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SSC CGL Exam  >  SSC CGL Tests  >  SSC CGL Previous Year Papers  >  Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - SSC CGL MCQ

Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - 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) - 1

Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 for SSC CGL 2024 is part of SSC CGL Previous Year Papers preparation. The Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 questions and answers have been prepared according to the SSC CGL exam syllabus.The Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 MCQs are made for SSC CGL 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 below.
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Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 1
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Which telescope was invented by Isaac Newton in the 17th century by using a concave mirror to collect light instead of a simple lens which produces false colors due to the dispersion of light?
[SSC CHSL 09/08/2023 (3rd shift)]

Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 1
Reflecting telescope - Uses mirrors which cause light to reflect at different angles within the optical tube and extends the overall light path. Two major types of telescopes: Reflecting Telescopes and Refracting Telescopes (used lenses to magnify objects).
Infrared telescope: Uses infrared light to detect celestial bodies.
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 2
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The minimum distance of distinct vision for a young adult person with no defect in eyes is:
[SSC CHSL 11/08/2023 (4th shift)]

Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 2
For a normal eye, the far point is at infinity and the near point of distinct vision is about 25 cm in front of the eye.
Hypermetropia (far-sightedness): When the point goes farther from 25 cm. Lens used: Convex.
Myopia (Nearsightedness): Near objects appear clear, but objects farther away look blurry. Lens used: Concave.
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Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 3
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Which color of light from VIBGYOR has minimum energy?
[SSC CHSL 14/08/2023 (1st shift)]

Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 3
It has the longest wavelength and least energy of the visible colors of light.
Wavelength - The distance between two successive crests or troughs.
Violet has the shortest wavelength.
Frequency - It refers to the number of waves passing through a point per second.
Violet has the highest frequency.
The white light consists of 7 colors VIBGYOR (Violet - Indigo - Blue -Green - Yellow - Orange - Red).
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 4
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Which of the following pair of position of object – position of image – size of image, is NOT correct for concave mirror? [SSC CPO 10/11/2022 (Morning)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 4

At infinity - At C - Highly diminished. Spherical mirrors are of two types, concave and convex. Image formation by Concave Mirror (Object Position - Image Position - Image Nature and Size) : (At Infinity - At F - Real, point size); (Beyond Center C - Between C and F (Focus) - Diminished, Real and Inverted); (On Centre - Real, inverted, and same size); (Between Centre (C) and Focus (F) - Beyond Centre - Real, inverted, and larger); (on Focus - Infinity -Real, inverted, and enlarged); (On Focal length (Between Pole and Focus) -Behind Mirror - Virtual, straight and enlarged).

Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 5
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The splitting of white light into its component colours is called ______. [SSC MTS 12/07/2022 (Morning)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 5

Dispersion. Refraction -Redirection of a wave as it passes from one medium to another.
Reflection -When a ray of light approaches a smooth polished surface, it bounces back.

Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 6
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What is the full form of LED?
[SSC MTS 27/10/2021 (Morning)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 6
Light-emitting Diode (LED) - A semiconductor device, which can emit light when an electric current passes through it. Working principle - Electroluminescence.
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 7
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Which phenomenon deals with the scattering of light by molecules of a medium when they are excited to vibrational energy levels?
[SSC CGL 24/08/2021 (Evening)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 7
Raman Effect. Huygens' principle states that every point on a wavefront may be considered as a source of secondary waves. Maxwell Effect is a phenomenon of electromagnetic induction in which an electric charge, near a solenoid in which current changes slowly, feels an electromotive force (e.m.f.) even if the magnetic field is practically static inside and null outside. Rayleigh Effect is a phenomenon of scattering of light or other electromagnetic radiation by particles much smaller than the wavelength of the radiation.
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 8
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_______ expansion makes the Eiffel Tower taller during summers.
[SSC CGL 04/03/2020 (Morning)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 8
Thermal expansion is a phenomenon due to which the metal expands when heated and contracts when cooled. The Eiffel Tower gets taller by up to 6 inches during the summer.
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 9
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In 1851, who founded the science of hydrodynamics with his law of viscosity describing the velocity of a small sphere through a viscous fluid?
[SSC CHSL 09/08/2023 (4th Shift)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 9
George Gabriel Stokes.
Daniel Bernoulli - Known for Bernoulli's principle. According to this principle, an increase in the speed of a fluid occurs simultaneously with a decrease in pressure or a decrease in the fluid's potential energy.
Evangelista Torricelli - Known for his invention of the barometer, a device used to measure atmospheric pressure.
Heinrich Gustav Magnus - Known for Magnus effect, an observable phenomenon that is commonly associated with a spinning object moving through the air or a fluid.
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 10
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Whose law states that total energy per unit mass of flowing fluid, at any point in the subsurface, is the sum of the kinetic, potential, and fluid-pressure energy and is equal to a constant value?
[SSC CGL 19/07/2023 (3rd shift)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 10
Daniel Bernoulli.
Torricelli's law - The parting speed of a jet of water, based on the distance below the surface at which the jet starts, assuming no air resistance, viscosity, or other hindrance to the fluid flow.
Pascal's law - The pressure applied to an enclosed fluid will be transmitted without a change in magnitude to every point of the fluid and the walls of the container.
Poiseuille's law - It gives the pressure drop in an incompressible and Newtonian fluid in laminar flow through a long cylindrical pipe of a constant cross-section.
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 11
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Which device is used to either break an electric circuit or to complete it?
[SSC MTS 08/05/2023 (Morning)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 11
Switch - It is a device used to interrupt the flow of electrons in a circuit.
Insulator - A material in which electric current does not flow freely. Examples - Glass, air, wood, plastic, and rubber.
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 12
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Identify the correct statement.
[SSC CGL Tier II 02/03/2023]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 12
The resistance of a wire is directly proportional to its length and inversely proportional to its cross-sectional area. Resistance is a measure of the opposition to current flow in an electrical circuit. It is measured in ohms (Ω).
Factors affecting resistance - Material's conductivity, Length, Cross-sectional area, and Temperature.
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 13
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The induced current is the highest when the direction of motion of the coil is: [SSC CGL Tier II  06/03/2023]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 13

The induced current is highest when the direction of motion of the coil is at 90° or perpendicular with respect to the magnetic field, as the flux cutting is maximum in this case. While it is minimum when the direction of motion of the coil is at 180° or parallel with respect to the magnetic field, as here the flux cutting by the coil will be minimum.

Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 14
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Whose law states that at a junction in an electric circuit, the sum of the currents flowing into the junction is equal to the sum of the currents flowing out of the junction?
[SSC CPO 10/11/2022 (Afternoon)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 14
Gustav Robert Kirchhoff. Kirchhoff's first law (Kirchhoff's junction rule) states that the sum of currents entering a junction is equal to the sum of currents leaving the junction. Kirchhoff's second law (Kirchhoff's loop rule) states that the sum of the potential differences around any closed loop is zero. Victor Franz Hess discovered cosmic rays.
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 15
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Which of the following statements is correct regarding fuse wire?
[SSC CPO 11/11/2022 (Evening)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 15
The commonly used wire in the fuse is an alloy of tin (Sn) and lead (Pb). An electrical fuse is a safety device used to protect electrical systems by melting when the current exceeds a certain level.
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 16
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What happens to the magnetic field produced by a given current in the conductor when the distance increases?
[Graduate Level 05/08/2022 (Shift - 3)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 16
It decreases. The magnitude of the magnetic field produced at a given point increases as the current through the wire increases. Magnetic field is the region around a moving charge that generates a field. SI Unit of Magnetic Field Intensity - Tesla (T).
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 17
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The amount of work done in moving a charge of 4C across two points having a potential difference of 6V is ______.
[SSC MTS 05/07/2022 (Evening)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 17
Potential difference defined as the work done to move unit electric charge from one point to another in an electric circuit. It is given by: V = W/Q; i.e. W = V × Q; W= 6 × 4 = 24 joules.
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 18
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Which of the following laws is applicable to the force of attraction or repulsion between two point charges?
[SSC MTS 15/07/2022 (Evening)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 18

Coulomb's Law. According to Coulomb’s law, the force of attraction or repulsion between two charged bodies is directly proportional to the product of their charges and inversely proportional to the square of the distance between them. It acts along the line joining the two charges considered to be point charges .

Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 19
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In the symbol for the electric cell, the thicker, shorter line represents the:
[SSC MTS 26/10/2021 (Afternoon)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 19
Negative terminal. The longer, thinner line represents the positive terminal. An electric cell is a device, which converts chemical energy into electrical energy.
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 20
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What is the total charge of an electric dipole?
[SSC CHSL 11/08/2021 (Morning)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 20
0. An electric dipole is a pair of equal and opposite charges, therefore the total charge in an electric dipole will be zero.
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 21
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Electrical conductance through metals is called electronic conductance and it ______.
[SSC CPO 24/11/2020 (Evening)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 21
Metals are good conductors due to the presence of free electrons and when we increase the temperature, the metal ions start vibrating which leads to the increase in resistance so the conductivity is decreased.
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 22
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The relation between atm and bar is:
[SSC CHSL 04/08/2023 (3rd shift)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 22

1 atm = 1.013 bar. ‘bar’ and ‘atm’ are the units representing pressure. A pascal (SI Unit of pressure) is one newton of force acting on 1 square meter area. An atmosphere (atm) is a unit of measurement equal to the average air pressure at sea level at a temperature of 15 degrees Celsius. Atmospheric pressure drops as altitude increases.

Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 23
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Select the option that is true regarding the following two statements labelled Assertion (A) and Reason (R).
(A): An object slips less on a rough surface than a smooth surface.
(R): When a surface is rough, frictional force increases.
[SSC CGL 20/07/2023 (1st shift)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 23
Frictional force is the resistance encountered when two surfaces slide or attempt to slide against each other, resulting from the interaction between their roughness and molecular forces.
Formula - F (friction force) = μ (coefficient of friction) × N (normal force).
Normal Force - The force that surfaces exert to prevent solid objects from passing through each other.
Coefficient of friction : It is a measure of the amount of friction existing between two surfaces.
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 24
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The given equation provides the property of the motion of an object, traversing a circular path. What is 'v' in this equation ?(ac = v²/R) [SSC CGL 25/07/2023 (4th shift)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 24

Centripetal acceleration - That is directed towards the center of the circle. It is caused by the change in direction of the velocity vector as the object moves around the circle.
Centripetal Acceleration (ac) formula:
ac = v2/r
where v is the speed, r is the radius.
Dimensional formula of centripetal acceleration = [ M₀L¹T⁻² ].

Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 25
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Which type of friction is considered as a self-adjusting force?
[SSC MTS 15/05/2023 (Morning)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 25
Static Friction - Force that keeps an object at rest.
Kinetic Friction - It is a force that acts between moving surfaces.
Centripetal Friction - The frictional force supplies the centripetal force and is numerically equal to it.
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 26
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The substances which reduce friction are called ________.
[SSC MTS 16/06/2023 (Evening)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 26
Lubricants - Any substance that is physically integrated for the purpose of reducing friction between two or more moving surfaces. Examples - Grease and oil.
Fluid - Substances which can flow easily. Examples - Water, oil, air.
Magnet - Material that can produce its own magnetic field. Examples - Neodymium and samarium cobalt.
Spring - Device consisting of elasticity but made of rigid material.
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 27
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A ball possesses 3000 units of momentum. What would be the ball's new momentum if its velocity was doubled?
[SSC CHSL 10/03/2023 (3rd Shift)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 27
We know that Momentum is directly proportional to the object's mass (m) and velocity (v).
Momentum (p) = mass (m) × velocity (v).
And if velocity is doubled, momentum is also doubled.
Hence momentum = 2 × 3000 = 6000 units.
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 28
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Which of the following is NOT a non-contact force?
[SSC CHSL 15/03/2023 (4th Shift)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 28
Contact force - Any force that occurs as a result of two objects making contact with each other.
Examples - Friction force, Muscular force.
Non-contact force - The force applied on an object without any contact with it.
Examples - Magnetic force, electrostatic forces, gravitational force.
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 29
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Which of the following is the correct order of friction?
[SSC CHSL 20/03/2023 (2nd Shift)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 29
Static Friction: A force that hinders the movement of an object moving along the path.
Sliding Friction: Resistance created by any two objects when sliding against each other.
Rolling Friction: The force resisting the motion of a rolling body on a surface.
Thus, the order is Static > Sliding > Rolling.
Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 30
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Which physical theory explains the generation of thrust by rocket engines, jet engines and deflating balloons?
[SSC CPO 10/11/2022 (Afternoon)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Physics (2023-20) - 1 - Question 30
Third Law is often given as an explanation for the generation of thrust (to every action, there is an equal and opposite reaction).
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