CUET Questions — Physics — CUET UG

Q48. A car has a fresh storage battery of e.m.f. 15 V and internal resistance 4 x 10⁻² Ω. If the starter motor draws a current of 85 A, what is the terminal voltage of the battery when the starter is

Q43. A hot wire voltmeter measures the voltage across the inductor, the capacitor and the resistor as 150 V, 100 V and 50 V across a series, LCR circuit. If resistance is 100 Ω, the current in the cir

Q16. What will be the time by light to travel 2 cm thickness of glass of refractive index 1.5?

Q7. The two coherent monochromatic light beams of intensities I and 41 are superposed. The maximum and minimum possible intensities in the resulting beams are: (a) 5 I and I (b) 9 I and I (c) 5 I and

Q3. What is the force between two small charged spheres having charges of 4 x 10-7C and 6 × 10-7C placed 60 cm apart in air? (a) 3 x 10-3N (b) 4 x 10-3N (c) 6 x 10-3N (d) 9 x 10-3N

Q18. The waves used by artificial satellite for communication purposes are (a) Ground waves (b) Microwaves (c) F. M. radio waves (d) A. M. radio waves

Q41. Three charges q, -q, q placed at the vertices of an equilateral triangle as shown in figure. What is the magnitude of force on charge placed at position 3 due to the presence of other two charges

Q22. The half-lives of 2 radioactive specimen are T₁ = 5 years. and T₂ = 7.5 years. The ratio of their disintegration constants and λ₁ and λ₂ is:

Q2. Match List - I with List - II List-I (A) Microwave (B) UV Rays (C) X-Rays (D) Gamma-Rays List-II (1) Radar System for Aircraft Navigation (II) To study crystal structure (III) Radioactive decay of

Q4. The half-life period of a radioactive element 'X' is same as the mean life of another radioactive element Y. Initially both of them have the same no. of atoms, then: A. X and Y have the same decay

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