magnitude as shown. The electric field is uniform on the top surface as well as on the bottom surface. ThAn electron is injected directly towards the centre of a large metal plate having a uniform surface charge density of -2.0 10⁻⁶ C / m ^2 . The initial kinetic energy of the electroAn isolated metallic object is charged in vacuum to a potential V₀ using a suitable source, its electrostatic energy being W₀ . It is then disconnected from the source and immersedAcidified water from certain reservoir kept at a potential V falls in the form of small droplets each of radius r through a hole into a hollow conducting sphere of radius a . The s Full Electrostatics list All Olympiad workbook PYQs