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JEE Advanced 2009Paper 2
Exam
JEE Advanced
Year
2009
Paper
Paper 2
Subject
Physics
Chapter
Electrostatics

JEE Advanced 2009 · Paper 2 · Physics · Electrostatics

Under the influence of the coulomb field of charge +Q , a charge -q...

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

Options

  1. AThe angular momentum of the charge −q-q is constant
  2. BThe linear momentum of the charge −q-q is constant
  3. CThe angular velocity of the charge −q-q is constant
  4. DThe linear speed of the charge −q-q is constant

Correct answer

A. The angular momentum of the charge −q-q is constant

Step-by-step solution

Net torque on (−q(-q ) about a point (say PP ) lying over +Q+Q is zero. Therefore, angular momentum of (−q)(-q) about point PP should remain constant.
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