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ECAT - Practice Test - Physics - Modern Physics Quiz

Attempt 10 MCQs on ECAT - Practice Test - Physics - Modern Physics | Quiz 5

41. What is the mass of a proton?



42. What is the mass of an electron?



43. What is the charge of a proton?



44. What is the charge of an electron?



45. What is the charge of a neutron?



46. What is the value of Planck's constant?



47. A photon of 200 nm hits a metal (φ=4.0 eV). Find max KE of emitted electrons (hc=1240 eV·nm).



48. What fraction of a radioactive sample remains after 30 days if half-life is 10 days?



49. What is the photon energy for the transition from n=3 to n=2 in hydrogen?



50. What is the binding energy of a nucleus with mass defect 0.1 u? (1 u = 931.5 MeV)



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