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  4. This question has Statement-1 and Statement-2. Of the four choices given after the Statements, choose the one that best describes the two Statements. Statement 1: No work is required to be done to move a test charge between any two points on an equipotential surface. Statement 2: Electric lines of force at the equipotential surfaces are mutually perpendicular to each other.

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Q. This question has Statement-1 and Statement-2. Of the four choices given after the Statements, choose the one that best describes the two Statements.
Statement 1: No work is required to be done to move a test charge between any two points on an equipotential surface.
Statement 2: Electric lines of force at the equipotential surfaces are mutually perpendicular to each other.

JEE MainJEE Main 2013Electrostatic Potential and Capacitance

Solution:

The work done is moving a charge along an equipotential surface is always zero. The direction of electric field is perpendicular to the equipotential surface or lines.