Physics Quiz (SSS3) Hi, Test your knowledge with our Physics questions! 1 / 20 The half-life of a radioactive isotope is ______. the time taken for the isotope to decay completely the time taken for half of the radioactive nuclei to decay the time taken for the isotope to double in mass the time taken for the isotope to become stable 2 / 20 The velocity of light in a vacuum is approximately ______. 3.0 × 10⁷ m/s 3.0 × 10⁵ m/s 3.0 × 10⁸ m/s 3.0 × 10⁶ m/s 3 / 20 When a light ray passes from air to glass, it bends towards the ______. surface normal air reflected ray 4 / 20 The magnetic field inside a long solenoid is ______. uniform and strong none of the above non-uniform zero 5 / 20 Which law states that the induced electromotive force in a coil is proportional to the rate of change of magnetic flux linkage? Ohm’s law Faraday’s law Coulomb’s law Lenz’s law 6 / 20 The force between two charges is inversely proportional to the square of the ______. sum of the charges product of the charges difference of the charges distance between the charges 7 / 20 The property of a nucleus that determines its stability is its ______. density size charge neutron-to-proton ratio 8 / 20 The distance covered per unit time is called ______. displacement acceleration speed velocity 9 / 20 The SI unit of magnetic flux is the ______. henry weber gauss tesla 10 / 20 The electronvolt (eV) is a unit of ______. energy charge power force 11 / 20 The binding energy of a nucleus is the energy required to ______. ionize the nucleus break the nucleus into protons only separate the nucleus into its constituent nucleons increase the mass of the nucleus 12 / 20 The type of semiconductor doping that adds extra electrons is called ______. intrinsic n-type extrinsic p-type 13 / 20 The phenomenon in which electrons are emitted from a metal surface when light of certain frequency shines on it is called ______. photoelectric effect phosphorescence thermionic emission fluorescence 14 / 20 The rate of radioactive decay is measured using the quantity called ______. activity all of the above half-life frequency 15 / 20 The unit of electric field strength is ______. newton volt newton per coulomb (N/C) ampere 16 / 20 A transformer that increases voltage is called a ______ transformer. step-down step-up power isolating 17 / 20 The unit of capacitance is the ______. tesla henry farad ohm 18 / 20 Which of the following represents Ohm’s law? P = IV I = VR V = I²R V = IR 19 / 20 In the photoelectric effect, increasing the intensity of incident light ______. increases the work function increases the kinetic energy of emitted electrons decreases the number of emitted electrons increases the number of emitted electrons 20 / 20 The energy of a photon is directly proportional to its ______. wavelength frequency speed amplitude Your score isThe average score is 63% 0% Restart quiz
