Concept:
Properties of electric field lines:
• Direction is defined for a positive test charge
• Field lines start from positive charge and end on negative charge
• They never form closed loops (unlike magnetic field lines)
Step 1: Check each statement.
(A) True:
\[
\vec{F} = q\vec{E}
\]
For negative charge, force is opposite to field direction.
(B) True:
Tangent to field line gives direction of electric field.
(C) True:
If lines intersect, there would be two directions at a point, which is impossible.
(D) False:
Electric field lines do NOT form closed loops; they begin and end on charges.
Step 2: Conclusion.
\[
\text{Incorrect statement is (D)}
\]