Maharashtra HSC Class 12 Physics June 2026 question paper
Maximum marks 70 · Time 3 hours
Try each question first, then open its model answer. Where the paper offers a choice, both questions are shown with OR between them.
Section A
1 mark each
- Q.1 (i)1 markThe MI of ring of radius and mass about its central axis is _____
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- Q.1 (ii)1 markFor a monoatomic gas enclosed in a container at a constant temperature has degrees of freedom
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- Q.1 (iii)1 markThe equation of the first law of thermodynamics for isochoric process is
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- Q.1 (iv)1 markCyclotron can not accelerate _____
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- Q.1 (v)1 markIn a purely inductive and capacitive circuit, power factor is, _____
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- Q.1 (vi)1 markThe Boolean equation for NOR gate is
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- Q.1 (vii)1 markWhen number of capacitors having each of capacity are connected in series, their equivalent capacity is
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- Q.1 (viii)1 markA polarising angle for an optical material is 35°. Then refractive index of the material is
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- Q.1 (ix)1 markFor a streamline flow, the relative velocity between the two liquid layers is 10 cm/s. The distance between them is 5 cm. The velocity gradient is
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- Q.1 (x)1 markThe wavelength of a stationary wave on a string is 0.75 m with frequency of 64 Hz. Then, the velocity of wave is
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- Answer the following questions :Q.2 (i)1 markAbsorption of ink by a blotting paper is an example of which phenomenon of fluids?
- Q.2 (ii)1 markState Kirchhoff's first law for electrical network.
- Q.2 (iii)1 markDefine 'photoelectric work function.'
- Q.2 (iv)1 markWhich series of spectral lines belongs to the ultraviolet region of the hydrogen spectrum?
- Q.2 (v)1 markWhich semiconductor device converts solar energy into electrical energy?
- Q.2 (vi)1 markDefine the term wavefront.
- Q.2 (vii)1 markA motorcyclist performs horizontal circular motion inside a well of inner radius 3 m. Calculate the minimum speed to perform the stunt if coefficient of static friction is 0.3. [ ].
- Q.2 (viii)1 markCalculate the maximum velocity of a particle having amplitude of oscillation 4 cm and period 4 seconds.
Section B
2 marks each · attempt any 8
- Q.32 marksObtain an expression for the maximum speed of a vehicle along horizontal circular curved road.
- Q.42 marksFor a thermodynamic system : Define : (a) Mechanical equilibrium (b) Chemical equilibrium
- Q.52 marksWhat are polar molecules and non polar molecules?
- Q.62 marksExplain how will you convert moving coil galvanometer into voltmeter?
- Q.72 marksDistinguish between free and forced vibrations.
- Q.82 marksState any two postulates of Bohr's theory of hydrogen atom.
- Q.92 marksExplain the cyclic process with the help of a neat diagram.
- Q.102 marksA star is emitting light at the wavelength of 4000Å. Determine the limit of angular resolution of a telescope having an objective of diameter of 400 cm.
- Q.112 marksCalculate the value of for solar radiation assuming the temperature on the surface of the sun is 5800 K. [ Wien's constant m.k. ]
- Q.122 marksCalculate the radius of water drop, so that the excess pressure inside it is . [ Surface tension of water N/m ]
- Q.132 marksThe susceptibility of magnetic material is at 27°C. At what temperature its susceptibility will be ?
- Q.142 marksAn alternating voltage source given by is connected across a pure resistor of . Determine : (i) Frequency of the source. (ii) RMS value of emf.
Section C
3 marks each · attempt any 8
- Q.153 marksState and prove perpendicular axes theorem.
- Q.163 marksOn the basis of molecular theory, explain the phenomenon of surface tension.
- Q.173 marksShow that all harmonics are present in the case of an air column vibrating in a pipe open at both the ends.
- Q.183 marksWhat is interference of light? State any four conditions for obtaining well defined and steady interference pattern.
- Q.193 marksWith the help of a neat circuit diagram, explain the working of a half wave rectifier. Draw input and output waveforms.
- Q.203 marksObtain an expression for orbital magnetic moment of an electron revolving around the nucleus of an atom.
- Q.213 marksDefine the terms : (a) Inductive reactance (b) Capacitive reactance (c) Impedance
- Q.223 marksA parallel plate capacitor filled with air has an area and the plate separation is 2 mm. Calculate its capacity.
- Q.233 marksTwo resistances and in the two gaps of a meterbridge give a null point dividing the wire in the ratio 4 : 6. If both resistances are increased by , the null point divides the wire in the ratio 5 : 6. Calculate the value of and .
- Q.243 marksCalculate the shortest wavelength of Paschen series and the longest wavelength of Balmer series for hydrogen atom.
- Q.253 marksCalculate the current flowing through two long parallel wires carrying equal currents and separated by a distance of 1.35 cm experiencing a force per unit length of N/m.
- Q.263 marksAn emf of 90 mV is induced in the winding of a coil, when current in a nearby coil is increasing at the rate of 4.5 A/s. What is the mutual inductance of the two coils?
Section D
4 marks each · attempt any 3
- Q.274 marksDerive an expression for pressure exerted by a gas on the basis of kinetic theory of gases.
- Q.284 marksState differential equation of linear S.H.M. hence obtain an expression for acceleration, velocity and displacement of a particle performing S.H.M.
- Q.294 marksWith the help of neat diagram explain construction of a transformer. Calculate energy required to build up current of 1A in an inductor of inductance 20 mH.
- Q.304 marksDraw a neat schematic diagram of a photo cell. The photoelectric work function for a metal is 4.2 eV. Find threshold wavelength.
- Q.31 (i)4 marksObtain an expression for magnetic induction of a toroid of N no. of turns about an axis passing through its centre and perpendicular to plane.
- Q.31 (ii)A Carnot refrigerator operates between 150 K and 200 K, calculate its coefficient of performance.