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The metallic spheres A and B of radii 2m and 4m respectively carry the same charge 4x10⁻⁸C. If the spheres are connected by a copper wire then:

Correct answer: A. The charge will flow from A to B

  • A. The charge will flow from A to B
  • B. The charge will flow from B to A
  • C. No flow of charge will occur
  • D. Both A and B are possible

Explanation

The potential of a sphere is V = kQ/r. Sphere A (smaller radius) has a higher initial potential than sphere B. Charge flows from a region of higher potential to lower potential, so charge will flow from A to B until their potentials are equal.

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About Electrostatics

Electrostatics describes forces between charges through Coulomb's law, electric fields and field intensity, then uses electric potential to measure energy per unit charge. Capacitors store charge and electrical energy, with capacitance depending on geometry and dielectric material, not simply on the amount of charge present.

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