Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
AP EAMCET2015PhysicsElectrostatics

Two point charges +8 C and +12 C repel each other with a force of 48 ~N . When an additional charge of -10 C is given to each of these charges (the distance between the charges is unaltered) then the new force is

Options

  1. Arepulsive force of 24 ~N
  2. Battractive force of 24 ~N
  3. Crepulsive force of 12 ~N
  4. Dattractiive force of 2 ~N

Correct answer

D. attractiive force of 2 ~N

Step-by-step solution

When an amount of charge =10 C is added to both of the charges then, these becomes aligned & q₁=-2 C and q₂=+2 C & F |q₁ q₂ | & F₁ |q₁ q₂ | and F₂ |q₁^1 q₂^1 | & and F₁ F₂ = q₁ q₂ q₁ q₂ 48 F₂ = 8 12 2 2 & F₂=2 ~N aligned

Practice Electrostatics on Quantrex Academy →

More from Electrostatics

A charge of 5 C is placed at the centre of a spherical shell S₁ of radius 10 cm. Now this system is enclosed inside another spherical shell S₂ of radius 20 cm. The ratio of the ele 2026Two point charges P = +25 C and Q = -16 C are placed 5 cm apart. Find the position of the point at which the resultant electric field is zero: 2026Bodies P, Q, R, S are labelled as having charges Q_P = 0.5 10⁻¹⁹C , Q_Q = 0.7 10⁻¹⁹C , Q_R = 2.1 10⁻¹⁹C , Q_S = 4.8 10⁻¹⁹C respectively. Select the body having the correct charge. 2026Uniform electric field of 5 10^3 ,NC⁻¹ is maintained in the positive Y direction. Now a point charge of 2 10⁻⁴C at rest is released from the origin. The kinetic energy attained by 2026A pith ball of mass 'm' gram and charge 'Q' is suspended using a mass less silk thread near a large charged conducting metal sheet of area 'A' and surface charged density ' '. If t 2026In a uniform electric field 10^6 N C⁻¹ an electric dipole of length 4 cm is placed with its axis making an angle 60^ with the electric field. If the dipole experiences a torque of 2026An electric field and magnetic field 1.8 10^4 Vm⁻¹ and 6 10⁻³ T respectively are applied simultaneously on an electron beam such that path of the beam remains undeviated, then the 2026A uniform electric field E = 3 i + 6 j + k passes through a closed cuboidal surface. One face of the cuboid has an area 4 m^2 and an outward unit normal given by 2 i +2 j +3 k 17 . 2026 Full Electrostatics list All AP EAMCET PYQs