Maharashtra HSC Class 12 Physics February 2026 question paper with answers

Section A

1 mark each

Q.1 (i)1 mark $When a number of droplets coalesce to form a single drop, the total surface area of the drop _____.$
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Q.1 (ii)1 mark $In an ideal gas, molecules possess _____.$
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Q.1 (iii)1 mark $If the frequency of incident radiation is increased above threshold frequency, keeping intensity and potential constant then the photoelectric current _____.$
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Q.1 (iv)1 mark $The process in which heat is neither absorbed nor released by a system is called _____.$
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Q.1 (v)1 mark $(l)$
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Q.1 (vi)1 mark $l$
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Q.1 (vii)1 mark $A metal surface is illuminated by photons of energy 5 eV and 2.5 eV respectively. The ratio of their wavelengths of emitted radiation is _____.$
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Q.1 (viii)1 mark $x = 2\sin\omega t$
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Q.1 (ix)1 mark $10\ \text{Am}^{2}$
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Q.1 (x)1 mark $X_L > X_C$
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Answer the following questions :
Q.2 (i)1 mark $State the formula for electric field intensity due to uniformly charged spherical shell.$
Q.2 (ii)1 mark $Name an instrument for measurement of e.m.f. of a cell.$
Q.2 (iii)1 mark $Calculate the magnitude of force experienced by a stationary charge exposed to uniform magnetic field.$
Q.2 (iv)1 mark $Which property of bar magnet is used in navigation?$
Q.2 (v)1 mark $In Young's double slit experiment, width of the two slits are in the ratio 25 : 1. Calculate the ratio of amplitudes.$
Q.2 (vi)1 mark $What is beta plus decay?$
Q.2 (vii)1 mark $If the tension in sonometer wire is increased by 21%, compare the initial frequency with the later.$
Q.2 (viii)1 mark $Define second's pendulum.$

Section B

2 marks each · attempt any 8

Q.32 marks $What are Eddy currents? State its two applications.$
Q.42 marks $State any two sources of error in meter bridge experiment. Explain how they can be minimised.$
Q.52 marks $Draw a ray diagram showing position of virtual sources and region of interference in biprism experiment.$
Q.62 marks $n^{\text{th}}$
Q.72 marks $2\ \text{kg m}^{2}$
Q.82 marks $2 \times 10^{-6}$
Q.92 marks $Derive an expression for the magnetic field produced by a current in a circular arc of a wire using Biot-Savart law.$
Q.102 marks $State advantages and disadvantages of photodiode.$
Q.112 marks $Distinguish between harmonics and overtones. [Any Two points]$
Q.122 marks $\eta_{glycerine} = 0.833\ Ns/m^{2}$
Q.132 marks $k_B = 1.4 \times 10^{-23}$
Q.142 marks $An inductor of inductance 200 mH is connected to an A.C. source of peak e.m.f. 220 V and frequency 50 Hz. Calculate the peak current in the circuit.$

Section C

3 marks each · attempt any 8

Q.153 marks $In thermodynamics, define : (a) Mechanical equilibrium (b) Chemical equilibrium (c) Thermal equilibrium$
Q.163 marks $Derive an expression for resonant frequency of series resonant circuit.$
Q.173 marks $Obtain an expression for period of a bar magnet vibrating in a uniform magnetic field and performing angular S.H.M.$
Q.183 marks $Define magnetization. State its S.I. unit and dimensions. What is the relation between permeability and magnetic susceptibility?$
Q.193 marks $Derive an expression for electric potential due to a point charge.$
Q.203 marks $Obtain an expression for the de-Broglie wavelength associated with an electron accelerated from rest through a potential difference of 'V' volts.$
Q.213 marks $With a neat circuit diagram, explain the working of a full wave rectifier. Draw input-output waveforms.$
Q.223 marks $The string of a guitar is 80 cm long and has a fundamental frequency of 112 Hz. If a guitarist wishes to produce a frequency of 160 Hz, where should he press the string?$
Q.233 marks $R = 8.31$
Q.243 marks $40\ \Omega$
Q.253 marks $a < r < b$
Q.263 marks $-3.4$

Section D

4 marks each · attempt any 3

Q.274 marks $Derive Laplace's law for spherical membrane of bubble due to surface tension.$
Q.284 marks $25\ \text{kg m}^{2}$
Q.294 marks $Derive the relation between coefficient of absorption, coefficient of reflection and coefficient of transmission. Compare the r.m.s. speed of hydrogen molecule at 127°C with r.m.s. speed of oxygen molecule at 27°C, given that molecular masses of hydrogen and oxygen are 2 and 32 respectively.$
Q.304 marks $1\text{m}^{2}$
Q.314 marks $Using analytical method, obtain an expression for the fringe width of two interfering waves.$