enEnglishguગુજરાતી
NEET · Physics · STD 11 - 7. gravitation
Imagine earth to be a solid sphece of mass \(M\) and radius \(R\). If the value of acceleration due to gravity at a depth d below earth's surface is same as its value at a height \(h\) above its surface and equal to \(\frac{g}{4}\) (where \(g\) is the value of acceleration due to gravity on the surface of earth), the ratio of \(\frac{h}{d}\) will be
- A \(\frac{4}{3}\)
- B \(\;\frac{3}{2}\)
- C \(\;\frac{2}{3}\)
- D \(1\)
Answer & Solution
Correct Answer
(A) \(\frac{4}{3}\)
Step-by-step Solution
Detailed explanation
\(\Rightarrow g(h)=\frac{g}{\left(1+\frac{h}{R}\right)^2}\) \(\therefore \frac{g}{4}=\frac{g}{\left(1+\frac{h}{R}\right)^2}\)
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- \({ }_{82}^{290} X \xrightarrow{\alpha} Y \xrightarrow{e^{+}} Z \xrightarrow{\beta^{-}} P \xrightarrow{e^{-}} Q\) In the nuclear emission stated above, the mass number and atomic number of the product \(Q\) respectively, areNEET 2024 Medium
- A parallel beam of light of wavelength \(\lambda\) is incident normally on a single slit of width \(d\). Diffraction bands are obtained on a screen placed at a distance \(D\) from the slit. The second dark band from the central bright band will be at a distance given byNEET 2017 Easy
- An object flying in alr with velocity \((20 \hat{\mathrm{i}}+25 \hat{\mathrm{j}}-12 \hat{\mathrm{k}})\) suddenly breaks in two pleces whose masses are in the ratio \(1: 5 .\) The smaller mass flies off with a velocity \((100 \hat{\mathrm{i}}+35 \hat{\mathrm{j}}+8 \hat{\mathrm{k}}) .\) The velocity of larger piece will beNEET 2019 Medium
- The moment of inertia of a thin rod about an axis passing through its mid point and perpendicular to the rod is \(2400 \mathrm{~g} \mathrm{~cm}^2\). The length of the \(400 \mathrm{~g}\) rod is nearly:NEET 2024 Medium
- In a plane electromagnetic wave travelling in free space, the electric field component oscillates sinusoidally at a frequency of \(2.0 \times 10^{10}\,Hz\) and amplitude \(48\,Vm ^{-1}\). Then the amplitude of oscillating magnetic field is : (Speed of light in free space \(=3 \times 10^8\,m s ^{-1}\))NEET 2023 Easy
- Given below are two statements: Statement \(I\): Atoms are electrically neutral as they contain equal number of positive and negative charges. Statement \(II\): Atoms of each element are stable and emit their characteristic spectrum. In the light of the above statements, choose the most appropriate answer from the options given below.NEET 2024 Hard
More PYQs from NEET
- The element expected to form largest ion to achieve the nearest noble gas configuration isNEET 2023 Medium
- A \(12\,V,60\,W\) lamp is connected to the secondary of a step down transformer, whose primary is connected to ac mains of \(220\,V\). Assuming the transformer to be ideal, \(..........\,A\) is the current in the primary winding.NEET 2023 Easy
- Two point charges \(A\) and \(B\), having charges \(+Q\) and \(- Q\) respectively, are placed at certain distance apart and force acting between them is \(\mathrm{F}\). If \(25 \%\) charge of \(A\) is transferred to \(B\), then force between the charges becomesNEET 2019 Medium
- A uniform conducting wire of length \(12 \mathrm{a}\) and resistance \('R'\) is wound up as a current carrying coil in the shape of, \((i)\) an equilateral triangle of side \('a'.\) \((ii)\) a square of side \('a'.\) The magnetic dipole moments of the coil in each case respectively are:NEET 2021 Medium
- If an electron in a hydrogen atom jumps from the \(3^{rd}\) orbit to the \(2^{nd}\) orbit, it emits a photon of wavelength \(\lambda\). when it jumps from the \(4^{th}\) orbit to the \(3^{rd}\) orbit, the corresponding wavelength of the photon will beNEET 2016 Medium
- When copper is heated with conc. \(HNO_3\) it producesNEET 2016 Medium