PHY301 Midterm Preparation by ZB

Q1. What is the unit of force in the SI system?

1. Newton
2. Joule
3. Watt
4. Pascal

Answer: A) Newton

Q2. The velocity of a particle in uniform circular motion is:

1. Constant
2. Changing in magnitude
3. Changing in direction only
4. Changing in both magnitude and direction

Answer: C) Changing in direction only

Q3. The work done by a force is given by:

1. Force × Distance
2. Force × Time
3. Power × Time
4. Power × Distance

Answer: A) Force × Distance

Q5. The center of mass of a system of particles moves as if it were a single particle of mass equal to the total mass of the system under the action of:

1. The net external force
2. The net internal force
3. All the forces
4. The gravitational force

Answer: A) The net external force

Thermodynamics:

Q6. The first law of thermodynamics is a statement of the conservation of:

1. Energy
2. Mass
3. Momentum
4. Entropy

Answer: A) Energy

Q8. The entropy of an ideal gas increases when:

1. Temperature increases at constant volume
2. Pressure increases at constant temperature
3. Volume increases at constant temperature
4. Temperature decreases at constant pressure

Answer: C) Volume increases at constant temperature

Q9. In an adiabatic process, the heat exchanged is:

1. Zero
2. Constant
3. Equal to the work done
4. Equal to the change in internal energy

Answer: A) Zero

Q10. Which of the following is a state function?

1. Heat
2. Work
3. Internal energy
4. Power

Answer: C) Internal energy