CHAPTER 1 : INTRODUCTION TO PHYSICS

Reinforcement Chapter 1

Part A :Objective Question

1.   Which of the following is a base SI  

       quantity?

      A   Weight                         B    Energy      

      C   Velocity                        D         Mass

     

2.         Which of the following is a derived

      quantity?

     A   Length              B    Mass                                             C  Temperature            D  Voltage       

                       

3.         Which of the following is not a basic

       unit?

      A   Newton                        B          kilogram                                   C         ampere                         D  second

     

4.         Which of the following quantities

      cannot be derived?

      A   Electric current B    Power                                C         Momentum                   D   Force

5.   Which of the following quantities is not derived from the basic physical quantity of length?    

      A   Electric charge  B    Density        C       Velocity                                    D         Volume

6.         Initial velocity u, final velocity v,

time t and another physical quantity k is related by the equation        v - u = kt.    The unit for k is

            A         m s^-1                             B    m^-1 s                                  C         m s^-2                       D   m² s^-2

 

7.   Which of the following has the smallest magnitude? 

     A   megametre                    B          centimetre                       C       kilometre                 D              mikrometre

8.         4 328 000 000 mm in standard form is

            A         4.328 x 10^-9 m  B          4.328 x 10^-6 m              C         4.328 x 10⁶ m  D         4.328 x 10⁹ m

9.  Which of the following measurements is the longest?

            A         1.2 x 10^-5 cm    B          120 x 10^-4 dm               C         0.12 mm                       D         1.2 x 10^-11 km

10. The diameter of a particle is 250 mm. What is its diameter in cm?

      A   2.5 x 10^-2                    B          2.5 x 10^-4                     C         2.5 x 10^-6                     D         2.5 x 10^-8

11. Which of the following prefixes is arranged in ascending order?

            A         mili, senti, mikro, desi                                                    B          mikro, mili, senti, desi

            C         mili, mikro, desi, senti                                                    D         desi, mikro, mili, senti

12.       Velocity, density, force and energy are

            A         basic quantities  

B    scalar quantities           

C  derived quantities         

D   vector quantities           

13.       Which of the following shows the

correct conversion of units?

            A         24 mm³            =2.4 x 10^-6 m³                                      B          300 mm³=3.0 x 10^-7 m³

      C   800 mm³=8.0 x 10^-2 m³                                                D         1 000 mm³=1.0 x 10^-4 m³

14. Which of the following measurements is the shortest ?

            A         3.45 x 10³ m               

B    3.45 x 10⁴ cm              

C   3.45 x 10⁷ mm             

D  3.45 x 10¹² mm

15. The Hitz FM channel broadcasts radio waves at a frequency of  92.8 MHz in the north region. What is the frequency of the radio wave in Hz?

A   9.28 x 10⁴                                B          9.28 x 10⁵                 C            9.28 x 10⁷                                D         9.28 x 10¹⁰

16. An object moves along a straight line for time, t. The  length of the line, s is given by the equation . The SI unit of g is

      A   m² s²          B   m s^-2          

      C   s^-1               D   s^-2 m