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  • SSC CGL Exam General Awareness Study Material

Digitization help student to explore and study their academic courses online, as this gives them flexibility and scheduling their learning at their convenience. Kidsfront has prepared unique course material of General Awareness Physics for SSC CGL Exam student. This free online General Awareness study material for SSC CGL Exam will help students in learning and doing practice on Physics topic of SSC CGL Exam General Awareness. The study material on Physics, help SSC CGL Exam General Awareness students to learn every aspect of Physics and prepare themselves for exams by doing online test exercise for Physics, as their study progresses in class. Kidsfront provide unique pattern of learning General Awareness with free online comprehensive study material and loads of SSC CGL Exam General Awareness Physics exercise prepared by the highly professionals team. Students can understand Physics concept easily and consolidate their learning by doing practice test on Physics regularly till they excel in General Awareness Physics.


Physics
An electron microscope gives higher magnifies than an optical microscope because :

a) The velocity of electrons is smaller than that of light
b) The wavelength of electrons is smaller as compared to the wavelength of visible light
c) The electrons have more energy than the light particulars
d) The electron microscope uses more powerful lenses


✔Answer
✔Solution
Correct Answer Is : The wavelength of electrons is smaller as compared to the wavelength of visible light
Solution Is : An electron microscope is a microscope that uses a beam of accelerated electrons as a source of illumination. Because the wavelength of an electron can up to 100,000 times shorter than that of visible light photons, the electron microscope has a higher resolving power than a light microscope and can reveal the structure of smaller objects.
A reversible and an irreversible engine are working between the same limits of temperature. The efficiency of

a) The reversible engine is greater than the irreversible engine
b) Each engine is 100%
c) The irreversible engine is greater than the reversible engine
d) The two engines is equal


✔Answer
✔Solution
Correct Answer Is : The reversible engine is greater than the irreversible engine
Solution Is : Carnot theorem states that no heat engine working in a cycle between two constant temperature reservoirs can be more efficient than a reversible engine working between the same reservoirs.
The first law of thermodynamics is simply the case of

a) Charle`s law
b) Newton`s law of cooling
c) The law of heat exchange
d) The law of conservation of energy


✔Answer
✔Solution
Correct Answer Is : The law of conservation of energy
Solution Is : The first law of thermodynamics is a version of the law of conservation of energy for thermodynamic systems. It states that the change in the internal energy of a system is equal to the heat added to the system plus the work done on the system.
Total internal reflection can not take place When light goes from :

a) glass to water
b) Water to glass
c) Water to air
d) Glass to air


✔Answer
✔Solution
Correct Answer Is : Water to glass
Solution Is : For total internal reflection to occur the light must travel from a dense medium to a less dense medium. It will not happen for light travelling from water towards glass
Liberty stands for

a) Absence of restraint
b) Consists in the presence of restraint
c) Feeling enjoyed in a congenial atmosphere
d) The eager maintenance of that atmosphere in which men have the opportunity to be their best selves-Laski


✔Answer
✔Solution
Correct Answer Is : The eager maintenance of that atmosphere in which men have the opportunity to be their best selves-Laski
Solution Is : Liberty, according to Laski, "is the eager maintenance of that atmosphere in which men have the opportunity to be their best selves", It means enjoyment of those rights and presence of those opportunities which help men to grow, to be the best of themselves, to develop their faculties and to plan their Lives as they deem best, provided such rights do not infringes similar rights of others.
Which one of the following kinds of equality is not compatible with the liberal notion of equality

a) Legal Equality
b) Political Equality
c) Social Equality
d) Economic Equality


✔Answer
✔Solution
Correct Answer Is : Economic Equality
Solution Is : The liberal notions of equality is linked to legal and political equality which were invoked in the 18th and 19th centuries to bring rule of law, citizenship, voting rights, etc, considered essential for democracy. However, when demands for equality in other dimensions, namely social and economic, were raised in the 19th century by the workers, Lord Acton, Alex de Tocqueville and others vehemently opposed them. Laissez faire was found incompatible with economic redistribution and so found opposed to economic equality .
If both the mass and the velocity of a body is increased to twice of their magnitude, the kinetic energy will increase by

a) 2 times
b) 4 times
c) 8 times
d) 16 times


✔Answer
✔Solution
Correct Answer Is : 16 times
Solution Is : If m be the mass and v be the velocity, then Kinetic Energy is given by KE 1/2 (mv2) = 1/2 (2m x 4v2) 8/2mv2 = 4mv2 So if both mass and velocity and doubled, the kinetic energy increases by 4 times.
Two bodies kept at a certain distance feel a gravitational force F to each other. If the distance between them is made double the former distance, the force will be

a) 2 F
b) 1/2 F
c) 4 F
d) 1/4 F


✔Answer
✔Solution
Correct Answer Is : 1/4 F
Solution Is : Gravitational force F= G x m?m?/d2 where F is the gravitational force, m? and m? are the masses of two objects. G is the Universal gravitational constant and d is the distance between the two objects. Since the gravitational force is inversely proportional to the square of the distance, if the distance between the two bodies is doubled, the force of gravity is reduced to one fourth its original value.
Stationary wave is formed by

a) A transverse wave superposing a longitudinal wave
b) Two waves of the same speed superposing
c) Two waves of same frequency travelling in the same direction
d) Two waves of same frequency travelling in the opposite direction


✔Answer
✔Solution
Correct Answer Is : Two waves of same frequency travelling in the opposite direction
Solution Is : Stationary or standing waves are formed in a medium when two waves having equal amplitude and frequency moving in opposite directions along the same line, interfere in a confined space. Generally, such waves are formed by the superposition of a forwarded wave and the reflected wave. Both longitudinal and transverse types of waves can form a stationary wave.
Which of the following is the maximum number of electrons that can be present in M-shell ?

a) 2
b) 8
c) 18
d) 32


✔Answer
✔Solution
Correct Answer Is : 18
Solution Is : The maximum number of electrons that can occupy a specific energy level can be found using the following formula; Electron capacity = 2 n 2. The variable n represents the principal Quantum Number, the number of the energy level in question. Since the M-shell belongs to 3 rd energy level its electrons capacity = 2 x 32 = 18
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