HSC Science (General)
HSC Science (Electronics)
HSC Science (Computer Science)
Academic Year: 2022-2023
Date & Time: 21st July 2023, 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 10 multiple choice type questions carrying one mark each. Q. No. 2 contains 8 very short answer type questions carrying one mark each.
- Section B: Q. No. 3 to Q. No. 14 are 12 short answer-I type questions carrying two marks each. Attempt any eight questions.
- Section C: Q. No. 15 to Q. No. 26 are 12 short answer-II type questions carrying three marks each. Attempt any eight questions.
- Section D: Q. No. 27 to Q. No. 31 contains 5 long answer type questions carrying four marks each. Attempt any three questions.
- Start each section on a new page.
- Figures to the right indicate full marks.
- For each MCQ, the correct answer must be written along with its alphabet e.g. (a) .../ (b) .../ (c) .../ (d) ....
- Evaluation of each MCQ would be done for the first attempt only.
- Use of Logarithm Tables is allowed. Use of a calculator is not allowed.
- Physical constants:
- π = 3.142
- g = 9.8 m/s2
- R = 8.31 J/mol-K
- C = 3 × 108 m/s
- ε0 = 8.85 × 10-12 C2/N.m2
- µ0 = 4π × 10-7T.m/A
- RH = 1.097 × 107 m-1
- h = 6.63 × 10-34 Js
A body performing uniform circular motion has constant ______.
velocity
kinetic energy
displacement
acceleration
Chapter:
When a soluble substance such as common salt (i.e., sodium chloride) is dissolved in water, the surface tension of water ______.
decreases
becomes zero
remains the same
increases
Chapter:
The periodic time of angular oscillations of a bar magnet is proportional to ______.
ratio of moment of inertia and magnetic field
ratio of magnetic field and moment of inertia
square root of the ratio of moment of inertia and magnetic field
square root of the ratio of magnetic field and moment of inertia
Chapter:
The coefficient of absorption of a body is equal to its coefficient of emission at a given temperature is called ______.
Stefan’s law
Newton’s law of cooling
Kirchoff’s law of heat radiation
Boyle’s law
Chapter:
The second law of thermodynamics deals with the transfer of ______.
Work done
Energy
Momentum
Heat
Chapter: [4] Thermodynamics
Which of the following phenomenon proves that light is a transverse wave?
Reflection
Interference
Diffraction
Polarization
Chapter: [7] Wave Optics
Magnitude of the induced e.m.f. produced between the ends of a conductor of length `("‘"L"’")/2` moving with a uniform velocity ‘v’ at right angles to a uniform magnetic field of intensity ‘2B’ will be ______.
`(BLv)/4`
`(BLv)/2`
BLv
2BLv
Chapter:
Solar cell operates on the principle of ______.
Diffusion
Recombination
Photovoltaic action
Carrier flow
Photoelectric effect
Chapter: [16] Semiconductor Devices
A body performing linear S.H.M. experiences a force of 0.2 N when displaced through 4 cm from the mean position. Its force constant will be ______.
2 N/m
2.5 N/m
5 N/m
8 N/m
Chapter:
If a current of 1 A flows through a solenoid of length 25 cm and made up of 250 turns of copper wire then the magnitude of magnetic induction inside the solenoid will be ______.
0.12568 × 10−3 T
1.2568 × 10−3 T
l.2568 × 102 T
1.256 × 104 T
Chapter:
State the formula for end correction in a resonance tube experiment.
Chapter:
Categorize the H2O as a polar and non-polar dielectric.
Chapter:
Categorize the CO2 as a polar and non-polar dielectric.
Chapter:
Calculate the period of a particle performing linear S.H.M. with maximum speed of 0.08 m/s and maximum acceleration of 0.32 m/s2.
Chapter:
State the conditions for current and impedance in parallel resonance circuit.
Chapter:
Radius of third Bohr orbit is 0.477 nm. Calculate the radius of the second Bohr orbit.
Chapter:
Name the logic gate having single input-single output.
Chapter:
State any four Conditions for Obtaining well–defined and Steady Interference Patterns.
Chapter: [7] Wave Optics
Derive an expression for electric field intensity due to an infinitely long straight charged wire.
Chapter:
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What are eddy currents?
Chapter: [12] Electromagnetic Induction
State applications of eddy currents.
Chapter: [12] Electromagnetic Induction
Define and state formulae for inductive reactance.
Chapter:
Define and state formulae for capacitive reactance.
Chapter:
Draw a p-V diagram and explain the concept of positive and negative work. Give one example each.
Chapter: [4] Thermodynamics [9] Kinetic Theory of Gases and Radiation
State law of length.
Chapter: [6] Superposition of Waves [8] Stationary Waves
State law of linear density.
Chapter: [6] Superposition of Waves [8] Stationary Waves
For a moving coil galvanometer, show that `S = G/(n - 1)`, where S is shunt resistance, G is galvanometer resistance and n is ratio of total current to the full scale deflection current.
Chapter:
The de Broglie wavelengths associated with an electron and a proton are the same. What will be the ratio of
- their momenta
- their kinetic energies?
Chapter: [14] Dual Nature of Radiation and Matter
Obtain an expression for the half-lifetime of radioactive material. Hence state the relation between an average life and half life time of radioactive material.
Chapter: [15] Structure of Atoms and Nuclei
A motorcyclist performs stunt along the cylindrical wall of a ‘Well of Death’ of inner radius 4 m. Coefficient of static friction between tyres and the wall is 0.4. Calculate the maximum period of revolution. (Use g = 10 m/s2)
Chapter:
Calculate the diameter of a water drop if the excess pressure inside the drop is 80 N/m2. (Surface Tension of water = 7.2 × 10−2 N/m).
Chapter:
The magnetic field at a distance of 2.4 cm from a long straight [current-carrying] wire is 16 µT. What is the current through the wire?
Chapter: [10] Magnetic Fields Due to Electric Current
Explain the construction and working of Ferry’s black body.
Chapter: [3] Kinetic Theory of Gases and Radiation
Show that the deflection produced in a moving coil galvanometer is directly proportional to the current flowing through its coil or vice versa.
Chapter:
Draw the circuit diagram of a half-wave rectifier. Hence explain its working.
Chapter: [16] Semiconductor Devices
Obtain the expression for the period of a simple pendulum performing S.H.M.
Chapter: [5] Oscillations
Prove that the frequency of beats is equal to the difference between the frequencies of the two sound notes giving rise to beats.
Chapter: [6] Superposition of Waves [7] Wave Motion [10] Wave Theory of Light
Obtain an expression for the orbital magnetic moment of an electron rotating about the nucleus in an atom.
Chapter: [11] Magnetic Materials
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State Einstein photoelectric equation.
Chapter: [14] Dual Nature of Radiation and Matter
Explain two characteristics of the photoelectric effect on the basis of Einstein’s photoelectric equation.
Chapter:
Calculate the shortest wavelength of the Paschen series for the H atom.
Chapter:
Calculate the longest wavelength of the Balmer series for the H atom.
Chapter:
A 60 W filament lamp loses all its energy by radiation from its surface. The emissivity of the filament surface is 0.5 and the surface area is 5 × 10−5 m2. Calculate the temperature of the filament. (Given: σ = 5.67 × 10−8 Jm−2 s−1 K−4)
Chapter:
Two capacitors of capacitance C1 and C2 are connected in parallel and this combination is connected in series with a capacitor of capacity C3. Calculate the equivalent capacity of the combination of capacitors.
Chapter:
With an unknown resistance X in the left gap and a resistance of 30 Ω in the right gap of a meter-bridge, the null point is obtained at 40 cm from the left end of the wire. Calculate the unknown resistance and shift in the position of the null point when resistance in each gap is increased by 15 Ω.
Chapter:
An inductor of inductance 200 mH is connected to an A.C. source of peak e.m.f. 210 V and frequency 50 Hz. Calculate the peak current and instantaneous voltage of the source when the current is at its peak value.
Chapter:
State and prove the theorem of the parallel axis about the moment of inertia.
Chapter: [1] Rotational Dynamics [3] Angular Momentum
One mole of an ideal gas is enclosed in an ideal cylinder at 1.0 M Pa and 27°C. The gas is allowed to expand till its volume is doubled. Calculate the work done if the expansion is isobaric.
Chapter:
Distinguish between streamlined flow and turbulent flow.
Chapter: [2] Mechanical Properties of Fluids
With what terminal velocity will an air bubble 0.4 mm in diameter rise in a liquid of viscosity 0.1 Ns/m2 and specific gravity 0.9? Density of air is 1.29 kg/m3.
Chapter: [2] Mechanical Properties of Fluids
A Plane Wavefront of light of wavelength 5500 A.U. is incident on two slits in a screen perpendicular to the direction of light rays. If the total separation of 10 bright fringes on a screen 2 m away is 2 cm. Find the distance between the slits.
Chapter: [7] Wave Optics
What is Transformer?
Chapter: [12] Electromagnetic Induction [16] Electromagnetic Inductions
Distinguish between Step up and Step Down Transformer.
Chapter: [12] Electromagnetic Induction [16] Electromagnetic Inductions
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