CUET Questions — Physics

Q14. What is the value of Vo if the silicon diode starts conducting at 0.7 V while the Germanium start conducting at 0.3 V? [Circuit diagram showing a 12V source, 5kΩ resistor, Silicon diode, and Germ

Q26. In a hydrogen atom an electron makes a transition from n₁ → n₂, where n₁ and n₂ are the principal quantum numbers of these two states. Assuming Bohr's model to be valid, if the time period of ele

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

Q35. If charge is moving parallel to uniform magnetic field, its path will be:

Q50. Match List - I with List - II. List - I (A) ∮ B ⋅ ds = 0 (B) Directional properly of freely suspended magnet (C) Never intersect each other (D) Magnetic field of earth List - II (I) magnetic fiel

Q49. Current carrying wire produces:

Q40. Match List - I with List - II. List - I (A) Electric Field (B) Electric Flux (C) Electric Dipole Moment (D) Area Vector Element List - II (I) [LTA] (II) [L²] (III) [ML³ T⁻³ A⁻¹] (IV) [MLT⁻³ A⁻¹]

Q10. The metre bridge wire is made of alloys such as nichrome because they have: (a) high temperature coefficient of resistance and high resistivity (b) low temperature coefficient of resistance and l

Q11. Match List - I with List - II. LIST - I (A) Purely resistive AC circuit (B) Purely inductive or capacitive AC circuit (C) LCR series AC circuit (D) Power dissipated at resonance in LCR series cir

Q4. Which of the following pair of nuclides are Isobars?

A bus passes two persons moving in the direction of the moving bus at a speed of 3 km/hr and 5 km/hr, respectively. The bus passes the first person in 10 s and the second person in 11 s. Find the spee

Q27. Heavy water and ___________ is one of the substances used as moderator in reactors. (a) Sea water (b) Titanium (c) Graphite (d) Cobalt

Q6. A square shaped wire loop of side L is carrying a current I. What is the magnetic field at the point of intersection of diagonals of the square wire loop? (α) μοι πι√2 2√2 μοι (b) πι (c) 201 πι √2

Q31. A potential difference of 3 V is applied across a conductor of resistance 1.5 Ω. The number of electrons flowing through it in one second would be: (Given charge of an electron: e = 1.6 × 10⁻¹⁹ C

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

Q20. Which of the following causes electric conduction in a semiconductor? (a) Holes only (b) Electrons only (c) Both electrons and holes (d) Neither holes nor electrons

Q37. The capacitance of a capacitor becomes 7/6 times its original value if a dielectric slab of thickness t = 3/4 d is introduced in between the plates: where d is the separation between the plates.

Q21. Three circuits are shown below in which same alternating current is flowing. What will be the effect on currents in three cases respectively if frequency of alternating emf be increased? (i) [Cir

Q37. Light of two different frequencies whose photons have energies 1 eV and 2.5 eV respectively, illuminate a metal of work function 0.5 eV. The ratio of the maximum KE of the emitted electrons will

Q25. A uniformly charged conducting sphere of radius 1.3 m has a surface charge density of 70 µC m-2. What is the total electric flux leaving the surface of the sphere? (a) 5.9 x 108 N m² C-1 (b) 1.7