There are 70 Multiple Choice Questions.You have 60 minutes to answer.You cannot go back to a previous question, but you are free to skip questions.There will be NO negative marks.Good Luck! Examination Time is Up.Thank You! M.Sc. Space Science and Technology – 2022-23 Admissions : Entrance Examination Welcome to St Albert’s College (Autonomous) 1 / 70 For a body to be in equilibrium, which of the following conditions must exist? The sum of forces acting on the body must be zero No forces may be acting on the body The body must be accelerating The velocity of the body must be zero 2 / 70 A hiker stands at the bottom of a steep hill. The hiker may follow a straight-line path to the top of the hill, a distance of 300 feet, or she may follow a zig-zag path to the top of the hill and walk a distance of 600 feet. The work done by the force of gravity along the zig-zag path is how many times is the work going along the straight path? same 2 times 4 times 5 times 3 / 70 The Doppler Effect predicts that the spectrum of light from a visible body moving AWAY from the Earth will experience a shift in frequency when viewed from Earth. This particular shift is known as the: Red shift Blue shift Dirac shift None of the above 4 / 70 The oxygen in the earth’s atmosphere was probably produced by which of the following? meteors/comets photosynthetic organisms radioactive minerals all of the above 5 / 70 What is/are the objectives of using tubeless tires in aircraft?1. To reduce chances of detaching the tire from the rim2. To make them withstand shocks better3. To allow them to withstand heat.Select the correct option from the codes given below: Only 1 & 2 Only 2 & 3 Only 1 & 3 1, 2 & 3 6 / 70 At a point halfway between two identical point charges, the electric field is equal to: 0 half its maximum value its maximum value pointing away from the charges 7 / 70 Echoes are heard when we shout in an empty hall. But when the hall is full of people no echoes are heard why? Echoes are subdued in the noise of people Soft clothes of people absorb sound instead of reflecting it Destructive interference of sound takes place Excessive reverberations take place 8 / 70 The electric field of a point charge varies: linearly with distance and inversely with charge linearly with charge and inversely with distance squared linearly with distance and inversely with linearly with distance and inversely with charge squared 9 / 70 What percentage of the earth’s atmosphere does O2 comprise(Approx.)? 50 28 21 78 10 / 70 What happens to the period of a pendulum if the mass of the bob is quadrupled? period is doubled stays the same period is halved period increases four times 11 / 70 Two point masses, M1 and M2, are 14 centimeters apart. M1 has a mass of 2 grams. M2 has a mass of 5 grams. Locate the center of mass of this system. 4 cm from M1 4 cm from M2 5 cm from M1 5 cm from M2 12 / 70 What reflecting surface forms a geometrically perfect image of a point source located at infinity (such as that approximated by a star)? paraboloid elliipsoid spherical hyperboloid 13 / 70 A projectile is fired into the air at an angle of 23 degrees. At what other angle would this projectile have the same range if air resistance is neglected? 46 degrees 60 degrees 67 degrees 68 degrees 14 / 70 Of the following, the most energetic form of NON-IONIZING radiation is Near Ultra-Violet light Infra-red light Radio waves Microwaves 15 / 70 At one atmosphere, a cylinder with movable piston contains 2,000 milliliters of gas. If the pressure is increased to 5 atmospheres and the temperature remains unchanged, what is the new volume of the gas? 4000 ml 400 ml 1000 ml 100 ml 16 / 70 Carlos is pulling a 40-kilogram cart with a horizontal force of 100 Newtons. The force of friction on the cart is 20 Newtons. The acceleration of the cart is: 2 meters per second squared 4 meters per second squared 2.5 metres per second squared 20 metres per second squared 17 / 70 Which of the following statements with respect to the speed of light in various media is/are correct?It is greater in vacuum in comparison to glassIt is greater in hot glass in comparison to a cold glassSelect the correct option from the codes given below: Only 1 is correct Only 2 is correct Both 1 & 2 are correct Both 1 & 2 are incorrect 18 / 70 An electron is moved through a potential difference of 1 volt. How much energy in joules was used to move the electron? 1.6 x 10^-19 Joules 2.6 x 10^-19 Joules 1.6 x 10^-18 Joules 2.6 x 10^-18 Joules 19 / 70 Which of the following is correct about magnetic field lines? Magnetic field lines are closed curves Degree of closeness of the field lines shows the strength of the magnetic field Both A and B None of the above 20 / 70 The cosmic background radiation, a remnant of the Big Bang, is at what temperature? 270 K 2.7 K 0.27 K 27 K 21 / 70 The working of a jet airplane is based on First law of motion Second law of motion Third law of motion Law of gravitation 22 / 70 In space, heat is transferred by: conduction convection radiation all of the above 23 / 70 If you were watching a star collapsing to form a black hole, the light would disappear because of the light: is strongly redshifted is strongly blueshifted would turn black none of the above 24 / 70 An electron is classified as a boson fermion meson none of the above 25 / 70 The Andromeda Galaxy is which of the following types of galaxies? Spiral Elliptical Irregular Barred-spiral 26 / 70 The principle that energy may be converted from one form to another but it cannot be either created or destroyed is: Zeroth law of thermodynamics First law of thermodynamics Second law of thermodynamics Third law of thermodynamics 27 / 70 A 5 kilogram mass is lifted at constant velocity from a shop floor by a rope that passes through a pulley attached to the shop’s ceiling. Neglecting the mass of the rope and friction in the pulley, what is the approximate tension in the rope? 100 N 5 N 25 N 50 N 28 / 70 The first reflecting telescope was built by: Galileo Copernicus Edwin Hubble Isaac Newton 29 / 70 Rounded to the nearest day, one mercurial year is equal to: 111 days 88 days 67 days 27 days 30 / 70 Consider a car driving around a circular bend in the road. Which of the following CANNOT be constant? Speed of the car velocity of the car non-relativistic mass of the car angular momentum of the car 31 / 70 In the Compton Effect, a photon of wavelength λ collides with a stationary electron. The wavelength of the emitted photon is: the same as λ longer than λ shorter than λ no photon is emitted 32 / 70 How many atoms per unit cell are in a face-centered-cubic crystal? 2 4 6 8 33 / 70 The same side of the moon always faces the Earth because: the moon is not rotating about its axis. the moon’s motion was fixed at its creation by the laws of inertia tidal forces keep the moon’s rotation and orbiting motion in sync with each other. the moon’s magnetic poles keep aligned with the Earth’s magnetic field 34 / 70 A string of length L is fixed between two points. If a standing wave of 5 nodes is produced, what is the relationship between the string’s length, L, and its wavelength? 0.4 L 0.1 L 0.5 L 0.2 L 35 / 70 The magnitude of the quarks’ electric charge is Zero greater than electron’s charge less than electron’s charge equal to the electron’s chage 36 / 70 The dominant charge carriers in p-type semiconductors are neutrons electrons protons holes 37 / 70 Which of the following is the most important erosional and transportation agent? wind water glaciers other living organisms 38 / 70 A space ship traveling toward Mars at 0.6 times the speed of light c shoots an ELECTRON beam at Mars. If the electrons travel at 0.6 C RELATIVE TO THE SPACE SHIP, at what speed do the electrons impact the surface of Mars? 0.6 C 0.88 C 1.2 C 1.34 C 39 / 70 An automobile needs an antenna for its radio to play properly because: The automobile’s tires insulate it from the ground The automobile’s body acts as a Faraday cage When the automobile moves, the velocity of the radio signal appears changed with respect to when it is at rest The transmitter also uses an antenna 40 / 70 According to Kepler’s Laws, the cube of the mean distance of a planet from the sun is proportional to the: area that is swept out cube of the period square of the period fourth power of the mean distance 41 / 70 Rest mass energy of an electron is 1.2 MeV 0.511 MeV 2.02MeV 1.6 MeV 42 / 70 If we look at the floating piece of iceberg on the sea, approximately what fraction of it is visible above the seawater level? 1/8th 1/6th 1/25th 1/10th 43 / 70 A 10-kilogram object falls from a cliff 100 meters high. At the midpoint of its fall its total energy is: 1000 Joules 10000 Joules 5000 Joules 50000 Joules 44 / 70 What is the hydrostatic pressure at the bottom of a pool 6 meters deep? 60000 N per metre squared 6000 N per metre squared 600 N per metre squared 60 N per metre squared 45 / 70 A LED lamp produces 300 lumens of light per watt, which makes it about 20 times as efficient as an incandescent lamp and four times as efficient as the fluorescent tube. What is the reason for this? Electricity is directly converted to light particles in LED The resistance of the filaments used in LED is very small Presence of mercury in LED lamp makes it efficient Materials used for LED production have very high refractive indices 46 / 70 Planck’s constant was first introduced in order to obtain a correct theoretical prediction of the distribution of frequencies occurring in black body radiation the energy produced by the transformation of mass into energy the speed of light lifetime of the neutron 47 / 70 A man picks up a 50-kilogram block and carries it up a flight of stairs 10 meters high. He then carries the block back down the stairs and places the block in its original position. What is the NET work done on the block? 0 Joules 750 Joules 500 Joules 1000 Joules 48 / 70 At a point directly east of a negative point charge, the electric field points in what direction? East West North South 49 / 70 For the hydrogen atom, which series describes electron transitions to the N = 2 orbit? Is it the: Lyman series Paschen series Balmer series Pfund series 50 / 70 The period from one full moon to the next is: 30.5 days 30 days 29.5 days 28.5 days 51 / 70 With reference to the phase changes in matter, which of the following is / are correct statements? When a liquid freezes, it releases thermal energy into its immediate environment.When a solid melts, it releases thermal energy into its immediate environment.When a solid melts, its temperature increasesSelect the correct option from the codes given below: Only 1 Only 1 & 2 Only 1 & 3 1, 2 and 3 52 / 70 Two bodies each have a mass M. If the mass of each body is doubles, the gravitational force of attraction between the two bodies will be: Double the original force Four times the original force 0.25 times the original force Unchanged 53 / 70 The shape of magnetic field around a long straight current-carrying wire is: Elliptical Square Circular Spring Shaped 54 / 70 The angle between the velocity and acceleration of a body is: never 90 degrees never 180 degrees sometimes 180 degrees never 0 degrees 55 / 70 A Pendulum Clock, whose pendulum is made up of a steel rod, will become slow if __:Temperature risesTaken from the equator to the poleTaken to moon only 1 only 1 and 3 1, 2 and 3 only 1 and 2 56 / 70 Which civilization developed and implemented the first solar calendar? Babylonian Egyptian Greek Aztec 57 / 70 Which one of the following laws best describes the operation of an electric generator? Ampere’s Law Gauss’s LAw Ohm’s Law Faraday’s Law of Induction 58 / 70 Light bends around sharp corners as a result of refraction diffraction scattering dispersion 59 / 70 With reference to nuclear energy production, what is the use of boiling water in a boiling water reactor (BWR)?1. As a coolant2. As a neutron moderatorSelect the correct option from the codes given below: Only 1 Only 2 Both 1 & 2 Neither 1 nor 2 60 / 70 The Grand Unified Theory of the forces of nature combines three of the four forces. Which force is NOT included? Gravitational force Electromagnetic force Weak nuclear force Strong nuclear force 61 / 70 A girl throws a 2-kilogram rock vertically upward. It reaches a maximum height of 5 meters. What is the kinetic energy of the rock the instant it leaves the girl’s hand? 100 Joules 10 Joules 1000 Joules 1 Joule 62 / 70 Which of the following is NOT an example of capillary action? Rise of ink in the fine pores of blotting paper soaking of water by a towel Wood swells in rainy season due to rise of moisture None of the above 63 / 70 The dimensions of gravitational constant G are: M-1L3T-2 ML3T-2 M0L3T-1 M-2L1T3 64 / 70 If the resultant force acting on a body of constant mass is zero, the body’s acceleration is: Increasing Decreasing Always zero Negative 65 / 70 Which of the following will increase the ANGULAR MOMENTUM of a person spinning on a rotatable frictionless bar chair? moving the arms closer to the body moving the arms farther from the body moving one arm farther from the body and the other arm closer to the body with spastic repetition none of the above 66 / 70 Which of the following is NOT closely associated with a non-magnetic Phase Diagram? Eutectic Temperature Solidus Liquidus Curves Curie Point 67 / 70 The index of refraction of a material is 1.5. The speed of light in this material relative to that in a vacuum is: 2 times 1.5 times 0.67 times 0.33 times 68 / 70 What is the relation between Time period(T) and angular frequency(ω) of a wave? T = 2π/ω T = 2πω T = π/2ω T = ω 69 / 70 Two identical resistors are connected in parallel and consume 200 watts together. A third identical resistor is added in parallel. The total power consumed is: 100 Watts 200 Watts 300 Watts 400 Watts 70 / 70 A proton and an alpha particle pass through the gap of a strong magnet. If both particles have the same initial velocity, how many times greater will the defection of the proton be relative to the deflection of the alpha particle? the same 2 times 4 times 8 times