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SSC CGL Exam  >  SSC CGL Tests  >  SSC CGL Previous Year Papers  >  Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - SSC CGL MCQ

Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - SSC CGL MCQ


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30 Questions MCQ Test SSC CGL Previous Year Papers - Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2

Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 for SSC CGL 2025 is part of SSC CGL Previous Year Papers preparation. The Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 questions and answers have been prepared according to the SSC CGL exam syllabus.The Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 MCQs are made for SSC CGL 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 below.
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Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 1
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The range of ______ force is of the order of 10−16 m.
[SSC CGL 13/04/2022 (Morning)]

Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 1

Weak Nuclear Force - Very Short 10-16 m (Range), 10-13 (Relative Strength).
Gravitational Force - Infinite (Range), 10-39 (Relative Strength).
Electromagnetic Force - Infinite (Range), 10-2 (Relative strength).
Strong Nuclear Force - Short Nuclear size 10-15m (Range), 1 (Relative Strength).

Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 2
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If two forces act on an object from opposite directions, then the magnitude of the net force acting on it is the ______ of the magnitudes of the two forces.
[SSC MTS 11/10/2021 (Morning)]

Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 2
Net force is the sum total of all the forces which are acting on the body. Forces applied on an object in the same direction add to one another.
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Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 3
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Among the given options, which one causes an echo?
[SSC MTS 04/09/2023 (1st Shift)]

Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 3
Echo: The sound is heard more than once because of the time difference between the initial production of the sound waves and their return from the reflecting surface. Applications of echo - Measuring Depth and Height, Measuring Distance, Medical Diagnosis.
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 4
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Loudness of sound is proportional to the ______ of the amplitude of the vibration producing the sound.
[SSC MTS 11/07/2022 (Evening)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 4
The loudness of sound is expressed in the units called the Decibel. The symbol of the decibel is dB. The sound pressure level of audible sound ranges from 0 dB through 120 dB.
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 5
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Vibration of which among the following produces only odd harmonics?
[SSC CPO 24/11/2020 (Morning)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 5
In the first mode of vibration of the air column, there is one node and one antinode. In the second mode of vibration of the air column, two nodes and two antinodes are formed. This shows that only odd harmonics are present in the modes of vibrations of the air column closed at one end.
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 6
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The sound of thunder is heard much later than the flash of light is visible. What does it represent?
[SSC MTS 27/10/2021 (Afternoon)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 6
The speed of sound in air is about 343 meters per second. Light travels at a speed of 300,000 km/s (186,000 mi/s) from a stationary source.
Time taken by Light - Moon to Earth: 1.3 seconds and Sun to Earth (1 AU): 8.3 minutes.
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 7
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Identify the INCORRECT statement for the universal law of gravitation.
[SSC CPO 05/10/2023 (Afternoon)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 7

Newton's law of universal gravitation - Any particle of matter in the universe attracts another one with a force varying directly as the product of the masses and inversely as the square of the distance between them. G is denoted as the gravitational constant.
Value of G = 6.67×10⁻¹¹ Nm²/kg². Tides are caused by the combined gravitational attraction of the Sun and Moon on the Earth.

Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 8
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Which instrument was used to detect gravitational waves for the very first time?
[SSC CHSL 17/03/2020 (Evening)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 8

LIGO (Laser Interferometer Gravitational-Wave Observatory) is a large-scale physics experiment and observatory to detect cosmic gravitational waves and to develop gravitational-wave observations as an astronomical tool.

Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 9
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What kind of energy is associated with falling coconuts, speeding cars, rolling stones, and flying aircraft?
[SSC CGL Tier II 26/10/2023]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 9

Kinetic Energy - The energy an object has because of its motion.
Potential Energy: Energy stored in an object due to its position or condition.
Examples - Arrow and the stretched string on the bow, water at the top of the waterfall.
Radiant Energy: Energy of electromagnetic and gravitational radiation.
Examples - Produce heat, light, rays.
Elastic Energy: Energy stored in an object due to a force that temporarily changes its shape.
Example - Compressed spring, archer's stretched bow.

Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 10
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If 7 N force is applied on a brick and it moves through 5 m, then what will be the work done ? [SSC MTS 01/09/2023 (3rd Shift)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 10

Given, Force applied on a brick (F) = 7 N, Displacement (s) = 5 m.
Angle (θ) = 0°.
Since, Work done = Force × displacement × cos θ,
⇒ Work done = 7 × 5 × cos 0°, (cos 0° = 1)
⇒ Work done = 35 joules.

Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 11
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When one stone is thrown upwards, what type of energy conversion would occur ?
[SSC MTS 12/09/2023 (3rd Shift)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 11

Kinetic energy (K.E.) is directly proportional to the mass of the object and to the square of its velocity: K.E. = 1/2 m v² ( “m” - mass of the object, “v” - velocity), Unit is joule (J). Examples: walking, falling, Flying airplane.
Gravitational potential energy (GPE) = m⋅g⋅h (here, m is mass in kilograms, g is the acceleration due to gravity (9.8 m/s² on earth), h is the height above the ground in meters).

Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 12
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The given equation describes the _________ relation. s = u t + 1/2 a t²
[SSC CHSL 03/06/2022 (Morning)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 12

Position-time. There are three equations of motion (given by Isaac Newton) that can be used to derive components such as displacement(s), velocity (initial and final), time(t), and acceleration(a).
First: v = u + at (velocity-time),
Second: s = ut + ½ at² (position-time),
Third: v² = u² + 2as (position-velocity).

Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 13
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Kinetic and potential energies of a body are the components of its ______ energy.
[SSC MTS 18/10/2021 (Evening)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 13
Mechanical (KE + PE).
Kinetic energy (KE) is energy possessed by an object in motion (KE = 1/2 mv²).
Potential energy (PE) is the stored energy that depends upon the relative position of various parts of a system (PE = mgh where m is the mass, g is the acceleration, and h is the height).
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 14
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The objects which repeat its motion after some time are called
[SSC MTS 15/06/2023 (Evening)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 14
Examples: A rocking chair, a bouncing ball, a vibrating tuning fork.
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 15
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A simple pendulum consists of a small metallic ball or a piece of stone suspended from a rigid stand by a thread. The metallic ball is called the ______ of the pendulum.
[SSC MTS 18/10/2021 (Afternoon)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 15
Bob. Other Terminology of Pendulum: Pivot - The point of attachment from which a pendulum swings, Amplitude - The distance from which the pendulum is released from the vertical. A Pendulum is a mechanical system, its motion is oscillatory motion.
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 16
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The ‘to and fro’ or ‘back and forth’ motion of an object is termed as:
[SSC MTS 26/10/2021 (Afternoon)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 16
Vibration. Convulsions are rapid involuntary muscle contractions. Impulse is the change of momentum of an object when the object is acted upon by a force for an interval of time. Swings work by converting potential energy into kinetic energy and vice versa continuously.
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 17
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______ are also known as heat waves.
[SSC CPO 25/11/2020 (Evening)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 17
Infrared waves. When materials are exposed to infrared radiation, the water molecules of the material absorb this radiation, which results in the increase of thermal motion of the water molecules in that material. This is why infrared radiation is also known as heat waves.
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 18
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Which of the following represents an alpha particle?
[SSC CPO 25/11/2020 (Morning)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 18

Alpha particles consist of two protons and two neutrons bound together into a particle exactly like a helium nucleus. They are generally produced during the process of alpha decay.

Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 19
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In 1830, which American scientist created the world's most powerful electromagnet, the Albany magnet, which could lift up to 750 pounds of metal at a time?
[SSC CHSL 09/08/2023 (4th shift)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 19
Joseph Henry, renowned for his discovery of self-inductance in electric circuits and his work on electromagnets like Albany and Yale magnets.
John Cockcroft was a British physicist, who won the Nobel Prize (1951) in Physics for splitting the atomic nucleus. William Gilbert - the inventor of the term "electricity". Edward Purcell, an American physicist, won the Nobel Prize (1952) for Physics for discovery of nuclear magnetic resonance in liquids and solids.
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 20
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Which experiment was designed to trace the motion of the earth through the 'luminiferous aether", a theoretical substance necessary for the transmission of light?
[SSC CHSL 04/08/2023 (2nd shift)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 20
-Michelson and Morley experiment - They tried to explain that Earth moved around the sun on its orbit, and the flow of substances like ether across the Earth’s surface could produce a detectable ‘ether wind’.
-Maxwell and Hertz experiment - Maxwell had proved that light was an electromagnetic wave and Hertz measured Maxwell's waves and explained that the velocity of these waves was equal to the velocity of light.
-Faraday and Henry Experiments - Electromagnetic Induction.
-Marconi used radio waves to transmit signals over several kilometers.
-J.J. Thomson discovered the negatively charged part of the atom (the electron).
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 21
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In 1851, who discovered the phenomenon of Eddy currents which flow in closed loops within conductors in planes perpendicular to the magnetic field? [SSC CHSL 14/08/2023 (3rd shift)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 21

Leon Foucault also discovered the Gyroscope.
Famous scientists and discoveries:
Nikola Tesla -AC Power (alternating current), Tesla Coil, Magnifying Transmitter.
Albert Einstein - Theory of relativity and the concept of mass-energy equivalence (E = mc2);
J.J Thomson - Electron.
Ernest Rutherford (father of nuclear physics) -Discovered alpha and beta rays, set forth the laws of radioactive decay and identified alpha particles as helium nuclei.
John Dalton - Theory on atoms.

Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 22
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Who found an empirical relationship between the half-life of alpha decay and the energy of the emitted alpha particles in 1911?
[SSC CGL Tier II 07/03/2023]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 22
Alpha decay spontaneously emits excessive energy by emitting the alpha particle, in which an atomic nucleus emits an alpha particle (helium nucleus) and 'decays' into a different atomic nucleus.
Ernest Orlando Lawrence - Nobel Prize in Physics (1939) for the invention of the cyclotron.
Sir James Chadwick - Nobel Prize in Physics (1935) for discovery of the neutron.
William Aston - Nobel Prize in Chemistry (1922) for the discovery of isotopes in several non-radioactive elements.
Frederick Soddy was the first to announce the concept that atoms can be identical chemically and yet have different atomic weights.
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 23
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Who was famous for the invention of the vacuum pump in the 17th century and also pioneered the concept of the absolute vacuum of space, measured the weight of air and used air pressure to predict the weather?
[SSC CHSL 08/06/2022 (Morning)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 23
John Cockcroft and Ernest Walton developed a device, an accelerator, to generate more penetrating radiation.
Enrico Fermi started the world's first man-made nuclear reactor in 1942.
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 24
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The discovery and understanding of electromagnetic induction is based on a long series of experiments carried out by ______.
[SSC CPO 24/11/2020 (Evening)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 24
The principle of electromagnetic induction states that the EMF induced in a loop by a changing magnetic flux is equal to the rate of change of magnetic flux threading the loop.
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 25
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What did Wilhelm Conrad Roentgen discover?
[SSC CHSL 19/03/2020 (Afternoon)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 25
Wilhelm Conrad Roentgen was a German mechanical engineer and physicist who in 1895 produced and detected electromagnetic radiation in a wavelength range known as X-rays, an achievement that earned him the first Nobel Prize in Physics in 1901.
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 26
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Superconductivity was discovered by ______, who was also awarded the Nobel Prize for Physics in 1911.
[SSC CHSL 26/10/2020 (Afternoon)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 26
Superconductivity - A phenomenon in which certain substances (conductor of electricity) offer zero resistance when they cool below a specific temperature level called the critical temperature (Tc).
Examples of superconductors: Aluminum, Niobium, Mercury.
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 27
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Who among the following scientists invented the Cotton Gin?
[SSC CGL 05/03/2020 (Evening)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 27
The cotton gin is a machine that revolutionized the production of cotton by greatly speeding up the process of removing seeds from cotton fiber.
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 28
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Who among the following scientists invented Kevlar?
[SSC CGL 06/03/2020 (Evening)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 28
Stephanie Kwolek was a chemist at the DuPont company in Wilmington, Delaware, when she invented the stronger-than-steel fiber in 1965.
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 29
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1 kilowatt is equivalent to:
[SSC CPO 05/10/2023 (Morning)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 29
1 kilowatt-hour is defined as the energy consumed by a device of power 1 kilowatt in 1 hour. A kilowatt is a unit of Electric Power.
1 kW = 1000 watts,
Watt = Joule/second,
1 Horsepower = 746 watts.
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 30
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The Units of Linear momentum are measured in __________.
[SSC MTS 05/09/2023 (1st Shift)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 2 - Question 30
Linear momentum is a vector quantity and is defined as the product of the mass of an object (m) and its velocity (v).
Units of linear momentum = Mass × Velocity = kg × m/s = kg m/s.
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