STANDARDPhysics-Current Electricity
STANDARD Physics Potential Difference MCQ Question
Type: MCQ-numerical-Hard-Class 12
A circuit has a section ABC as shown in figure. If the potentials at points A, B and C are V₁, V₂ and V₃ respectively. The potential at point O is
A
V₁ + V₂ + V₃
B
V₁/R₁ + V₂/R₂ + V₃/R₃
C
zero
D
[V₁/R₁, V₂/R₂, V₃/R₃](R₁ + R₂ + R₃)
Correct Answer
Option B
Detailed Explanation
Using the junction rule and Ohm's law, the potential at point O can be calculated by balancing the currents through resistances R₁, R₂, and R₃. The correct expression is V₀ = V₁/R₁ + V₂/R₂ + V₃/R₃.
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