Skip to main content

Understanding Hooke's Law: The Foundation of Elasticity| Chapter 5 Physics 9th

HOOKE'S LAW   Introduction In physics, Hooke's Law is one of the fundamental principles governing how objects deform under external forces . Named after the 17th-century British physicist Robert Hooke, this law provides a crucial understanding of the behavior of elastic materials, such as springs and rubber bands. Whether stretching a rubber band or compressing a spring, Hooke's Law helps explain what happens when forces act on these materials. What is Hooke's Law: Hooke's Law states that the force F needed to extend or compress a spring by some distance x is proportional to that distance. Mathematically, it is expressed as: F= -kx Here k represents the spring constant, which is the measure of the stiffness of the spring, and x is the displacement from the displacement position.  The negative sign indicates that the force exerted by the spring is in the opposite direction of the displacement.  Understanding the Spring Constant: The spring constant k is a critical co...
Post a Comment

Physics Past Papers 2018 MUET

  

MEHRAN UNIVERSITY OF ENGINEERING AND TECHNOLOGY JAMSHOR PAST PAPER 2018 (PHYSICS)

1.     We can write 1 kilo as ________.

a.     106             b. 109               c. 103               d. 102

2.     In MKS System, the unit of pressure is

a.      Mm of Hg             b. Pascal                     c. Atmosphere             d. Dyne/m2

3.    If a vector is denoted by , then its x-component will be

a.    Asin                   b. Acos                    c. Acos                   d. Asin

4.    If i, j, k are the unit vectors, along x, y and z-axis then 

a.      1                            b. -                             c. -1                             d. 0

5.    The unit vector of a vector  of magnitude 2 is

a.      A2                          b. 2A                           c.                               d. 

6.     The mathematical form of Newton’s Second Law of Motion is

a.      m=                       b. m=aF                       c. F==                       d. m== 

7.     Elastic collision is  that collision during which

a.      Momentum remains conserved

b.     Energy remain constant

c.      Mass is conserved

d.     Both A and B

8.    When an object is thrown upward, making an angle  with the horizontal and move freely under the action of gravity is called

a.      Horizontal             b. Vertical                   c. Projectile                d. None of these

9.     The body is said to be in equilibrium, if sum of all the forces and torques equal to

a.      One                       b. zero                                    c. Equal                       d. Four

10.  The satellite remains in the orbit around the earth due to centripetal force provided by

a.      Gravitational Force of sun

b.     Gravitational force of the earth

c.      The rocket engine attached to the satellite

d.     None of above

11.  The force which is responsible for the motion of the planets around the sun

a.      Gravitational force     b. Centripetal force           c. Electrostatic force     d. N.O.T

12.  The field is said to be conservative field, if work done along the closed path is

a.      Positive                       b. Negative                       c. zero                         d. Maximum

13.  The SI unit of Energy is

a.      Calorie                        b. Joule                             c. slugs                        d. eV

 

14.  The S.I unit of the intensity of sound is

a.     Watt/m2               b. Erg/m2                                                      c. Joule/s2       d. Dyne/cm2.sec

15.  The distance between two consecutive nodes and antinodes is same or equal to

a.     Half of the wavelength

b.     Double of the wavelength

c.      One complete wavelength

d.     Three times the wavelength

16.  In Michelson interferometer wavelength of the light is given by

a.    d=mλ                     b. d=2mλ                                 c.              d. None of these

17.   The velocity of electromagnetic waves and the velocity of the light have ____ value.

a.      Different               b. Opposite                             c. Same           d. None of these

18.  The internal energy of the fixed mass of an ideal gas depend upon

a.      Pressure                b. Temperature                     c. Volume       d. None of these

19.  The charge which is used to produce an electric field

a.      Electric field         b. Field charge                                  c. Electric Intensity   d. Test charge

20.  The average velocity of an electron gained by the electrons in a conductor placed in an electric field is

a.     Variable velocity              b. Drift velocity                     c. Phase velocity    d. NOT

21.  Resistance of a conductor is directly proportional to the ----

a.      Length                              b. Cross-sectional area           c. Magnetic field   d. Diameter

22.  A transformer is used to

a.     Transform alternating voltage

b.     Convert DC to AC

c.      Convert AC to DC

d.     Convert mechanical energy to electrical energy

23.  The wheat stone-bridge is most sensitive when

a.     Ratio arm is equal to one

b.     Ratio arm is is equal to ten

c.      Both A &  B

d.     Any value

24.  A conductor is a substance, which contain ______ electrons.

a.     Electric                 b. Open                       c. Close                       d. Free                 

25.  A photoelectric cell works on the principle of the

a.     Compton effect     b. Photoelectric effect           c. Photo refraction    d. É£-rays counter                     

   

Labels:

Comments

Post a Comment

Popular posts from this blog

Xiling ISE v14.7 Download + Installation with Crack + License Configuration Error SOlution

 Xiling ISE Design Suit v14.7 Download and Installation With Crack Hello friends well come to my blog. In this blog post I will be guiding you about complete installation of Xiling ISE Design Suit Version 14.7 with Crack. Before installation turn off real time protection/ Windows defender and wifi otherwise software will not be installed properly. You can turn it on later after complete installation! First in order to download Xiling_ISE_v14.7 click the link below: Click to download Xilling ISE Design Suit v14.7      www.getintopc.com/xiling Download On click the above link you will navigate to this site named as Get Into PC. Step 1: Click Load more Get Into PC Website Interface for Xiling ISE download drag down and you will see a option Download full setup click on it. On clicking Download Full setup you'll navigate to following window: Get Into PC Download Xiling ISE Design Suit v14.7 Drag down and click  Download Full setup. Download Full Setup for Xiling ISE...
Post a Comment
Read more

Center of Mass or Center of Gravity and Couple | 9th Physics

 Center of Mass or Center of Gravity A body behaves as if its all mass is concentrated at one point called as Center of Mass or Center of Gravity. Even though earth attract every part of it.  Below figure shows center of masses of different shapes. Center of Mass of Irregular Shapes: In case of regular shapes it is easier to find the center of mass because of their structure, but can we find the center of mass of an irregular shape? Yes we can. Following are some steps to find the center of mass of the irregular shapes: Step 01: Make small holes on the edges of the irregular shapes.  Step 02: Suspend the irregular shape one whole retord stand. Step 03: Hung a plumb line or weight from the pin in front of irregular shape. Step 04: When plumb line is steady, trace the line on the irregular shape. Step 05: Repeat step 2-4 for second and third hole.   Couple: A couple is formed by two unlike forces of same magnitude but opposite in direction.  The torque produc...
Post a Comment
Read more

Chasing Dreams

  UNIT 3: EDUCATION AND CAREERS                                         CHASING DREAMS                                 CRITICAL SUMMARY Jameel entered his house in a gloomy mood. His father asked about his sad look. But he didn’t respond. As the family had finished the dinner, his mother again asked if there is any problem with him.   He replied the results of him and his sister Sara had been announced and they had passed with flying colors and now he is worried about his future studies. He told that as there was not any college in their village and the nearest one was in the city about 50 miles away, so he was upset about getting admission in any college.   He intended to become a doctor to serve the suffering humanity. Her mother suggested him that they could hire a horse c...
Post a Comment
Read more