2022
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May 23, 2022
If the gravitational force between two objects were proportional to 1/R (and not as 1/R2) where R is separation between...
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May 23, 2022
Distance of geostationary satellite from the surface of earth radius (Re =6400 km )in terms of Re) is (a) ...
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May 23, 2022
The distance between centre of the earth and moon is 384000 km. If the mass of the earth is 6...
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May 23, 2022
Given radius of Earth ‘R’ and length of a day ‘T’ the height of a geostationary satellite is [G–Gravitational Constant,...
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May 23, 2022
The orbital speed of an artificial satellite very close to the surface of the earth is V° . Then the...
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May 23, 2022
On applying a stress of 20×108 N/m2 the length of a perfectly elastic wire is doubled. Its Young’s modulus will...
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May 23, 2022
How much force is required to produce an increase of 0.2% in the length of a brass wire of diameter...
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May 23, 2022
A 5 m long aluminium wire ( Y=7×1010 N/m2) of diameter 3 mm supports a 40 kg mass. In order...
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May 23, 2022
Two similar wires under the same load yield elongation of 0.1 mm and 0.05 mm respectively. If the area of...
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May 23, 2022
A steel wire of lm long and cross section area is 1mm2 hang from rigid end. When weight of 1kg...
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May 23, 2022
Three rings each of mass M and radius R are arranged as shown in the figure. The moment of inertia...
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May 23, 2022
Four thin rods of same mass M and same length l, form a square as shown in figure. Moment of...
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May 23, 2022
A circular disc X of radius R is made from an iron plate of thickness t, and another disc Y...
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May 23, 2022
Two satellites of masses m1 and m2( m1>m2 ) are revolving round the earth in circular orbits of radius r1...
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May 23, 2022
A rubber pipe of density 1..5×103 N/m2 and Young’s modulus is 5×106 N/m2 suspended from the roof. The length of...
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May 23, 2022
A rod is fixed between two points at 20°C. The coefficient of linear expansion of material of rod is 1.1×10-5/°C...
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May 23, 2022
The coefficient of linear expansion of brass and steel are α1 and α2 . If we take a brass rod...
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May 23, 2022
A wire of cross-sectional area is 3mm2 first stretched between two fixed points at a temperature of 20°C. Determine the...
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May 23, 2022
3 particles each of mass m are kept at vertices of an equilateral triangle of side L. The gravitational field...
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May 23, 2022
The relation between λ,ηand K for a elastic material is (a) (1/η)=(1/3λ)+(1/9k) ...
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May 23, 2022
The ratio of two specific heats of gas CP/CV for argon is 1.6 and for hydrogen is 1.4. Adiabatic elasticity...
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May 23, 2022
The string of a simple pendulum is replaced by a uniform rod of length L and mass M. If the...
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May 23, 2022
A particle of mass 10 g is kept on the surface of a uniform sphere of mass 100 kg and...
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May 23, 2022
A force of 103 newton stretches the length of a hanging wire by 1 millimetre. The force required to stretch...
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May 23, 2022
The escape velocity from earth is ves. A body is projected with velocity 2 ves with what constant velocity will it...
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May 23, 2022
A planet has twice the radius but the mean density is 1/4 th as compared to earth. What is the...
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May 23, 2022
The acceleration due to gravity on a planet is same as that on earth and its radius is four times...
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May 23, 2022
The escape velocity for a body of mass 1 kg from the earth surface is 11.2 kms-1 The escape velocity...
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May 23, 2022
The escape velocity for the earth is ve . The escape velocity for a planet whose radius is four times...
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May 23, 2022
The radius of a planet is 1/4 of earth’s radius and its acceleration due to gravity is double that of...
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May 23, 2022
The escape velocity of a body on an imaginary planet which is thrice the radius of the earth and double...
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May 23, 2022
A mass of 6 × 1024 kg is to be compressed in a sphere in such a way that the escape...
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May 23, 2022
Two wires of the same material have lengths in the ratio 1 : 2 and their radii are in the...
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May 23, 2022
A steel ring of radius r and cross-section area ‘A’ is fitted on to a wooden disc of radius R(R>r)....
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May 23, 2022
The force required to stretch a steel wire of cross-section 1 cm2 to 1.1 times its length would be(Y=2×1011 N/m2) (a) 2×106...
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May 23, 2022
In steel, the Young’s modulus and the strain at the breaking point are 2×1011 N/m2 and 0.15 respectively. The stress at...
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May 23, 2022
Poly – β – hydroxybutyrate – co – β hydroxyvalerate is (PHBV) is a copolymer of a. 3 – hydroxbutanoic...
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May 23, 2022
The ratio of the radii of planets A and B is k1 and ratio of acceleration due to gravity on...
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May 23, 2022
How many times is escape velocity ( Ve ) , of orbital velocity (V0 )for a satellite revolving near earth (a)...