NEET 2018 Question Paper Mock Test

The moment of the force, $\vec{F}=4\hat{i}+5\hat{j}-6\hat{k}$ at $(2,0,-3)$, about the point $(2,-2,-2)$, is given by:

A student measured the diameter of a small steel ball using a screw gauge of least count $0.001\text{cm}$. The main scale reading is $5\text{mm}$ and zero of circular scale division coincides with $25$ divisions above the reference level. If screw gauge has a zero error of $-0.004\text{cm}$, the correct diameter of the ball is:

A solid sphere is rotating freely about its symmetry axis in free space. The radius of the sphere is increased keeping its mass same. Which of the following physical quantities would remain constant for the sphere?

The kinetic energies of a planet in an elliptical orbit about the Sun, at positions A, B and C are $K_A,K_B$ and $K_C$, respectively. AC is the major axis and SB is perpendicular to AC at the position of the Sun S. Position A is closest to the Sun (perihelion) and C is furthest (aphelion). Then:

If the mass of the Sun were ten times smaller and the universal gravitational constant ($G$) were ten times larger in magnitude, which of the following is not correct?