HSC Science (General)
HSC Science (Electronics)
HSC Science (Computer Science)
Academic Year: 2020-2021
Date: April 2021
Duration: 3h
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- The question paper is divided into four sections.
- Section A: Q. No. 1 contains Ten multiple-choice type of questions carrying One mark each.
- Section A: Q. No. 2 contains Eight very short answer type of questions carrying One mark each.
- Section B: Q. No. 3 to Q. No. 14 contains Twelve short answer type of questions carrying Two marks each. (Attempt any Eight).
- Section C: Q. No.15 to Q. No. 26 contains Twelve short answer type of questions carrying Three marks each. (Attempt any Eight).
- Section D: Q.No. 27 to Q. No. 31 contains Five long answer type of questions carrying Four marks each. (Attempt any Three).
- Use of log table is allowed. Use of calculator is not allowed.
- Figures to the right indicate full marks.
- For each MCQ, correct answer must be written along with its alphabet.
e.g., (a) ..... / (b ) .... / ( c ) .... / ( d) ..... Only first attempt will be considered for evaluation. - Physical constants:
a. Latent heat of vaporisation, Lvap = 2256 kJ/kg
b. Acceleration due to gravity, g = 9.8 m/s2
Acceleration of a particle executing S.H.M. at its mean position.
Is infinity
Varies
Is maximum
Is zero
Chapter: [0.05] Oscillations
Which of the following cannot produce two coherent sources?
Lloyd’s mirror
Fresnel biprism
Young’s double-slit
Prism
Chapter: [0.07] Wave Optics
Light follows wave nature because ______
Light rays travel in a straight line
Light exhibits the phenomenon of reflection and refraction
Light exhibits the phenomenon of interference
Light causes the phenomenon of the photoelectric effect
Chapter: [0.07] Wave Optics
If an electron is brought towards another electron, the electric potential energy of the system ______.
decreases
increases
Becomes zero
Remains same
Chapter: [0.08] Electrostatics
Relative permeability of iron 5500, then its magnetic susceptibility will be ______
5500 × 107
5501
5499
5500 × 10-7
Chapter: [0.11] Magnetic Materials
According to the right-hand rule, the direction of magnetic induction if the current is directed in an anticlockwise direction is ______
perpendicular and inwards
perpendicular and outwards
same as current
opposite to that of current
Chapter: [0.1] Magnetic Fields Due to Electric Current
Choose the correct option.
Solar cell operates on the principle of ______.
Diffusion
Recombination
Photovoltaic action
Carrier flow
Chapter: [0.16] Semiconductor Devices
In a common base configuration, the transistor has an emitter current of 10 mA and a collector current of 9.8 mA. The value of base current is ______
0.1 mA
0.2 mA
0.3 mA
0.4 mA
Chapter: [0.16] Semiconductor Devices
An electric bulb operates 10 V d.c. If this bulb is connected to an a.c. source and gives normal brightness, then the peak value of the source is ______
141.4 V
14.14 V
1.414 V
0.1414 V
Chapter: [0.13] AC Circuits
In the expression e = –dΦ/dt, the -ve sign signifies ______
The induced emf is produced only when magnetic flux decreases
The induced emf opposes the change in the magnetic flux
The induced emf is opposite to the direction of the flux.
The induced emf is independent of change in magnetic flux.
Chapter: [0.12] Electromagnetic Induction
What is the surface film?
Chapter: [0.02] Mechanical Properties of Fluids
Why wave motion is doubly periodic?
Chapter: [0.06] Superposition of Waves [0.06] Superposition of Waves
What are harmonics?
Chapter: [0.06] Superposition of Waves
A group of objects that can form a unit which may have the ability to exchange energy with its surrounding is called what?
Chapter: [0.04] Thermodynamics
In Young’s double-slit experiment, if there is no initial phase difference between the light from the two slits, a point on the screen corresponds to the 5th minimum. What is the path difference?
Chapter: [0.07] Wave Optics
Which physical quantity has its unit as J/C? Is it a scalar or vector?
Chapter: [0.08] Electrostatics
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The relative velocity between two parallel layers of water is 8 cm/s and the perpendicular distance between them is 0.1 cm. Calculate the velocity gradient.
Chapter: [0.02] Mechanical Properties of Fluids
The radius of the smallest orbit of the electron( aO) in a hydrogen atom is 0.053 nm. What is the radius of the 4th orbit of the electron in a hydrogen atom?
Chapter: [0.15] Structure of Atoms and Nuclei
State the assumptions made for thermodynamic processes.
Chapter: [0.04] Thermodynamics
Obtain the differential equation of linear simple harmonic motion.
Chapter: [0.04] Oscillations [0.05] Oscillations
Answer in brief.
State the law of simple pendulum.
Chapter: [0.05] Oscillations
Show the graphical representation of radiant power of a black body per unit range of wavelength as a function of wavelength.
Chapter: [0.03] Kinetic Theory of Gases and Radiation
Draw a neat labeled diagram of Ferry’s black body.
Chapter: [0.03] Kinetic Theory of Gases and Radiation
State any four applications of beats.
Chapter: [0.06] Superposition of Waves [0.07] Wave Motion [0.1] Wave Theory of Light
Define: Ionization energy.
Chapter: [0.15] Structure of Atoms and Nuclei
A raindrop of radius 0.3 mm falls through the air with a terminal velocity of 1 m/s. The viscosity of air is 18 x 10−6 Ns /m2. Find the viscous force on the raindrop.
Chapter: [0.02] Mechanical Properties of Fluids
The optical path of a ray of light of a given wavelength travelling a distance of 3 cm in flint glass having refractive index 1.6 is the same as that on travelling a distance x cm through a medium having a refractive index 1.25. Determine the value of x.
Chapter: [0.07] Wave Optics
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: [0.07] Wave Optics
Explain De Broglie’s Hypothesis.
Chapter: [0.14] Dual Nature of Radiation and Matter
A sonometer wire of length 1 m is stretched by a weight of 10 kg. The fundamental frequency of vibration is 100 Hz. Determine the linear density of the material of the wire.
Chapter: [0.06] Superposition of Waves [0.08] Stationary Waves
Derive an expression for the difference in tensions at the highest and lowest point for a particle performing the vertical circular motion.
Chapter: [0.01] Rotational Dynamics
Obtain an expression for the capillary rise or fall using the forces method.
Chapter: [0.02] Mechanical Properties of Fluids [0.06] Surface Tension
Calculate the ratio of two specific heats of polyatomic gas molecules.
Chapter: [0.03] Kinetic Theory of Gases and Radiation
How is potential gradient measured? Explain.
Chapter: [0.09] Current Electricity [0.13] Current Electricity
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Explain with a neat circuit diagram. How you will determine the unknown resistances using a meter bridge.
Chapter: [0.09] Current Electricity [0.13] Current Electricity
Determine the motional emf induced in a straight conductor moving in a uniform magnetic field with constant velocity on the basis of Lorentz force.
Chapter: [0.12] Electromagnetic Induction
What is a logic gate? Draw the symbol and give the truth table for NOT gate. Why NOT the gate is called an inverter?
Chapter:
The magnetic field at the centre of a circular loop of radius 12.3 cm is 6.4 x 10-6 T. What will be the magnetic moment of the loop?
Chapter: [0.1] Magnetic Fields Due to Electric Current
A plane of a coil of 10 turns is tightly wound around a solenoid of diameter 2 cm having 400 turns per centimeter. The relative permeability of the core is 800. Calculate the inductance of the solenoid.
Chapter: [0.12] Electromagnetic Induction
What is the capacitive reactance of a capacitor of 5µF at a frequency of (1) 50 Hz and (2) 20KHZ?
Chapter: [0.13] AC Circuits
The energy of a photon is 2 eV. Find its frequency and wavelength.
Chapter: [0.14] Dual Nature of Radiation and Matter
A radioactive substance decays to (1/10)th of its original value in 56 days. Calculate its decay constant.
Chapter: [0.15] Structure of Atoms and Nuclei
What is a conical pendulum? Obtain an expression for its time period
Chapter: [0.01] Rotational Dynamics
Explain the thermodynamics of the isobaric process.
Chapter: [0.04] Thermodynamics
Three-point charges +q, +2q and Q are placed at the three vertices of an equilateral triangle. Find the value of charge Q (in terms of q), so that the electric potential energy of the system is zero.
Chapter: [0.08] Electrostatics
A solenoid has a core of material with relative permeability 500 and its windings carry a current of 1 A. The number of turns of the solenoid is 500 per meter. Calculate the magnetization of the material.
Chapter: [0.11] Magnetic Materials [0.15] Magnetism
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
State any two characteristics of a series LCR AC resonance circuit.
Chapter: [0.13] AC Circuits
A magnet of magnetic moment 3Am2 weighs 75 g. The density of the material of the magnet is 7500 kg/m3. what is magnetization?
Chapter: [0.11] Magnetic Materials [0.15] Magnetism
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