- What is angular momentum?
A) The force causing rotation
B) The energy of rotation
C) The quantity of rotational motion
D) The resistance to motion
- The SI unit of angular momentum is:
A) kg·m/s
B) N·m
C) kg·m²/s
D) J/s
- Angular momentum is a:
A) Scalar quantity
B) Vector quantity
C) Dimensionless quantity
D) Tensor only
- The angular momentum of a rotating rigid body is given by:
L = I\omega
A) L = mv
B) L = Iω
C) L = Fr
D) L = ma
- The direction of angular momentum is determined by:
A) Fleming’s rule
B) Left-hand rule
C) Right-hand rule
D) Newton’s rule
- Which quantity is the rotational equivalent of mass?
A) Torque
B) Angular velocity
C) Moment of inertia
D) Angular acceleration
- Which quantity changes angular momentum?
A) Velocity
B) Force
C) Torque
D) Mass
- The rotational form of Newton’s second law is:
\tau = \frac{dL}{dt}A) τ = dL/dt
A) τ = dL/dt
B) F = ma
C) p = mv
D) KE = ½mv²
- Angular momentum remains constant when:
A) Velocity is constant
B) Torque is zero
C) Force is maximum
D) Acceleration is zero
- A spinning skater rotates faster by:
A) Extending arms outward
B) Increasing mass
C) Pulling arms inward
D) Reducing friction
- When a skater pulls the arms inward, the moment of inertia:
A) Increases
B) Decreases
C) Remains constant
D) Becomes zero
D) Mass
- If moment of inertia decreases and angular momentum is conserved, angular velocity will:
A) Decrease
B) Become zero
C) Increase
D) Remain constant
- Which law explains planetary motion around the Sun?
A) Hooke’s law
B) Ohm’s law
C) Conservation of angular momentum
D) Boyle’s law
- The angular momentum of a point mass is:
L = mvrA) L = ma
A) L = ma
B) L = mv
C) L = mvr
D) L = Fr
- Which of the following has the largest moment of inertia for equal mass and radius?
A) Solid sphere
B) Solid disc
C) Hollow cylinder
D) Point mass at center
- What happens to orbital speed when a planet moves closer to the Sun?
A) Decreases
B) Remains constant
C) Becomes zero
D) Increases
- Which quantity is conserved in the absence of external torque?
A) Force
B) Velocity
C) Angular momentum
D) Acceleration
- The dimensional formula of angular momentum is:
A) [MLT⁻²]
B) [ML²T⁻¹]
C) [ML²T⁻²]
D) [M⁰L⁰T⁰]
- Gyroscopes work because of:
A) Friction
B) Elasticity
C) Angular momentum conservation
D) Surface tension
- Rotational kinetic energy is given by:
A) KE = ½mv²
B) KE = Iω
C) KE = ½Iω²
D) KE = Fr
- If the radius of rotation doubles while angular velocity remains constant, angular momentum will:
A) Decrease
B) Remain unchanged
C) Increase
D) Become zero
- Which physical quantity is directly proportional to angular momentum?
A) Temperature
B) Angular velocity
C) Pressure
D) Density
- The moment of inertia of a point mass is:
I = mr^2A) I = mv
A) I = mv
B) I = mr²
C) I = Fr
D) I = ma
- Which phenomenon is best explained by angular momentum conservation?
A) Reflection of light
B) Floating of ships
C) Spinning of neutron stars
D) Refraction of light
- In the absence of external torque, which equation is correct?
I_1\omega_1 = I_2\omega_2A) F₁v₁ = F₂v₂
A) F₁v₁ = F₂v₂
B) I₁ω₁ = I₂ω₂
C) P₁V₁ = P₂V₂
D) m₁a₁ = m₂a₂
- Why does a bicycle remain stable while moving?
A) Friction only
B) Gravity only
C) Angular momentum of wheels
D) Air pressure
- Which quantity is conserved in the absence of external torque?
A) Force
B) Velocity
C) Angular momentum
D) Acceleration
- Which branch of physics heavily uses angular momentum quantization?
A) Thermodynamics
B) Quantum mechanics
C) Fluid mechanics
D) Optics
- The quantity ω in rotational motion represents:
A) Torque
B) Angular acceleration
C) Angular velocity
D) Frequency only
- Which statement is correct about angular momentum?
A) It exists only in planets
B) It is always zero
C) It depends on rotational motion
D) It is not conserved
- A faster spinning object generally has:
A) Less angular momentum
B) Greater angular momentum
C) Zero momentum
D) Constant inertia
