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Find maximum amplitude for safe SHM (block does not topple during SHM) of a uniform cubical block of side ‘a’ on a smooth horizontal floor (spring is massless) Refer the figure given:

a)mg/3K b)2mg/3K c)3mg/K d)None Solution: c) 3mg/K... View Article

The work done in joules in increasing the extension of a spring of stiffness 10 N/cm from 4 cm to 6 cm.

Solution:... View Article

The vertical displacement of block A in meter is given by y=t^2/4, where t is in second. Calculate the downward acceleration of block B.

Solution: If block A moves by ‘y’, block b comes down by Yb=2*2*2*y= 8y Yb=8y=\frac{8t^{2}}{4}=2t^{2} VB=4t 4m/s^{2}... View Article

During the journey of a spaceship from earth to moon and back, maximum fuel consumed:

a) Against the gravitation of moon while reaching the moon b) Against the gravitation of earth in return journey c) Against the gravitation of... View Article

A track is mounted on a large wheel that is free to turn with negligible friction about a vertical axis. Consider a toy train of mass M placed on the track with the system initially at rest, the train’s electrical power is turned on. The train reaches speed v with respect to the track. What is the wheel’s angular speed if its mass is m and its radius is r? (Treat it as a hoop, and neglect the mass of the spokes and hub).

a) b) c) d) Solution: a) ... View Article

The radius vector drawn from the sun to a planet sweeps out ________ areas in equal time.

a) Lesser b) Greater c) Unequal d) Equal Solution d) Equal Kepler's 2nd law of planetary motion states that a radius vector drawn from the sun... View Article

Which of the following, Huygens wave theory could not explain?

a) Interference of light b) Refraction of light c) Double refraction d) Reflection of light Solution c) Double refraction. Huygens wave theory... View Article

Imagine a new planet having the same density as that of earth but it is 3 times bigger than the earth in size. If the acceleration due to gravity on the surface of earth is g and that on the surface of the new planet is g’ then what would be the relation between them?

Solution: If the mass and radius of the new planet be {M^'} and {R^'}, then for same density as earth Now for Earth, =3g... View Article

Calculate the total energy UB and the energy density Up of the magnetic field stored in a solenoid 0.5 m long, having 5000 turns and a current 10A. (radius of the solenoid is 4 cm).

Solution: E=15.7 joules... View Article

The magnetic susceptibility of a paramagnetic material at −73 degree C is 0.0060 and its value at −173 degree C will be

Solution:... View Article

An inductor of 30 mH is connected to a 220 V, 100 Hz ac source. What will be the inductive reactance?

Solution: Inductive reactance is given by the formula: =... View Article

State true or false: Polarised light can be used to study the helical surface of nucleic acids.

Solution: True. Polarised light is used to study helical structures of nucleic acids.... View Article

Two spherical conductors each of capacity C are charged to potential V and these are then connected by means of fine wire. What is the loss of energy?

Solution: Given C_{1} = C_{2} = C and V_{1} = V_{2} = V \Delta U=\frac{C*C(V+V)^{2}}{2(C+C)} =CV^{2}... View Article

What is the role of Mahatma Gandhi in the freedom struggle from period 1915 onwards with reference to non-cooperation movement, civil disobedience movement & quit india movement?

Answer: Initially Gandhi began to appeal to people by saying that we can attain salvation only through farmers and it is not going to come... View Article

Voting in the estates general was conducted on the principle of? a)Universal adult franchise b)Each estate one vote c)each member one vote d)each male one vote

Answer: The correct answer is option (b) - Each estate one vote King Louis XVI wanted to continue with the same practice of voting that was... View Article

Which of the following is true with reference to romanticism? a)Cultural Movement b)Freedom of individuals c)Freedom of markets d)None of the above

Answer: The correct answer is option (a) - Cultural Movement. To form a particular nationalist sentiment, a cultural movement arose which... View Article

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