Question # 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)

# 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)

(1) The angular momentum of the charge ( -q ) is constant

(2) The linear momentum of the charge ( -q ) is constant

(3) The angular velocity of the charge ( -q ) is constant

(4) The linear speed of the charge ( -q ) is constant

Solution

Angular momentum is constant derive from Kepler's law.