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