HSC Science (General)
HSC Science (Electronics)
HSC Science (Computer Science)
Academic Year: 2023-2024
Date & Time: 20th July 2024, 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 calculators 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:
- g = 9.8 m/s2
- π = 3.142
- μ0 = 4π × 10-7 Wb/Am
- c = 1.6 × 10-19 C
Atoms having the same number of protons but different number of neutrons are called ______.
isotopes
isobars
isotones
isomers
Chapter:
The molecules on the surface of liquid have ______.
minimum kinetic energy
minimum potential energy
maximum kinetic energy
maximum potential energy
Chapter:
If coefficient of emission is ‘e’ for a perfectly black body and coefficient of transmission is ‘t’ then, ______.
e = 0, t = 1
e = 1, t = 1
e = 0, t = 0
e = 1, t = 0
Chapter:
An LED emits visible light when it's ______.
Junction is reverse biased.
Depletion region widens.
Holes and electrons recombine.
The junction becomes hot.
Chapter: [0.16] Semiconductor Devices
An electron, a proton, an α-particle and a hydroger atom are moving with the same kinetic energy. The associated de Broglie wavelength will be the longest for ______.
electron
proton
α-particle
hydrogen atom
Chapter:
electrons
neutrons
positive ions
negative ions
Chapter: [0.14] Magnetic Effects of Electric Current
The unit henry is equal to ______.
Watt
ohm-second
dyne
Wb/m2
Chapter:
The ratio of emissive power of a perfect black body at 927°C and 327°C is ______.
2 : 1
4 : 1
8 : 1
16 : 1
Chapter:
In a series LCR circuit, the phase difference between the voltage and the current is 45°. Then the power factor will be ______.
0.607
0.707
0.808
1
Chapter: [0.13] AC Circuits
When an air column in a pipe closed at one end vibrates such that two nodes are formed in it, the frequency of its vibration is ______.
two times the fundamental frequency
three times the fundamental frequency
four times the fundamental frequency
five times the fundamental frequency
Chapter:
What is the radius of gyration of a solid sphere of radius R about its diameter?
Chapter:
Obtain the differential equation of linear simple harmonic motion.
Chapter: [0.04] Oscillations [0.05] Oscillations
What is the value of resistance for an ideal voltmeter?
Chapter: [0.09] Current Electricity [0.13] Current Electricity
What are eddy currents?
Chapter: [0.12] Electromagnetic Induction
A body of mass 0.2 kg performs linear S.H.M. It experiences a restoring force of 0.4 N when its displacement from the mean position is 8 cm. Determine force constant.
Chapter:
Determine the work done in bringing a charge of 5 µC from infinity to the point A. The potential at point A is 400 kV.
Chapter:
Show that the average energy per molecule is proportional to the absolute temperature T of the gas.
Chapter: [0.03] Kinetic Theory of Gases and Radiation
Explain the cyclic process.
Chapter: [0.04] Thermodynamics
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Distinguish between progressive waves and stationary waves.
Chapter:
Explain Biot Savart's Law.
Chapter: [0.1] Magnetic Fields Due to Electric Current
Draw a neat and labelled diagram of van de Graff generator.
Chapter:
State the formula for the following:
Average power in LCR circuit
Chapter:
Describe the construction and working of a transformer with a neat labelled diagram.
Chapter: [0.12] Electromagnetic Induction [0.16] Electromagnetic Inductions
A galvanometer has a resistance of 100 Ω and its full scale deflection current is 0.2 mA, what resistance should be added to it to have a range of 0-10 V?
Chapter:
An electron in hydrogen atom-stays in its second orbit for 10−8 s How many revolutions will it make around the nucleus in that time?
[Velocity of electron in second orbit = 1.07 × 106 m/s, radius of electron in second orbit = 2.14 × 10−10 m]
Chapter:
A torque of magnitude 400 Nm acting on a body of mass 40 kg produces an angular acceleration of 20 rad/s2. Calculate the moment of inertia of the body.
Chapter:
A bar magnet of moment of inertia of 500 gcm2 oscillates with a time period of 3.142 seconds in a horizontal plane. What is its magnetic moment if the horizontal component of earth’s magnetic field is 4 × 10−5T?
Chapter:
A telescope has an objective of diameter 2.5 m. What is its angular resolution when observed at 7500 Å?
Chapter:
Define surface tension
Chapter: [0.02] Mechanical Properties of Fluids [0.06] Surface Tension
Derive the relation between surface tension and surface energy per unit area.
Chapter: [0.02] Mechanical Properties of Fluids
Show that all harmonics are present on a stretched string between two rigid supports.
Chapter: [0.08] Stationary Waves
Derive an expression for the impedance of a series LCR circuit connected to an AC power supply.
Chapter:
Distinguish between diamagnetic and paramagnetic substances
Chapter: [0.11] Magnetic Materials [0.15] Magnetism
Obtain the condition for bridge balance in Wheatstone’s bridge.
Chapter: [0.13] Current Electricity
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Assuming expression for energy of electron, derive an expression for wavelength of spectral lines in hydrogen atom.
Chapter:
Explain, with the help of a circuit diagram, the principle and working of a Zener diode as voltage regular.
Chapter: [0.19] Semiconductors
A spherical drop of oil falls at a constant speed of 9.8 cm/s in steady air. Calculate the radius of the drop. The density of oil is 0.9013 g/cm3, density of air is 0.0013 g/cm3 and the coefficient of viscosity of air is 1.8 × 10-4 poise.
Chapter:
A search coil having 2000 turns with area 1.5 cm2 is placed in a magnetic field of 0.60 T. The coil is moved rapidly out of the field in a time of 0.2 s. Calculate the induced emf in the search coil.
Chapter: [0.12] Electromagnetic Induction
At what distance from the mean position is the kinetic energy of a particle performing S.H.M. of amplitude 10 cm, three times its potential energy?
Chapter:
When 2 × 1010 electrons are transferred from one conductor to another, a potential difference of 20 V appears between the conductors. Find the capacitance of the two conductors.
Chapter:
The magnetic field at the centre of a circular current carrying loop of radius 12 cm is 6.4 × 10-6 T. What is the magnetic moment of the loop?
Chapter:
Derive an expression for minimum speed to perform stunts in well of death.
Chapter:
Part of a racing track is to be designed for a radius of curvature of 288 m. We are not recommending the vehicles to drive faster than 216 km/hr. With what angle should the road be tilted?
Chapter:
Draw a p-V diagram and explain the concept of positive and negative work. Give one example each.
Chapter: [0.04] Thermodynamics [0.09] Kinetic Theory of Gases and Radiation
Derive the ratio of two specific heat capacities of monoatomic, diatomic and triatomic molecules.
Chapter: [0.09] Kinetic Theory of Gases and Radiation
Find kinctic energy of 4000 cc of a gas at S.T.P.
[Given: Standard pressure is 1.013 × 105 N/m2]
Chapter:
What is the photoelectric effect?
Chapter: [0.14] Dual Nature of Radiation and Matter
Draw a neat labelled diagram of a schematic of the experimental setup for the photoelectric effect.
Chapter: [0.14] Dual Nature of Radiation and Matter
What is Brewster’s law? Derive the formula for Brewster angle.
Chapter: [0.07] Wave Optics
Green light of wavelength 5100 Å from a narrow slit is incident on a double slit. If the overall separation of 10 fringes on a screen 2 m away is 2 cm. Find the slit separation.
Chapter:
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