Electric Field & Field Lines
Identify the correct statements:
A. Electrostatic field lines form closed loops.
B. The electric field lines point radially outward when charge is greater than zero. C. The Gauss - Law is valid only for inverse-square force.
D. The work done in moving a charged particle in a static electric field around a closed path is zero. E. The motion of a particle under Coulomb's force must take place in a plane.
Choose the correct answer from the options given below:
Show answer and solution
Answer: (c)
- A: False, electrostatic field lines start and end on charges, so they never form closed loops.
- B: True, the field of a positive charge points radially outward.
- C: True, Gauss's law follows from the dependence of the force.
- D: True, the electrostatic field is conservative, so .
- E: True, the Coulomb force is central, so angular momentum is conserved and the motion stays in a plane.
- So the answer is (c) B, C, D, E only.