Phy – Quarter 3

1

In solids, particles are:

A far apart and move randomly B closely packed and vibrate about fixed positions C free to move throughout the container D not moving at all

2

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

3

An aneroid barometer is used to measure:

A Relative humidity B Atmospheric pressure C Wind speed D Temperature

4

In a hydraulic press, the area of the small piston is 0.02 m² and the area of the large piston is 0.50 m². If a force of 100 N is applied to the small piston, what force is exerted by the large piston?

A 500 N B 1000 N C 2500 N D 5000 N

5

Which scale of temperature is also known as the absolute scale?

A Celsius B Fahrenheit C Kelvin D Reaumur

6

Stress is defined as:

A Force per unit area B Force per unit length C Extension per unit length D Area per unit force

7

Which scale of temperature is based on absolute zero?

A Celsius B Fahrenheit C Kelvin D Rankine

8

Which thermometer is most suitable for measuring the body temperature of a patient?

A Clinical thermometer B Laboratory thermometer C Digital thermometer D Both A and C

9

A block floats in water with some part above the surface. Which statement is true?

A The density of the block is greater than the density of water. B The density of the block is equal to the density of water. C The density of the block is less than the density of water. D The block has no weight.

10

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

11

Which liquid is most commonly used in a liquid-in-glass thermometer because of its suitable properties?

A Water B Mercury C Alcohol D Kerosene

12

Two identical eggs are placed in two beakers. Beaker A contains pure water and beaker B contains a strong salt solution. The egg floats in beaker B because:

A The egg becomes lighter in salt solution B The density of salt solution is greater than the density of the egg C The salt solution has lower pressure D The egg absorbs salt and expands

13

The SI unit of pressure is:

A Newton B Pascal C Joule D Watt

14

Pascal's law states that pressure applied to an enclosed liquid is:

A Transmitted equally in all directions B Transmitted only downward C Transmitted only upward D Not transmitted at all

15

The linearity of a thermometer means that:

A It measures temperature in a straight line. B Its reading changes uniformly with temperature. C It can measure only linear temperatures. D It has a straight capillary tube.

16

In a hydraulic brake system, the force applied at the pedal is transmitted to the brake shoes through:

A Air B Brake fluid C Water D Steam

17

Which liquid is commonly used in liquid-in-glass thermometers because it does not wet the glass?

A Water B Mercury C Alcohol D Kerosene

18

A clinical thermometer usually has a small constriction near the bulb. What is its purpose?

A To increase the range of the thermometer B To prevent the mercury from falling back immediately after reading C To make the thermometer more sensitive to small temperature changes D To allow the mercury to expand more quickly

19

Which of the following is NOT a fixed point used to calibrate a thermometer?

A Melting point of ice B Boiling point of water C Freezing point of mercury D Triple point of water

20

What is the SI unit of pressure?

A Newton B Pascal C Joule D Watt

21

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

22

As we go to higher altitude, atmospheric pressure:

A Increases B Decreases C Remains the same D First increases then decreases

23

Which of the following is true about heat and temperature?

A Heat is a measure of average kinetic energy, temperature is energy transferred. B Heat is energy transferred due to temperature difference, temperature is a measure of average kinetic energy. C Heat and temperature are the same thing. D Temperature is measured in joules, heat in kelvin.

24

The density of a substance is defined as:

A Mass per unit volume B Volume per unit mass C Weight per unit volume D Force per unit area

25

The linearity of a thermometer means that its reading changes:

A in proportion to the temperature change B randomly with temperature C only at high temperatures D only at low temperatures