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