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Gravitation — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysicsGravitation1 Mark
MCQ
A ring has a total mass M but non-uniformly distributed over its circumference. The radius of the ring is R. A point mass m is placed at the centre of the ring. Work done in taking away this point mass from centre to infinity is:
  • A
    $-\frac{\text{GMm}}{\text{R}}$
  • B
    $\frac{\text{GMm}}{\text{R}}$
  • C
    $-\frac{\text{GMm}}{2\text{R}}$
  • D
    $\frac{\text{GMm}}{\text{R}^2}$
✓

Answer

  1. $\frac{\text{GMm}}{\text{R}}$

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