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Tell from where I can download Maharashtra State Board of Secondary & Higher Secondary Education 12th Physics exam question paper for doing revision for exam???

As you are looking for Maharashtra State Board of Secondary & Higher Secondary Education 12th Physics exam question paper, here I am giving:

The buckling of a beam is found to be more if _______.
(A) the breadth of the beam is large.
(B) the beam material has large value of Young’s modulus.
(C) the length of the beam is small.
(D) the depth of the beam is small.

The number of degrees of freedom for a rigid diatomic molecule is _______.
(A) 3 (B) 5 (C) 6 (D) 7

The light from the Sun is found to have a maximum intensity near the wavelength of 470 nm.
Assuming the surface of the Sun as a black body, the temperature of the Sun is _______.
[Wien’s constant b = 2.898 × 10−3 mK]
(A) 5800 K (B) 6050 K (C) 6166 K (D) 6500 K

i. State Kepler’s law of orbit and law of equal areas.
ii. A car of mass. 1500 Kg rounds a curve of radius 250m at 90 Km/hour. Calculate the centripetal force
acting on it.
iii. Draw a neat labelled diagram for Ferry’s perfectly black body.
iv. A mass M attached to a spring oscillates with a period of 2 seconds. If the mass is increased by 2 Kg,
the period increases by 1 second. Find the initial mass, assuming that Hooke’s law is obeyed.
v. Differentiate between free and forced vibrations.
vi. The surface tension of water at 0°C is 75.5 dyne/cm. Find surface tension of water at 25°C. [α for
water = 0.0021/°C]
vii. Derive the relation between surface tension and surface energy per unit area.

MH HSC 12th Physics paper

Can you provide me previous year question paper of Physics subject of Maharashtra State Board of Secondary & Higher Secondary Education as my sister needs it for preparation?

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The previous year question paper of Physics subject of Maharashtra State Board of Secondary & Higher Secondary Education as your sister needs it for preparation is as follows:

Q.1. Select and write the most appropriate answer from the given alternatives for each subquestion

i. In the diffraction pattern due to a single slit of width ‘d’ with incident light of wavelength ‘λ’, at an angle of diffraction ‘θ’, the condition for first minimum is _______.
(A) λ sin θ = d (B) d cos θ = λ
(C) d sin θ = λ (D) λ cos θ = d

ii. Kirchhoff’s junction law is equivalent to _______.
(A) conservation of energy
(B) conservation of charge
(C) conservation of electric potential
(D) conservation of electric flux

iii. let ‘p’ and ‘E’ denote the linear momentum and energy of emitted photon respectively. If the wavelength of incident radiation is increased _______.
(A) both p and E increase
(B) p increases and E decreases
(C) p decreases and E increases
(D) both p and E decrease

iv. The nuclei having same number of protons but different number of neutrons are called
_______.
(A) isobars (B) α - particles
(C) isotopes (D) γ – particles

v. In case of transistor oscillator, to obtain sustained oscillations, the product of voltage gain without feedback and feedback factor should be _______.
(A) zero (B) less than 1
(C) one (D) infinity

vi. The process of regaining of information from carrier wave at the receiver is called _____.
(A) modulation (B) transmission
(C) propagation (D) demodulation

vii. Reactance of a coil is 157 Ω. On connecting the coil across a source of frequency 100 Hz, the current lags behind e.m.f. by 45°. The inductance of the coil is _______.
(A) 0.25 H (B) 0.5 H
(C) 4 H (D) 314 H

Q.2. Attempt any SIX: [12]
i. Draw a neat labelled diagram of a parallel plate capacitor completely filled with
dielectric.
ii. A point is situated at 7cm and 7.2 cm from two coherent sources. Find the nature of
illumination at the point if wavelength of light is 4000Å.
iii. Obtain the expression for current sensitivity of moving coil galvanometer.
iv. In a cyclotron, magnetic field of 3.5 Wb/m2 is used to accelerare protons. What should be
the time interval in which the electric field between the Dees be reversed?
(Mass of proton = 1.67 × 10−27 Kg, Charge on proton = 1.6 × 10−19 C).
v. Define magnetization. State its formula and S.I. unit.
vi. Electrostatic energy of 3.5 × 10−4 J is stored in a capacitor at 700 V. What is the charge
on the capacitor?

vii. What is space wave propagation? State its three components.
viii. Find the value of energy of electron in eV in the third Bohr orbit of hydrogen atom.
(Rydberg’s constant (R) = 1.097 × 107 m−1,
Planck’s constant (h) = 6.63 × 10−34 J – s,
Velocity of light in air (c) = 3 × 108 m/s.)

Q.3. Attempt any THREE: [9]

i. With the help of neat labelled circuit diagram explain the working of half wave rectifier
using semiconductor diode. Draw the input and output waveforms.

ii. A cell balances against a length of 200 cm on a potentiometer wire, when it is shunted by
a resistance of 8Ω. The balancing length reduces by 40 cm, when it is shunted by a
resistance of 4Ω. Calculate the balancing length when the cell is in open circuit. Also
calculate the internal resistance of the cell.


iii. State the law of radioactive decay. Hence derive the expression N = Noe−λt where
symbols have their usual meanings.

iv. The photoelectric work function for a metal is 4.2 eV. If the stopping potential is 3V, find
the threshold wavelength and maximum kinetic energy of emitted electrons.
(Velocity of light in air = 3 × 108 m/s,
Planck’s constant = 6.63 × 10−34 J – s,
Charge on electron = 1.6 × 10−19 C)


Q.4. State Faraday’s laws of electromagnetic induction and Lenz’s law. [7]
Prove theoretically, the relation between e.m.f. induced and rate of change of magnetic flux in a
coil moving in a uniform magnetic field.
A circular coil of 250 turns and diameter 18 cm carries a current of 12A. What is the magnitude
of magnetic moment moment associated with the coil?
OR
On the basis of Huygens’ wave theory of light prove that velocity of light in a rarer medium is
greater that velocity of light in a denser medium.
In Young’s experiment the ratio of intensity at the maxima and minima in the interference
pattern is 36:16. What is the ratio of the widths of the two slits?