CUET Questions — Physics

Q35. A capacitor charged from a 50 V d.c. supply is found to have charge of 10µC. The capacitance of the capacitor would be: (a) 0.1μF (b) 0.2µF (c) 0.3µF (d) 0.4µF

Q33 What is the unit of electric flux in terms of the base units of SI? (a) kg⁻¹ m³ s⁻³ A⁻¹ (b) kgm³ s⁻³ A⁻¹ (c) kgm³ s⁻³ A⁻¹ (d) kgm³ s⁻³ A⁻¹

Q25. Match List - I with List - II LIST - I (Type of EM Wave) (A) Microwaves (B) Radio waves (C) Infrared waves (D) Ultraviolet rays LIST - II (Application) (I) Cellular phones (II) Greenhouse effect

Q30. The focal length of a spherical mirror is equal to: 1. A quarter of its radius of curvature 2. Half of its radius of curvature 3. Three quarters of its radius of curvature 4. Equal to its radius

Q14. A very long solenoid has 800 turns per unit length. A current of 1.6 A flows through it. Then the magnetic induction in the middle of the solenoid on its axis is approximately: (a) 16 x 10-4 T (b

Q6. The resistivity of a potentiometer wire is 10-7 Ωm and its cross-section area is 10-6 m². When a current of 0.1 A follows through the wire, its potential gradient is: (a) 10-1 V/m (b) 10-2 V/m (c)

Q42. A plane electromagnetic wave of frequency 30MHz travels in free space along the x-direction. At a particular point in space and time E = 6.3ĵ V/m. The B at this point would be: (a) 2.1 × 10⁻⁸ k̂

Q32. The resistance of a potentiometer wire of length 4 m is 10Ω. A resistance box and 2 V accumulator are connected in series with it. What resistance should be introduced in the box to have a potent

Q47. A tiny spherical oil drop of mass 8 mg is kept suspended by applying a potential difference of 100 V between two metallic plates kept separated by a distance 1 cm. The number of electrons on the

Q14. A capacitor of 25µF is connected in series with d.c Voltage of 5V. The value of current in the circuit will be: (a) 2 x 10⁵ A (b) 5A (c) 5 x 10⁶ A (d) Zero