NEET UG PHYSICS Multiple Choice Questions (MCQs)

16. Which of the following is a scalar quantity?

• a) Velocity
• b) Displacement
• c) Distance
• d) Acceleration

Answer: c) Distance

17. What is the slope of a position-time graph?

• a) Acceleration
• b) Displacement
• c) Velocity
• d) Speed

Answer: c) Velocity

18. The unit vector along a vector \( \vec{A} \) is given by:

• a) \( \frac{\vec{A}}{|A|} \)
• b) \( \frac{|A|}{\vec{A}} \)
• c) \( \vec{A}^2 \)
• d) \( |A| \cdot \vec{A} \)

Answer: a) \( \frac{\vec{A}}{|A|} \)

19. In uniformly accelerated motion, which quantity remains constant?

• a) Velocity
• b) Acceleration
• c) Position
• d) Speed

Answer: b) Acceleration

20. The relative velocity of two objects moving in opposite directions is:

• a) The sum of their velocities
• b) The difference of their velocities
• c) Zero
• d) Their product

Answer: a) The sum of their velocities

21. A body projected horizontally has a trajectory in the shape of:

• a) Straight line
• b) Parabola
• c) Circle
• d) Ellipse

Answer: b) Parabola

22. What is the angular displacement for one complete revolution in circular motion?

• a) \( \pi \)
• b) \( 2\pi \)
• c) \( \pi/2 \)
• d) \( 4\pi \)

Answer: b) \( 2\pi \)

23. The magnitude of displacement is equal to distance when:

• a) Motion is along a curved path
• b) Motion is along a straight line
• c) Motion is in a circle
• d) Motion is random

Answer: b) Motion is along a straight line

24. The area under a velocity-time graph represents:

• a) Distance
• b) Speed
• c) Acceleration
• d) Displacement

Answer: d) Displacement

25. Which of the following is true for a projectile motion?

• a) Horizontal velocity changes with time
• b) Vertical velocity is constant
• c) Acceleration is always directed downward
• d) The trajectory is a straight line

Answer: c) Acceleration is always directed downward

26. If the components of a vector are 3 and 4, its magnitude is:

• a) 5
• b) 7
• c) 1
• d) 6

Answer: a) 5

27. What is the relative velocity of two objects moving at the same speed in the same direction?

• a) Zero
• b) The sum of their speeds
• c) The difference of their speeds
• d) Their product

Answer: a) Zero

28. The maximum height in a projectile motion is given by:

• a) \( \frac{u^2 \sin^2\theta}{2g} \)
• b) \( \frac{u \sin\theta}{g} \)
• c) \( \frac{u^2}{2g} \)
• d) \( \frac{u^2 \sin\theta}{g} \)

Answer: a) \( \frac{u^2 \sin^2\theta}{2g} \)

29. A particle moves in a circle of radius r with a constant speed v. The acceleration of the particle is:

• a) Zero
• b) \( v^2/r \)
• c) \( v/r \)
• d) \( r/v^2 \)

Answer: b) \( v^2/r \)

30. When two vectors are added, their resultant is maximum when the angle between them is:

• a) 0°
• b) 90°
• c) 180°
• d) 45°

Answer: a) 0°