1. What is the unit of pressure in SI system?
a) Pascal
b) Dyne
c) Newton
d) Joule
Answer: a
2. Kilowatt is a unit of:
a) Work
b) Power
c) Electricity
d) Current
Answer: b
3. The rate at which work is done is called:
a) Energy
b) Power
c) Momentum
d) Impulse
Answer: b
4. One kilowatt-hour is equal to:
a) 3.6 Mega Joules
b) 3.8 Mega Joules
c) 3.2 Mega Joules
d) 4.0 Mega Joules
Answer: a
5. Which of the following quantities remain the same in all systems of units?
a) Acceleration due to gravity
b) Specific gravity
c) Pressure
d) Density
Answer: b
6. Which of the following is not a vector quantity?
a) Work
b) Force
c) Displacement
d) Velocity
Answer: a
7. Calorific value is measured in:
a) KN/kg
b) KJ/kg
c) KW/sec
d) KCal/sec
Answer: b
8. Energy in food is commonly measured in:
a) Kelvin
b) Joules
c) Calories
d) Celsius
Answer: c
9. The cleanest source of energy is:
a) Bio-fuel
b) Fossil fuel
c) Nuclear energy
d) Wind energy
Answer: d
10. Solar energy is converted into chemical energy during:
a) Transpiration
b) Photosynthesis
c) Diffusion
d) Osmosis
Answer: b
11. When an object falls from an aeroplane, what increases?
a) Kinetic energy
b) Mass
c) Acceleration
d) Potential energy
Answer: a
12. Which process causes the Sun to emit energy?
a) Nuclear fission
b) Nuclear fusion
c) Chemical reaction
d) Diffusion
Answer: b
13. What is the second largest global energy source after fossil fuels?
a) Nuclear energy
b) Renewable energy
c) Natural gas
d) None of the above
Answer: b
14. What type of energy is produced by a photovoltaic cell?
a) Light energy
b) Electrical energy
c) Chemical energy
d) Heat energy
Answer: b
15. Parsec is a unit of:
a) Distance
b) Time
c) Light intensity
d) Magnetic flux line
Answer: a
16. Kinetic energy depends on:
a) Velocity only
b) Mass only
c) Pressure
d) Both mass and velocity
Answer: d
17. In which of the following scenarios is kinetic energy being used to perform work?
a) Paddling a bicycle
b) Driving a car
c) Grinding wheat using a windmill
d) Rowing a boat
Answer: b
18. When is kinetic energy of a falling stone maximum?
a) Just after it is dropped
b) Halfway to the ground
c) Just before touching the ground
d) When it hits the ground
Answer: c
19. Which pair of physical quantities have the same dimensions?
a) Work and Energy
b) Force and Power
c) Work and Power
d) Power and Motion
Answer: a
20. Which of the following have the same unit?
a) Work and Power
b) Torque and Moment of Inertia
c) Work and Torque
d) Torque and Angular Momentum
Answer: c
Matching Type Questions
21. Match List-I with List-II:
| List-I (Quantity) | List-II (Unit) |
|---|---|
| A. Distance | 3. Light year |
| B. Amount of substance | 1. Mole |
| C. Electric charge | 2. Coulomb |
| D. Energy | 4. Watt-hour |
Correct Code: A-3, B-1, C-2, D-4
Answer: a
22. Match the physical quantities with their respective units:
| List-I (Quantity) | List-II (Unit) |
|---|---|
| A. Joule | 3. Work |
| B. Ampere | 1. Current |
| C. Watt | 2. Power |
| D. Volt | 4. Potential difference |
| E. Calorie | 5. Heat |
Answer: a (A-3, B-1, C-2, D-4, E-5)
23. Match the physical quantity with correct unit:
| List-I | List-II |
|---|---|
| A. Acceleration | 4. m/s² |
| B. Force | 3. Newton |
| C. Work | 1. Joule |
| D. Impulse | 2. Newton-second |
Correct Code: A-4, B-3, C-1, D-2
Answer: c