1 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
2 For a thermometer to have high sensitivity, it should have: A A narrow bore and a large bulb B A wide bore and a small bulb C A long stem and a small bulb D A thick glass wall and a wide bore
3 What is the main cause of gas pressure? A Collisions of gas particles with the walls of the container B Attraction between gas particles C The weight of the gas particles only D The colour of the gas
4 Linearity of a thermometer means that: A Equal temperature changes produce equal changes in the length of the liquid column B The liquid expands at a constant rate only near 0 °C C The thermometer can measure any temperature without error D The bore of the capillary is always straight
5 Which of the following is the SI unit of temperature? A Celsius (°C) B Fahrenheit (°F) C Kelvin (K) D Joule (J)
6 The elastic limit of a material is the point beyond which: A The material breaks B The material shows plastic deformation C The material becomes perfectly elastic D Hooke's law is still obeyed
7 According to the kinetic molecular theory, what is the main difference between the particles of a solid and a gas? A Solid particles are stationary, while gas particles move freely. B Solid particles vibrate about fixed positions, while gas particles move randomly at high speeds. C Solid particles are larger than gas particles. D Solid particles have no kinetic energy, while gas particles do.
8 A liquid is stored in a container. The pressure at a depth h in the liquid is given by P = hρg. If the depth is doubled, what happens to the pressure? A It becomes half B It doubles C It remains the same D It becomes four times
9 The range of a thermometer is: A The smallest temperature change it can detect B The difference between its highest and lowest measurable temperatures C The length of the capillary tube D The time it takes to reach thermal equilibrium
10 Brownian motion is the random movement of: A Small particles suspended in a fluid B Only gas molecules in a vacuum C Large solid blocks D Thermometer liquid in a capillary
11 The irregular random motion of smoke particles in air is due to: A Diffusion of smoke particles only B Brownian motion caused by air molecules C Convection currents D Gravity
13 What is meant by the sensitivity of a thermometer? A The smallest temperature change it can detect B The highest temperature it can measure C The size of its bulb D The length of its stem
14 Which liquid is commonly used in thermometers because of its wide range and visibility? A Water B Mercury C Alcohol D Kerosene
15 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
16 A clinical thermometer usually has a constriction in its capillary tube. What is the main purpose of this constriction? A To make the thermometer more sensitive B To prevent the liquid from falling back immediately after reading C To increase the range of the thermometer D To make the thermometer cheaper
17 A U-tube manometer is connected to a gas supply. The liquid level in the limb open to the atmosphere is higher than the level in the limb connected to the gas. This indicates that: A The gas pressure is equal to atmospheric pressure B The gas pressure is less than atmospheric pressure C The gas pressure is greater than atmospheric pressure D The gas pressure is zero
18 What happens to the pressure at a point in a liquid as the depth increases? A It decreases B It remains the same C It increases D It becomes zero
19 Which property of a material allows it to return to its original shape after the applied force is removed? A Plastic deformation B Elastic deformation C Breaking point D Yield point
20 The pressure exerted by a solid block on a surface can be increased by: A Increasing the area of contact B Decreasing the area of contact C Reducing the force D Making the surface smoother
21 As we go to higher altitudes, atmospheric pressure: A Increases B Decreases C Remains the same D First increases then decreases
22 The transfer of heat due to the actual movement of molecules is called: A Conduction B Convection C Radiation D Diffusion
23 According to Pascal's law, when pressure is applied to a liquid enclosed in a container, the pressure is transmitted: A Only in the direction of the applied force B Equally in all directions C Only upward D Only downward
24 A clinical thermometer is designed with a narrow constriction (kink) in the capillary. What is the main purpose of this constriction? A To make the thermometer more sensitive to small temperature changes B To prevent the liquid column from falling back when the thermometer is removed from the patient C To increase the range of the thermometer beyond 42°C D To make the thermometer easier to read in poor light
25 The pressure exerted by a liquid depends on: A depth and density of the liquid B shape of the container C volume of the liquid only D area of the container bottom only