UPSC CDS/OTA
Modern Physics
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Modern Physics

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Questions
30
Time
30 min
Marks
30
Solutions
All inline
Q1Which of the following statements about the Photoelectric Effect is/are correct? The kinetic energy of emitted electrons depends on the frequency of incident light. The number of emitted electrons depends on the intensity of the incident light. Option: 1MediumSolve →Q2Who discovered the neutron? Option: 2MediumSolve →Q3Which one of the following phenomena provides direct evidence of the quantisation of energy? Option: 3MediumSolve →Q4The rest mass of a photon is — Option: 4MediumSolve →Q5Consider the following statements about the Compton Effect: It shows the particle nature of light. It explains the change in wavelength of X-rays when scattered. Which of these is/are correct? Option: 5MediumSolve →Q6Which of the following scientists first proposed the concept of quanta of energy? Option: 6MediumSolve →Q7The de Broglie wavelength of an electron increases when: Option: 7MediumSolve →Q8Which of these nuclear reactions is used in nuclear power plants? Option: 8MediumSolve →Q9Which one of the following is correct about radioactive decay? Option: 9MediumSolve →Q10The uncertainty principle is associated with — Option: 10MediumSolve →
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