CUET Questions — Physics

Q2. Which of the following is the correct equation for the law of radioactive decay? Symbols have their usual meaning. (1) N(t) = Noe-t/x (2) N(t) = Noe-At (3) N(t) = Noe-2/t (4) N(t) = Noe-2At

Q36. If c is the speed of light; λ and v wavelength and frequency, respectively, of an electromagnetic radiation, then which of the following is true?

Q23. In the circuit shown below, the potential difference between A and B is: [Circuit diagram showing three parallel branches, each with a 1Ω resistor and a battery (1V, 2V, 3V). Points A and B are a

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

Q36. In terms of Bohr radius a₀, the radius of 2nd Bohr orbit of Hydrogen is: (a) 4a₀ (b) 8a₀ (c) √2a₀ (d) 2a₀

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

Q8. The shortest wavelength present in the Lyman series of spectral lines is: (Given Rydberg constant R = 1.097 x 107 m¯¹) (a) 9.1 x 10-8 m (b) 1.2 x 10-7 m (c) 8.2 x 107 m (d) 9.1 x 108 m

Q41. Choose the logic gate represented by the following combination of logic gates. A У1 y B У2 (a) NOR (b) NAND (c) AND (d) OR

Q47. The sensitivity of a potentiometer can be increased by:

Q9. A molecule of a substance has a permanent electric dipole moment of magnitude 10⁻³¹ Cm. A mole of this substance is 100% polarised by applying a strong electrostatic field of magnitude 10⁸ Vm⁻¹. T