HSC Science (General)
HSC Science (Electronics)
HSC Science (Computer Science)
Academic Year: 2021-2022
Date & Time: 10th March 2022, 10:30 am
Duration: 3h30m
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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 contains 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 each multiple-choice type of question, it is mandatory to write the correct answer along with its alphabet. e.g., (a)......../(b)......../(c)......./(d)........ No marks(s) shall be given if ONLY the correct answer or the alphabet of the correct answer is written. Only the first attempt will be considered for evaluation.
- Physical Constants :
(i) mass of electron m= 9.1 × 10-31 kg
(ii) ε0 = 8.85 × 10-12 `C^2/Nm^2`
(iii) π = 3.142
(iv) Charge on electron e = 1.6 × 10-19C
(v) µ0 = 4π × 10-7Wb/Am
(vi) h - 6.63 × 10-34 Js
(vii) C = 3 × 108 m/s
The first law of thermodynamics is concerned with the conservation of ______.
momentum
energy
temperature
mass
velocity
Chapter: [0.04] Thermodynamics
The average value of alternating current over a full cycle is always ______. [I0 = Peak value of current]
zero
`"I"_0/2`
`"I"_0/sqrt2`
2I0
Chapter: [0.13] AC Circuits
The angle at which maximum torque is exerted by the external uniform electric field on the electric dipole is ______.
0°
30°
45°
90°
Chapter: [0.08] Electrostatics
Which property of light does not change when it travels from one medium to another?
Velocity
Wavelength
Amplitude
Frequency
Chapter: [0.07] Wave Optics
The root mean square speed of the molecules of a gas is proportional to ______.
[T =Absolute temperature of gas]
`sqrt"T"`
`1/sqrt"T"`
T
`1/"T"`
Chapter: [0.03] Kinetic Theory of Gases and Radiation
The unit Wbm-2 is equal to ______.
henry
watt
dyne
tesla
Chapter: [0.1] Magnetic Fields Due to Electric Current
When the bob performs a vertical circular motion and the string rotates in a vertical plane, the difference in the tension in the string at horizontal position and uppermost position is ______.
mg
2 mg
3 mg
6 mg
Chapter: [0.01] Rotational Dynamics
A liquid rises in glass capillary tube upto a height of 2.5 cm at room temperature. If another glass capillary tube having radius half that of the earlier tube is immersed in the same Liquid, the rise of liquid in it will be _______.
1.25 cm
2.5 cm
5 cm
10 cm
Chapter: [0.02] Mechanical Properties of Fluids [0.06] Surface Tension
In young 's double slit experiment the two coherent sources have different amplitudes. If the ratio of maximum intensity to minimum intensity is 16 : 1, then the ratio of amplitudes of the two source will be _______.
4 : 1
5 : 3
1 : 4
1 : 16
Chapter: [0.07] Wave Optics
The equation of a simple harmonic progressive wave travelling on a string is y = 8 sin (0.02x - 4t) cm. The speed of the wave is ______.
10 cm/s
20 cm/s
100 cm/s
200 cm/s
Chapter: [0.06] Superposition of Waves
Define potential gradient of the potentiometer wire.
Chapter: [0.09] Current Electricity [0.13] Current Electricity
State the formula for critical velocity in terms of Reynold's number for a flow of a fluid.
Chapter: [0.02] Mechanical Properties of Fluids
Is it always necessary to use red light to get a photoelectric effect?
Chapter: [0.14] Dual Nature of Radiation and Matter
Write the Boolean expression for Exclusive - OR (X - OR) gate.
Chapter:
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Write the differential equation for angular S.H.M.
Chapter: [0.05] Oscillations
What is the mathematical formula for the third postulate of Bohr's atomic model?
Chapter: [0.15] Structure of Atoms and Nuclei
Two inductor coils with inductance 10 mH and 20 mH are connected in series. What is the resultant inductance of the combination of the two coils?
Chapter: [0.12] Electromagnetic Induction
Calculate the moment of inertia of a uniform disc of mass 10 kg and radius 60 cm about an axis perpendicular to its length and passing through its center.
Chapter: [0.01] Rotational Dynamics
Define moment of inertia. State its SI unit and dimensions.
Chapter: [0.01] Rotational Dynamics
What is polar dielectrics?
Chapter: [0.08] Electrostatics
What is nonpolar dielectric?
Chapter: [0.08] Electrostatics
What is a thermodynamic process?
Chapter: [0.04] Thermodynamics
Give any two types of a thermodynamic process.
Chapter: [0.04] Thermodynamics
Derive an expression for the radius of the nth Bohr orbit for the hydrogen atom.
Chapter: [0.15] Structure of Atoms and Nuclei
What are harmonics?
Chapter: [0.06] Superposition of Waves
What are overtones?
Chapter: [0.06] Superposition of Waves
Distinguish between a potentiometer and a voltmeter.
Chapter: [0.09] Current Electricity [0.13] Current Electricity
What is mechanical equilibrium?
Chapter: [0.04] Thermodynamics
What is meant by ‘thermal equilibrium’?
Chapter: [0.04] Thermodynamics
An electron in an atom is revolving round the nucleus in a circular orbit of radius 5.3 × 10-11 m with a speed of 3 × 106 m/s. Find the angular momentum of electron.
Chapter: [0.01] Rotational Dynamics
Plane wavefront of Light of wavelength 6000 Å is incident on two slits on a screen perpendicular to the direction of light rays. If the total separation of 10 brights fringes on a screen 2m away is 2 cm, find the distance between the slits.
Chapter: [0.07] Wave Optics
Eight droplets of water each of radius 0.2 mm coalesce into a single drop. Find the decrease in the surface area.
Chapter: [0.02] Mechanical Properties of Fluids [0.06] Surface Tension
A 0.1 H inductor a 25 × 10-6 F capacitor and a 15 Ω resistor are connected in series to a 120 V, 50 Hz AC source. Calculate the resonant frequency.
Chapter: [0.05] Oscillations
The difference between the two molar specific heats of gas is 9000 J/kg K. If the ratio of the two specific heats is 1.5, calculate the two molar specific heats.
Chapter: [0.03] Kinetic Theory of Gases and Radiation
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With the help of a neat diagram, explain the reflection of Light on a plane-reflecting surface.
Chapter: [0.07] Wave Optics
What is magnetization?
Chapter: [0.11] Magnetic Materials [0.15] Magnetism
Define Magnetic intensity.
Chapter: [0.11] Magnetic Materials [0.15] Magnetism
What is magnetic susceptibility?
Chapter: [0.11] Magnetic Materials [0.15] Magnetism
Prove that the frequency of beats is equal to the difference between the frequencies of the two sound notes giving rise to beats.
Chapter: [0.06] Superposition of Waves [0.07] Wave Motion [0.1] Wave Theory of Light
Define Capacitive reactance.
Chapter: [0.13] AC Circuits
Derive an expression for the kinetic energy of a rotating body with uniform angular velocity.
Chapter: [0.01] Rotational Dynamics
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
Derive an expression for the terminal velocity of the sphere falling under gravity through a viscous medium.
Chapter: [0.02] Mechanical Properties of Fluids
Determine the shortest wavelengths of Balmer and Pasch en series. Given the limit for the Lyman series is 912 Å.
Chapter: [0.15] Structure of Atoms and Nuclei
Calculate the value of magnetic field at a distance of 3 cm from a very long, straight wire carrying a current of 6 A.
Chapter: [0.1] Magnetic Fields Due to Electric Current
A parallel plate capacitor filled with air has an area of 6 cm2 and plate separation of 3 mm. Calculate its capacitance.
Chapter:
An emf of 91 mV is induced in the windings of a coil when the current in o nearby coil is increasing at the rate of 1.3 A/s. what is the mutual inductance (M) of the two coils in mH?
Chapter: [0.12] Electromagnetic Induction [0.16] Electromagnetic Inductions
Two cells of emf 4 V and 2 V having a respective internal resistance of 1 Ω and 2 Ω are connected in parallel, so as to send current in the same direction through an external resistance of 5 Ω. Find the current through the external resistance.
Chapter: [0.09] Current Electricity
Derive an expression for the pressure exerted by a gas on the basis of the kinetic theory of gases.
Chapter: [0.03] Kinetic Theory of Gases and Radiation
What is a rectifier?
Chapter: [0.16] Semiconductor Devices
Draw the circuit diagram of a half-wave rectifier. Hence explain its working.
Chapter: [0.16] Semiconductor Devices
Draw a neat and labelled diagram of suspended coil type moving coil galvanometer.
Chapter: [0.1] Magnetic Fields Due to Electric Current
The initial pressure and volume of a gas enclosed in a cylinder are 2 × 105 N/m2 and 6 × 10-3 m3 respectively. If the work done in compressing the gas at constant pressure is 150 J. find the final volume of the gas.
Chapter: [0.1] Magnetic Fields Due to Electric Current
Derive a formula for the length of second's pendulum.
Chapter: [0.05] Oscillations
A particle performing Linear S.H.M. has a maximum velocity 25 cm/sand maximum acceleration 100 cm/s2. Find the period of oscillations.
Chapter: [0.04] Oscillations [0.05] Oscillations
Explain de-Broglie wavelength.
Chapter: [0.14] Dual Nature of Radiation and Matter
Obtain an expression for de-Broglie wavelength of wave associated with material particles. The photoelectric work function for metal is 4.2 eV. Find the threshold wavelength.
Chapter: [0.14] Dual Nature of Radiation and Matter
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