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