WB JEE 2019 | Units & Measurements Question 12 | Physics

WB JEE 2019

MCQ (Single Correct Answer)

-0.25

The density of the material of a cube can be estimated by measuring its mass and the length of one of its sides. If the maximum error in the measurement of mass and length are 0.3% and 0.2% respectively, the maximum error in the estimation of the density of the cube is approximately

1.1%

0.5%

0.9%

0.7%

WB JEE 2018

MCQ (Single Correct Answer)

-0.25

A spherical liquid drop is placed on a horizontal plane. A small distance causes the volume of the drop to oscillate. The time period of oscillation (T) of the liquid drop depends on radius (r) of the drop, density ($$\rho $$) and surface tension (S) of th liquid. Which among the following will be a possible expression for T (where, k is a dimensionless constant)?

$$k\sqrt {{{\rho r} \over S}} $$

$$k\sqrt {{{{\rho ^2}r} \over S}} $$

$$k\sqrt {{{\rho {r^3}} \over S}} $$

$$k\sqrt {{{\rho {r^3}} \over {{S^2}}}} $$

WB JEE 2017

MCQ (Single Correct Answer)

-0.25

The dimension of the universal constant of gravitation, G is

$$[M{L^2}{T^{ - 1}}]$$

$$[{M^{ - 1}}{L^3}{T^{ - 2}}]$$

$$[{M^{ - 1}}{L^2}{T^{ - 2}}]$$

$$[M{L^3}{T^{ - 2}}]$$

WB JEE Subjects