Under the influence of the Coulomb field of charge `+Q`, a charge `-q` is moving around it in an elliptical orbit. Find out the correct statement(s).

Options

A. The angular momentum of the charge `-q` is constant
B. The linear momentum of the charge `-q` is constant
C. The angular velocity of the charge `-q` is constant
D. The linear speed of the charge `-q` is constant

Answer

A

Explanation

Since torque about central charge is zero angular momentum is conserved.