Physical Quantities

IMPORTANT

Physical Quantities: Overview

This topic covers concepts, such as, Physical Quantity, Physical Quantity as Ratios & Fundamental and Derived Quantities etc.

Important Questions on Physical Quantities

MEDIUM
IMPORTANT

What is the relative magnetic Permeability of aluminium? μA= 1.256× 10-6 H/m , μ0= 1.257 ×10-6 H/m.

HARD
IMPORTANT

What is relative electric permittivity in glass, if permittivity of glass is εg=3.7×10-12?

permittivity of vacuum ε0= 8.85×10-12.

 

MEDIUM
IMPORTANT

Find the relative quantity of the substance x.

Density of x = 300 kg/m3 And reference density = 200 kg/m3.

EASY
IMPORTANT

m3 is an example of fundamental units.

MEDIUM
IMPORTANT

Consider a particle moving along the positive direction of X-axis. The velocity of the particle is given by v=αx (α is a positive constant). At time t=0, if the particle is located at x=0, the time dependence of the velocity and the acceleration of the particle are respectively.

EASY
IMPORTANT

Which of the following pairs of physical quantities have the same dimension?

EASY
IMPORTANT

The quantity which can be measured is known as a physical quantity. They have a numerical magnitude and a unit.

EASY
IMPORTANT

Why length, mass and time are chosen as base quantities in mechanics?

MEDIUM
IMPORTANT

Write the fundamental unit of amount of substance.

MEDIUM
IMPORTANT

Write the fundamental unit of electric current.

EASY
IMPORTANT

A vehicle moving with a speed of 18 km h-1covers _____ m in 1 s

 

Note:In stating numerical answers, take care of significant figures.

MEDIUM
IMPORTANT

The fundamental unit of mass is kilogram which is the mass of a platinum-iridium cylinder kept at the International Bureau of Weights and Measures near Paris in France.

EASY
IMPORTANT

The quantity which can be measured is known as a physical quantity. They have a numerical magnitude and a unit.

EASY
IMPORTANT

Second is an example of fundamental units.

EASY
IMPORTANT

Time is an example of fundamental quantities.

EASY
IMPORTANT

Select the derived unit from the options.

EASY
IMPORTANT

Select the fundamental unit from the options.

EASY
IMPORTANT

Select the derived quantity from the options.

EASY
IMPORTANT

Select the fundamental quantity from the options.

EASY
IMPORTANT

According to metric system, how many fundamental units are there?