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  4. Figure shows three points A, B, and C in a region of uniform electric field E. The line AB is perpendicular and BC is parallel to the field I ires. Then which of the following holds good? where VA VB and VC represent the electric potentials at the points A, B and C respectively.

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Q. Figure shows three points A, B, and C in a region of uniform electric field E. The line AB is perpendicular and BC is parallel to the field I ires. Then which of the following holds good?
where $V_A \, V_B \, and \, V_C$ represent the electric potentials at the points A, B and C respectively.Physics Question Image

AFMCAFMC 2006Electrostatic Potential and Capacitance

Solution:

Electric lines of force constitute electric field. In an electric field electric lines of force always flow from higher potential to lower potential. Hence, A and B are at a same higher potential and Bis at lower potential. Thus, $ V_A = V_B > V_C$