XI Phy SRM Gr.1

Which is not the fundamental unit in CGS system

• meter

• centimeter

• gram

• second

Which is the fundamental unit in MKSA system?

• curie

• ampere

• foot

• radian

Once the unit of length ‘meter’ was defined as follows: 1/10⁷ of distance between North pole and the equator along the meridian passing through Paris’. The definition was removed because --------.

• the definition is not clear

• the value given by this definition is not constant

• the value given by this definition is very high

• the prototype cannot be made from this definition

The unit of mass in SI system is measured using -------.

• platinum-iridium alloy

• water

• Planck’s constant

• velocity of light in vacuum

Which system of units has supplementary units?

• FPS system

• CGS system

• MKSA system

• SI system

Out of following instruments, which one is least accurate?

• Vernier caliper

• screw gauge

• Spherometer

• Travelling microscope

Monomolecular layer method can measure a distance up to -------.

• mm

• $\mu m$

• nm

• cm

1500” = -------‘.

• 25

• 3000

• 15

• 30

Using parallax method -------.

• distance of a star can be measured accurately

• distance of the plane Pluto can be measured accurately

• distance of the Sun can be measured accurately

• distance of a spaceship can be measured accurately

Angular diameter method is suitable to measure the size of -------.

• nearby planet

• far away planet

• a neutron star

• a galaxy