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Gravitation — NEET Physics MCQs

30 questions written by hand against the NCERT chapter. Every wrong option is explained, not just the right one.

30questions
10/14/6easy / medium / hard
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Sample questions from this chapter

What does Kepler's first law state about a planet's orbit?
  1. It is an ellipse with the Sun at one focus ✓
  2. It is a circle with the Sun at its centre
  3. It is an ellipse with the Sun at the geometric centre
  4. It is a parabola with the Sun at the vertex
Answer: A. Kepler's law of orbits places each planet on an ellipse with the Sun at one focus.
Why not B: A circle is only a special limiting ellipse and is not Kepler's general orbit law.
Why not C: The Sun occupies one focus, not the midpoint of an elliptical orbit.
Why not D: A bound planet follows a closed ellipse rather than an open parabolic path.
Two point masses attract with force F. If only their separation is doubled, what is the new force?
  1. 2F
  2. F/2
  3. F/4 ✓
  4. 4F
Answer: C. Since F∝1/r², replacing r by 2r gives F'=F/2²=F/4.
Why not A: This treats force as directly proportional to separation rather than inversely proportional to its square.
Why not B: This applies an inverse-first-power law and misses the square of the doubled distance.
Why not D: This reverses the inverse-square dependence and makes force grow with separation.
A planet's perihelion distance is one-fourth its aphelion distance. If its aphelion speed is 10.0 km s⁻¹, what is its perihelion speed?
  1. 40.0 km s⁻¹ ✓
  2. 20.0 km s⁻¹
  3. 10.0 km s⁻¹
  4. 2.50 km s⁻¹
Answer: A. At perihelion and aphelion velocity is transverse, so r_pv_p=r_av_a and v_p=4×10.0=40.0 km s⁻¹.
Why not B: This uses the square root of the distance ratio rather than angular-momentum conservation.
Why not C: Equal speeds would sweep unequal areas during equal intervals at the two apsides.
Why not D: This makes speed directly proportional to orbital radius instead of inversely proportional at the apsides.

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Read the chapter first

Every NCERT question in this chapter is solved, free: NCERT solutions — Gravitation →

Other NEET Physics chapters

Units and MeasurementMotion in a Straight LineMotion in a PlaneLaws of MotionWork Energy and PowerSystems of Particles and Rotational Motion

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Questions

How many NEET questions are there on Gravitation?

This chapter test has 30 questions — 10 easy, 14 medium and 6 hard — all written against the NCERT Class 11 chapter.

Is this NEET Physics chapter test free?

Yes. Every chapter test is free with no login, and you get your all-India rank on every one. Nothing on the site is on sale right now.

Do the questions explain the wrong options?

Yes — every distractor carries its own explanation naming the specific misconception that makes a student pick it. That is the part most question banks skip, and it is the part that changes your next attempt.