The internal resistance of the cell is 0.5 Ω, calculated using Ohm’s law by equating EMF expressions for both resistor cases. Correct answer: (d). Class 12th Science Physics NCERT MCQ Questions NCERT Books MCQ Questions Session 2024-2025.

Since the conductor has a nonzero potential and there are no external charges, there must be charges present to maintain this potential. In electrostatic equilibrium, any excess charge on a conductor resides only on the surface, as the electric field ...

The correct answers are (b) and (c). In a region of constant potential, the electric field is zero because the electric field is the negative gradient of potential. Since potential is constant, its gradient is zero. Also, there can be ...

The correct answer is (c) decreases because the charge moves along the electric field. A positively charged particle in a uniform electric field experiences a force in the direction of the field. As it accelerates, its kinetic energy increases, causing ...

The correct answer is (a) spheres. At a great distance from a collection of charges with a nonzero net charge, the system behaves like a point charge. The equipotential surfaces around a point charge are spherical, since the electric potential ...