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  4. Assertion A positive point charge initially at rest in a uniform electric field starts moving along electric lines of force. (Neglect all other forces except electric forces). Reason A point charge released from rest in an electric field always moves along the line of force.

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Q. Assertion A positive point charge initially at rest in a uniform electric field starts moving along electric lines of force. (Neglect all other forces except electric forces).
Reason A point charge released from rest in an electric field always moves along the line of force.

Electric Charges and Fields

Solution:

If the field lines are curved, then the charged particle follows the straight line path along the direction of tangent drawn to electric field lines at its starting point.