logo
bettani-series-logo
  • Home
  • Books
  • About Us
  • Contact Us
  • Test

General Science Class 8th MCQs=682

Contents

  • Measurement of Physical Quantities                

  • The measurable things are called physical quantities.
  • Physical quantities are divides in to two categories. Base quantity and derived quantity.
  • Length, mass, Time, Temperature, Electric current, Amount of substance and intensity of light are seven base physical quantities in SI.
  • The quantity derived from base quantities are called derived quantities i.e. Volume, force, Power etc.
  • The comparison of something with some standard is known as measurement.
  • The standard with which things are compared is known as unit.
  • The unit of base quantity is called a base unit.
  • An international System employed to represent different quantities and their units is called International System of Unit.
  • Quantity                      Unit                             Symbol                                   
  • Length                          Meter                           m                                            
  • Mass                             Kilogram                      kg                                           
  • Time                             Second                         s                      
  • Temperature                  Kelvin                          K                                            
  • Electric Current             Ampere                        A                                
  • Intensity of light            Candela                       Cd                               
  • Amount of substance     Mole                            mol
  • Base unit of density (mass/volume) is Kgm-3.
  • The base unit of volume (length × width × height) is m3.
  • The base unit of Area (Length × width) is m2.
  • The standard meter is the length of platinum-iridium alloy metal rod, kept at 00C.

Prefix

Factor

Symbol

Prefix

Factor

Symbol

Deka

101

Da

Deci

10-1

D

Hecto

102

H

Centi

10-2

C

Kilo

103

K

Milli

10-3

M

Mega

106

M

Micro

10-6

M

Giga

109

G

Nano

10-9

N

Tera

1012

T

Pico

10-12

P

Peta

1015

P

Femto

10-15

F

Exa

1018

E

Atto

10-18

A

The comparison of something with some standard is known as………….
a) Measurement          
b) Scale                       
c) Quality                    
d) Quantity

a
please login to comment

The standard with which things are compared is known as………
a) Measurement                       
b) Scale                       
c) Quality                    
d) unit

d
please login to comment

Milli means…… NTS PST 15/12/2019 (11:30)
a) 10-3  
b) 10-2             
c) 10-1              
d) 106

a
please login to comment

A number with proper unit is known as……….
NTS Past -------CT Test
a) unit                         
b) magnitude
c) scale                        
d) none of these

b
please login to comment
Contents Details