CUET Questions — Physics — CUET UG

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

Q8. In equation P = Ec⁻¹, where P is momentum, E is energy and c is the speed of light. In which of the following options, this equation is valid: (a) for an electron only (b) for a photon but not for

Q49. The focal length of the objective of a microscope if fo and that of the eye piece if fe. The aperture of objective is do and that of eye piece is de. Which of the following relation is correct? (

Q36. Choose the wrong statement: (a). Potential difference across the terminals of the cell in a closed circuit is less than its emf. (b) Internal resistance of the cell decreases with decrease in tem

Q12. Choose the correct experimental circuit arrangement for studying V-I characteristics a p-n junction diode in forward bias: (a) Pn mA Switch (S) (b) MA Pn Switch (S) (c) P OmA Switch (S) (d) mA Sw

Q38. A radioactive nucleus decays as given below: ZPX → Z+1Q → R → Z-1R Which particles are emitted in the sequence? (a) α, β, γ (b) β, γ, α (c) γ, α, β (d) β, α, γ

Q17. Choose the correct relation between drift velocity (va) and current density (J) from the following: (a) va = Jne (b) Vd = J / ne (c) va = ne / J (d) vd = neA / J

Q21. Two coherent light beams of intensities I and 4 I are superimposed. The maximum and minimum possible intensities in the resulting pattern are: (a) 5 I and 3 I (b) 5 I and I (c) 9 I and I (d) 9 I

Q6. The resistivity of a potentiometer wire is 10-7 Ωm and its cross-section area is 10-6 m². When a current of 0.1 A follows through the wire, its potential gradient is: (a) 10-1 V/m (b) 10-2 V/m (c)

Q48. Match List - I with List - II List-I (A) NAND Gat4e (1) (B) NOR Gate (C) NOT Gate (III) (D) OR Gate (IV) List-II Choose the correct answer from the options given below: (a) (A)-(I), (B)-(II), (C)

Q30. An electron enters a crossed electrical and magnetic field region with a speed of 100 m s-¹ along + x-axis and passes undeviated. The strength of magnetic field is 5.0 T and it acts along + z-axi