CUET Questions — Physics

Q42. The intensity of a plane monochromatic wave is 1380 Wm⁻² What is the amplitude of electric field in this wave? (Take speed of light 3 × 10⁸ ms⁻¹; wo = 8.85 x 10⁻¹²C²N⁻¹m⁻²)

Q33. Which of the following is not an EM wave? (a) X-rays (b) Gamma rays (c) Microwaves (d) Cathode rays

Q25. A 300 turns rectangular coil of length 20 cm and breadth 12 cm is carrying a current of 12 A, when placed in a magnetic field of 6 T. The plane of the coil is making an angle of 60° with the magn

Q6. The distance estimation for which ray optics is good approximation for an aperture of 3 mm and wavelength 300 nm would be: (a) 40 m (b) 30 m (c) 20 m (d) 10 m

Q4. Which of the following scientists has not contributed significantly to photoelectric effect? (a) Wilhelm Hallwacks (b) Philipp Lenard (c) Albert Einstein (d) C.J. Davission

Q31. Match List - I with List - II List-I (A) Rod rotated with angular velocity w (B) Coil is rotated with angular velocity in a uniform magnetic field. (C) Rod is moved with linear velocity v in unif

Q7. The current flowing through the two bulbs marked as 60 W, 240 V each when connected in series with 240 V source is: (a) 0.125 A (b) 0.25 A (c) 4 A (d) 2 A

Q16. What will be the time by light to travel 2 cm thickness of glass of refractive index 1.5? (a) 2 x 10⁻¹⁰ s (b) 2.5 x 10⁻¹⁰ s (c) 2.25 x 10¹⁰ s (d) 10⁻¹⁰ s

Q9. The same current is flowing in two AC circuits. The first circuit contains a pure inductor and the second, a capacitor. If the frequency of the AC is increased, then the current will. (a) increase

Q9. Sodium has a work function of 2 eV. Calculate the maximum energy and speed of the emitted electrons, when sodium is illuminated by radiation of wavelength 150 nm: (a) 7.5 x 10-19 J and 3.2 x 103 m

Q45. What should be the size of an obstacle to observe diffraction?

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

Q13. Match List - I with List - II. List - I (A) Low Mass number nuclei (B) Electron microscope (C) Beta decay (D) 235U List - II (I) Medium penetrating power (II) Nuclear reactor (III) Diffracted ele

Q45. What uniform magnetic field applied perpendicular to a beam of electrons moving at 1.3 x 106 m/s, is required to make the electrons travels in a circular arc of radius 0.35 m? (a) 2.1 x 10-5 G (b

Q24. Energy gap between valence band and conduction band of a semiconductor is approximately: (a) zero (b) 4 eV (c) 1 eV (d) 10 eV

Q31. In an AC generator when the plane of the armature is perpendicular to the magnetic field, what will the magnitude of the magnetic flux passing through the coil and the emf induced in the coil be?

Q38. The capacities of two capacitors are C₁ and C₂ and their respective potentials are V₁ and V₂. If they are connected with a wire, then the loss of energy is given by: (a) C1C2(V1+V2) / (2(C1+C2))

Q19. The time taken by light to travel normally through a glass plate of thickness 1 mm would be: (Take refractive index of glass = 1.5) (a) 0.1 x 10⁻¹³s (b) 12 x 10⁻⁵s (c) 5 x 10⁻¹²s (d) 1.5 x 10⁻⁵s

Q39. Four materials A, B, C and D have the magnetic susceptibilities XmA, XMB, Xmc and Xmprespectively. which are related as XmD < XmC < XMB < XMA Which material can be magnetised with maximum ease? (

Q19. After how many half-lives a radioactive substance will decay to 6.25% of its original value: (a) One half life (b) Two half lives (c) Three half lives (d) Four half lives