2025Class 12Set 55/1/170 marks33 questions
21 of its 33 questions are here. The rest have a figure or are still being checked, so for now they're only in the official PDF.
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Source: CBSE Board Examination 2025, Class 12 Physics (042), paper 55/1/1, published by CBSE. CBSE's ZIP of every set
Two wires P and Q are made of the same material. The wire Q has twice the diameter and half the length as that of wire P. If the resistance of wire P is R, the resistance of the wire Q will be
A 1 cm segment of a wire lying along x-axis carries current of 0.5 A along +x direction. A magnetic field B⃗ = (0.4 mT) ĵ + (0.6 mT) k̂ is switched on, in the region. The force acting on the segment is
A coil has 100 turns, each of area 0.05 m² and total resistance 1.5 Ω. It is inserted at an instant in a magnetic field of 90 mT, with its axis parallel to the field. The charge induced in the coil at that instant is :
You are required to design an air-filled solenoid of inductance 0.016 H having a length 0.81 m and radius 0.02 m. The number of turns in the solenoid should be
A voltage v = v₀ sin ωt applied to a circuit drives a current i = i₀ sin (ωt + ϕ) in the circuit. The average power consumed in the circuit over a cycle is
A beaker is filled with water (refractive index 4/3) upto a height H. A coin is placed at its bottom. The depth of the coin, when viewed along the near normal direction, will be
The stopping potential V₀ measured in a photoelectric experiment for a metal surface is plotted against frequency ν of the incident radiation. Let m be the slope of the straight line so obtained. Then the value of charge of an electron is given by (h is the Planck’s constant.)
Let λₑ, λₚ and λd be the wavelengths associated with an electron, a proton and a deuteron, all moving with the same speed. Then the correct relation between them is