1st Year Physics 1st Quarter Book Paper

Q1. Multiple choice questions (Attempt all · 12 × 1 = 12)

1. If size (length) of the wings of a fan is increased, its rotational speed, for the same voltage and current, will
   1. increase
   2. decrease
   3. may increase or decrease
   4. remain constant
2. Dimension of universal gravitational constant is.
   1. [M⁻²L³T⁻²]
   2. [M³L⁻¹T⁻²]
   3. [M⁻¹L³T⁻²]
   4. [M⁻³L³T⁻²]
3. What is the force experienced by a projectile after the initial force that launched it into the air in the absence of air resistance?
   1. The gravitational force
   2. The nuclear force
   3. The contact force
   4. The electromagnetic force
4. Vector product of two parallel vectors is:
   1. AB
   2. AB sin 90°
   3. Zero
   4. Undefined
5. Angular momentum for a rigid body is:
   1. L = Iω
   2. L = Iα
   3. L = mω
   4. L = mv²
6. The diameter of the Earth is approximately:
   1. 10⁹ m
   2. 10⁷ m
   3. 10¹² m
   4. 10⁴ m
7. A body starting from rest means:
   1. vᵢ = 0
   2. v𝒻 = 0
   3. a = 0
   4. t = 0
8. A physical quantity that has both magnitude and direction is called:
   1. Scalar
   2. Vector
   3. Constant
   4. Unit quantity
9. The term mr² represents:
   1. Torque
   2. Angular momentum
   3. Moment of inertia
   4. Linear inertia
10. Which of the following is a dimensional variable?
    1. Angle
    2. Strain
    3. Length
    4. Coefficient of friction
11. The horizontal velocity of a projectile is:
    1. Constant
    2. Increasing
    3. Decreasing
    4. Zero
12. Scalar product of antiparallel vectors is:
    1. Negative
    2. Positive
    3. Zero
    4. Undefined