1 The pressure at a depth h in a liquid of density ρ is given by: A P = hρg B P = h/ρg C P = ρg/h D P = hρ/g
4 A mercury barometer measures: A Liquid pressure B Atmospheric pressure C Gauge pressure D Density of mercury
5 A body will float in a liquid if its density is: A greater than the density of the liquid B equal to or less than the density of the liquid C always greater than 1000 kg/m³ D zero
6 An altimeter is an instrument used to measure: A Atmospheric pressure B Altitude C Liquid pressure D Density of a liquid
7 A mercury barometer is used to measure: A Liquid pressure in a container B Atmospheric pressure C Gauge pressure in a pipe D Density of a liquid
8 Pascal's law states that pressure applied to a confined liquid is transmitted: A Only in the direction of applied force B Only upwards C Equally in all directions D Only to the walls of the container
9 Pascal's law states that pressure applied to an enclosed liquid is transmitted: A only in the direction of the applied force B only upwards C equally in all directions D only to the bottom of the container
10 According to Hooke's law, the extension of an elastic spring is directly proportional to the applied force, provided that: A the elastic limit is not exceeded B the spring is made of metal C the force is applied slowly D the spring is kept horizontal
11 As we go to higher altitude, atmospheric pressure: A Increases B Decreases C Remains the same D First increases then decreases
12 Which instrument is used to measure atmospheric pressure? A Thermometer B Barometer C Manometer D Hydrometer
13 A hydraulic press is used to lift a heavy load. If the area of the small piston is 0.01 m² and the force applied is 100 N, what is the pressure transmitted through the liquid? A 1 Pa B 100 Pa C 10,000 Pa D 0.0001 Pa
14 An aneroid barometer is used to measure: A Relative humidity B Atmospheric pressure C Wind speed D Temperature
15 وہ حد جس کے بعد مادہ اپنی اصل شکل میں واپس نہیں آتا، کہلاتی ہے: A تناسب کی حد B لچک کی حد C پلاسٹک کی حد D ٹوٹنے کا مقام
16 The pressure at a depth h in a liquid of density ρ is given by P = hρg. If the depth is doubled, the pressure becomes: A Half B Double C Four times D Unchanged
17 According to Hooke's law, the extension of a spring is directly proportional to: A the applied force B the square of the applied force C the length of the spring D the material of the spring
18 In a mercury barometer, the height of the mercury column is measured from: A the top of the tube to the mercury level B the mercury level in the trough to the mercury level in the tube C the bottom of the tube to the trough D the open end of the tube to the closed end
19 Strain is defined as: A Change in length per unit original length B Force per unit area C Change in area per unit force D Force per unit length
21 As we go to higher altitudes, atmospheric pressure: A Increases B Decreases C Remains the same D First increases then decreases
22 Which of the following best describes elastic deformation? A The object does not return to its original shape after the force is removed. B The object returns to its original shape when the force is removed. C The object breaks into pieces when a force is applied. D The object permanently changes its volume.
23 The elastic limit of a material is the maximum stress beyond which: A The material returns to its original shape B The material shows permanent deformation C The material becomes a liquid D The material has zero density
24 A force of 50 N is applied to a spring that obeys Hooke's Law. If the spring constant is 200 N/m, what is the extension of the spring? A 0.25 m B 0.50 m C 2.50 m D 0.025 m
25 Pascal's law states that pressure applied to an enclosed liquid is transmitted equally in all directions. Which device works on Pascal's law? A Hydraulic press B Electric motor C Galvanometer D Telescope