Durgam Vigyan Sansthana

Learn To Converge Your Dreams with Durgam Vigyan Sansthana Institute. Q1. A diver in a swimming pool bends his head before diving. Why? a) Increases his linear velocity b) Decreases his angular velocity c) Increases his moment of inertia d) Decreases his moment of inertia Concept: Conservation of angular momentum L = Iω = constant When the diver bends his head, his mass comes closer to the axis of rotation. Hence, moment of inertia decreases. To conserve angular momentum, angular velocity increases. Correct Answer: (d) Decreases his moment of inertia Q2. The angular momentum of a system of particles is conserved when a) No external force acts b) No external torque acts c) No external impulse acts d) Axis of rotation remains same Angular momentum changes only if external torque is applied. τ = dL/dt If external torque is zero, angular momentum remains constant. ...

IIT JEE Advanced Physics MCQs Learn To Converge Your Dreams with Durgam Vigyan Sansthana Institute Solve these IIT JEE advanced physics MCQs. Click "View Solution" to see the detailed explanation. Question 1: A ball is thrown vertically upwards with a velocity of 20 m/s. What is the maximum height reached? (g = 9.8 m/s²) A) 10.2 m B) 15.3 m C) 20.4 m D) 25.5 m View Solution Solution: At maximum height, v = 0. Using v² = u² - 2gh → 0 = 400 - 19.6h → h = 20.41 m. Correct answer: C. Question 2: A block of mass 5 kg is pushed on a frictionless surface with a force of 10 N. What is the acceleration? A) 1 m/s² B) 2 m/s² C) 3 m/s² D) 4 m/s² View Solution Solution: F = ma → a = F/m = 10/5 = 2 m/s². Correct answer: B. Question 3: A capacitor of capacitance 10 μF is charged to 50 V. What is the energy s...