HSC Science (General)
HSC Science (Electronics)
HSC Science (Computer Science)
Academic Year: 2024-2025
Date & Time: 17th February 2025, 11:00 am
Duration: 3h
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General Instructions:
The question paper is divided into four sections:
- Section A: Q. No. 1 contains Ten multiple choice type of questions carrying One mark each.
Q. No. 2 contains Eight very short answer type of questions carrying One mark each. - Section B: Q. No. 3 to Q. No. 14 contain Twelve short answer type of questions carrying Two marks each. (Attempt any Eight).
- Section C: Q. No. 15 to Q. No. 26 contain Twelve short answer type of questions carrying Three marks each. (Attempt any Eight).
- Section D: Q. No. 27 to Q. No. 31 contain Five long answer type of questions carrying Four marks each.(Attempt any Three).
- Use of the log table is allowed. Use of calculator is not allowed.
- Figures to the right indicate full marks.
- For multiple choice type questions, only the first attempt will be considered for evaluation.
- Physical Constants:
- h = 6.63 × 10−34 Js
- c = 3 × 108 m/s
- π = 3.142
- g = 9.8 m/s2
- ε0 = 8.85 × 10−12 C2/Nm2
- μ0 = 4π × 10−7 Wb/A-m
- σ = 5.67 × 10−8 W/m2k4
- 1 atm = 1.013 × 105 N/m2
- R = 8.319 j/mol-k
“If two systems are each in thermal equilibrium with a third system, they are also in thermal equilibrium with each other.” This statement refers to ______.
zeroth law of thermodynamics
first law of thermodynamics
second law of thermodynamics
Carnot’s law
Chapter:
In Bernoulli’s theorem, which of the following is constant?
Linear momentum
Angular momentum
Mass
Energy
Chapter:
Which of the following materials belongs to diathermanous substance?
Wood
Iron
Glass
Copper
Chapter:
Electric potential ‘V’ at a distance ‘r’ from a point charge is directly proportional to ______.
r
r2
`1/r`
`1/r^2`
Chapter:
Which of the following equations gives correct expression for the internal resistance of a cell by using potentiometer?
`r = R [V/E - 1]`
`r = R [1 - E/V]`
`r = R [1 - V/E]`
`r = R [E/V - 1]`
Chapter:
An electron, a proton, an α-particle, and a hydrogen atom are moving with the same kinetic energy. The associated de Broglie wavelength will be longest for ______.
Electron
Proton
α-particle
Hydrogen atom
Chapter: [0.14] Dual Nature of Radiation and Matter
The gate which produces high output, when its both inputs are high is ______.
X-OR gate
AND gate
NAND gate
NOR gate
Chapter:
The power rating of a ceiling fan rotating with a constant torque of 2 Nm with an angular speed 2π of rad/s will be ______.
π W
2π W
3π W
4π W
Chapter:
A string of length 2 m is vibrating with 2 loops. The distance between its node and adjacent antinode is ______.
0.5 m
1.0 m
1.5 m
2.0 m
Chapter:
A transformer increases an alternating e.m.f. from 220V to 880V. If primary coil has 1000 turns, the number of turns in the secondary coil are ______.
1000
2000
3000
4000
Chapter:
At what temperature the surface tension of a liquid becomes zero?
Chapter:
Define self-inductance.
Chapter: [0.12] Electromagnetic Induction [0.16] Electromagnetic Inductions
What is the work done by an external uniform magnetic field perpendicular to the velocity of a moving charge?
Chapter:
What is value of B called, when H = 0 is in the hysteresis loop?
Chapter:
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Calculate the electric field intensity at a point just near the surface of a charged plane sheet, measured from its mid-point.
[σ = 8.85 μ C/m2]
Chapter:
Find the kinetic energy of 1 litre of an ideal gas at STP.
Chapter:
Using Newton's law of viscosity for streamline flow, derive an expression for the coefficient of viscosity.
Chapter:
State the formula for magnetic induction produced by a current in a circular arc of a wire. Hence find the magnetic induction at the centre of a current carrying circular looр.
Chapter:
State and prove: Law of conservation of angular momentum.
Chapter: [0.01] Rotational Dynamics
State any four advantages of light emitting diode (LED).
Chapter:
Calculate the energy radiated in one minute by a perfectly black body of surface area 200 cm2 when it is maintained at 127°C.
Chapter:
Two coils having self-inductances of 60 mH each are coupled with each other. If the coefficient of coupling is 0.75, calculate the mutual inductance between them.
Chapter:
In a series LCR circuit, if resistance, inductive reactance and capacitive reactance are 3Ω, 8Ω and 4Ω respectively, calculate phase difference between voltage and current.
Chapter:
State the advantages of potentiometer over voltmeter.
Chapter: [0.09] Current Electricity [0.13] Current Electricity
Draw the circuit diagram of a full wave rectifier.
Chapter:
A body of mass 0.8 kg performs linear S.H.M. It experiences a restoring force of 0.4 N when its displacement from the mean position is 4 cm. Determine the force constant and period of S.H.M.
Chapter:
A gas of 0.5 mole at 300 K expands isothermally from an initial volume of 2.0 litre to a final volume of 6.0 litre. What is the work done by gas?
Chapter:
Obtain the expression for the period of a magnet vibrating in a uniform magnetic field and performing S.H.M.
Chapter: [0.05] Oscillations
In a thermodynamic system, define mechanical equilibrium.
Chapter:
In a thermodynamic system, define chemical equilibrium.
Chapter:
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In a thermodynamic system, define thermal equilibrium.
Chapter:
What is Brewster’s law? Derive the formula for Brewster angle.
Chapter: [0.07] Wave Optics
Derive an expression for the law of radioactive decay.
Chapter:
Define one Becquerel.
Chapter: [0.15] Structure of Atoms and Nuclei [0.18] Atoms, Molecules and Nuclei
State and prove Kirchoff’s law of heat radiation.
Chapter: [0.03] Kinetic Theory of Gases and Radiation
Obtain an expression for practical determination of end correction for a pipe open at both ends.
Chapter:
Obtain an expression for practical determination of end correction for a pipe closed at one end.
Chapter:
A conducting bar is rotating with constant angular speed around a pivot at one end in a uniform magnetic field perpendicular to its plane of rotation. Obtain an expression for the rotational e.m.f. induced between the ends of the bar.
Chapter:
An electron in hydrogen atom stays in its second orbit for 10−8 s. How many revolutions will it make around the nucleus at that time?
Chapter: [0.15] Structure of Atoms and Nuclei [0.18] Atoms, Molecules and Nuclei
A flywheel of a motor has mass 100 kg and radius 1.5 m. The motor develops a constant torque of 2000 Nm. The flywheel starts rotating from rest. Calculate the work done during the first 4 revolutions.
Chapter:
A galvanometer has a resistance of 50 Ω and a current of 2 mA is needed for its full scale deflection. Calculate the resistance required to convert it into an ammeter of 0.5 A range.
Chapter:
A galvanometer has a resistance of 50 Ω and a current of 2 mA is needed for its full scale deflection. Calculate the resistance required to convert it into a voltmeter of 10 V range.
Chapter:
Diameter of a water drop is 0.6 mm. Calculate the pressure inside a liquid drop.
(T = 72 dyne/cm, atmospheric pressure = 1.013 × 105 N/m2)
Chapter:
A solenoid of length π m and 5 cm in diameter has a winding of 1000 turns and carries a current of 5 A. Calculate the magnetic field at its centre along the radius.
Chapter: [0.1] Magnetic Fields Due to Electric Current
Explain ferromagnetism on the basis of the domain theory.
Chapter: [0.11] Magnetic Materials [0.15] Magnetism
Obtain an expression for average power dissipated in a series LCR circuit.
Chapter:
Distinguish between the phenomenon of interference and diffraction of light.
Chapter: [0.11] Interference and Diffraction
A double-slit arrangement produces interference fringes for sodium light (λ = 589 nm) that are 0.20° apart. What is the angular fringe separation if the entire arrangement is immersed in water (n = 1.33)?
Chapter: [0.07] Wave Optics
State Einstein's photoelectric equation and mention the physical significance of each term involved in it.
Chapter:
The wavelength of incident light is 4000 Å. Calculate the energy of the incident photon.
Chapter:
State any four uses of Van de Graaff generator.
Chapter:
In a parallel plate air capacitor, intensity of electric field is changing at the rate of 2 × 1011 V/ms. If the area of each plate is 20 cm2, calculate the displacement current.
Chapter:
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