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Gravitation — NEET & JEE 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 and JEE 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 and JEE 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.