Physical world and measurement

The prefix for pico stands for

• 10^-9

• 10^-10

• 10^-12

Chandrashekhar limit is the largest practical unit of

• Length

• Mass

• Time

Which of the following is dimensional constant

• Relative density

• Gravitational constant

• Refractive index

Gross error can be minimised by

• Taking mean

• Repeating the experiment

• Careful observation

High precision instruments are used to eliminate

• Random error

• Instrumental error

• Least count error

Round off the number 43.752 upto three digit

• 43.8

• 43.7

• 43.76

What is the value of one light year

• 9.267x10^15 km

• 9.467x10^15 km

• 9.647x10^15 km

The numer of significant figures in 0.086230 is

• 4

• 5

• 6

The dimensional formula for acceleration due to gravity is

• [LT^-1]

• [LT^-2]

• [L^2T^-1]

Which method is used to find the distance between the Earth and the Sun?

• Triangulation method

• Parallax method

• RADAR method