AM Physics Test 3 Leave a Comment / By fawadtwopointo@gmail.com / August 23, 2025 Welcome to your AM Physics Test 3 A ball is thrown vertically upwards with velocity 20 m/s. Maximum height reached is (g = 10 m/s²): 30 m 10 m 20 m 40 m None Q2. The moment of inertia of a thin rod of length L and mass M about its center is: ML²/3 ML²/12 ML²/2 ML²/6 None The time period of a simple pendulum is proportional to: 1/√L 1/L L √L None The magnetic field at center of a circular coil of radius R carrying current I is: μ₀I/2R μ₀I²/R μ₀I/2πR μ₀I/4πR² None A Carnot engine operates between 400 K and 300 K. Efficiency is: 10% 15% 20% 25% None A photon has wavelength 400 nm. Its energy is: 4.0 eV 2.5 eV 1.8 eV 3.1 eV None In SHM, maximum acceleration occurs at: Mean position Everywhere same Midway Extreme position None A wire of resistance 10 Ω is stretched to double its length. New resistance is: 30 Ω 40 Ω 10 Ω 20 Ω None Heisenberg uncertainty principle is: Δx·Δp ≥ h/2π Δx·Δp ≥ h Δx·Δp ≥ ħ/2 Δx·Δp ≥ 2h None A transformer works on the principle of: Mutual induction Self induction Static electricity Electromagnetic force None A particle moving with speed 0.6c has relativistic mass increase factor (γ): 1.25 2 1.5 1.33 None Which of the following is NOT a thermodynamic process? Isochoric Coulombic Isothermal Adiabatic None Which has highest energy per nucleon? Hydrogen-1 Uranium-235 Iron-56 Plutonium-239 None In Young’s double slit experiment, fringe width is proportional to: 1/λ 1/D λ 1/d None A coil of area A rotates in uniform magnetic field B with angular speed ω. Induced emf is: BA/ω B/ω BAω BAω² None Which particle is emitted in β⁻ decay? Neutron Proton Positron Electron None The dimensional formula of Planck’s constant (h) is: MLT⁻² ML²T⁻³ ML²T⁻¹ ML²T⁻² None Which law governs the force between two parallel current-carrying conductors? Coulomb’s law Newton’s law Ampere’s law Lorentz force None Which wave phenomenon proves light is transverse? Polarization Reflection Diffraction Interference None The half-life of a radioactive element is 10 days. The fraction remaining after 30 days is: 1/16 1/8 1/2 1/4 None The critical angle for glass–air interface is 42°. The refractive index of glass is: 1.5 1.7 1.2 1.3 None The work function of metal is 2 eV. Threshold wavelength is: 240 nm 420 nm 620 nm 310 nm None A satellite is in geostationary orbit. Its time period is: 24 h 90 min 6 h 12 h None If temperature of blackbody doubles, total radiated energy increases by factor: 2 8 16 4 None Which is a boson? Photon Electron Neutron Proton None The magnetic moment of current loop is: A/I IA I/A 1/IA None The entropy of the universe: Zero Remains constant Decreases Increases None The Compton shift depends on: Scattering angle Wavelength of incident photon Temperature Energy of photon None The maximum number of electrons in n=3 shell is: 32 8 18 2 None Which is NOT a conservative force? Gravity Elastic spring force Friction Electrostatic force None 1 out of 1 Time's upTime is Up!
