Using power formulas for series and parallel combinations, the ratio of power consumed by R₁ and R₂ is 1/4. Correct answer: (a) 1/4. Class 12th Science Physics NCERT MCQ Questions NCERT Books MCQ Questions Session 2024-2025.
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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.
The Wheatstone bridge is balanced since all four arms have equal resistance R. The galvanometer arm also has resistance R. The equivalent resistance of the entire network simplifies to R, using series-parallel reduction. Hence, the correct answer is (a) R.
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 ...