CUET Questions — Physics
362 solved questions with detailed explanations
Q3. The work function for Aluminium surface is 4.2 eV. Find the threshold wavelength for the photoelectric emission. (a) 2959 A° (b) 4200 A° (c) 4736 A° (d) 5890 A°
Q36. Using the given information, calculate the mass defect of ¹⁶O nucleus in MeV/c². mass of electron, m_e = 0.00055u mass of proton, m_p = 1.00727u mass of neutron, m_n = 1.00866u experimental mass
Q44. Which of the following statements are correct? (A) When light rays undergo two internal reflections inside a raindrop, a secondary rainbow is formed. (B) The angle between the emergent ray and an
Q47. An object is placed before a convex lens and its real image is obtained. Now if half of the surface is covered with paper. The result will be: (a) No image will be formed (b) Half image will be f
Q19. Which of the following speeds is the least?
Q23. The electrical conductivity of a semiconductor increases when electromagnetic radiation of wavelength shorter than 2480 nm is incident on it. The band gap for the semiconductor is: (a) 0.5 eV (b)
Q29. A e.m.f. e_s = 50sin 314t is applied across a pure capacitor of 637µF. The instantaneous current I is: (a) 10cos 314tA (b) 50cos 314tA (c) 20cos 314tA (d) 20sin 314tA
Q10. Let iB, iC and iE represent the emitter current, collector current and the base current respectively in a transistor. Choose the correct statement from the following. (a) iC is slightly greater t
Q39. An electron moves around the nucleus in a hydrogen atom of radius 0.05 nm with a velocity of 2 x 10⁶ m s⁻¹. The magnetic field produced at the center of nucleus is: (a) 0.128 T (b) 6.4 T (c) 128
Q47. What would be the position of image formed by the lens combination given in the figure below? f=+10cm 0 20 cm -10 cm 10 cm 20 cm +10 cm (a) 10 cm to the right of third lens (b) 7 cm to the right