May 2022
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May 23, 2022
A copper wire of length 4.0m and area of cross-section 1.2 cm2 is stretched with a force of 4.8×103N. If...
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May 23, 2022
A planet moves around the sun. At a given point P, it is closest from the sun at a distance...
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May 23, 2022
If the interatomic spacing in a steel wire is 3.0Å and Ysteel =20×1010 N/m2  then force constant is (a) 6×10-2...
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May 23, 2022
The earth revolves about the sun in an elliptical orbit with mean radius 9.3 × 107 in a period of...
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May 23, 2022
The figure shows the motion of a planet around the sun in an elliptical orbit with sun at the focus....
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May 23, 2022
c HCl molecule about an axis passing through its centre of mass and perpendicular to the line joining the H+...
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May 23, 2022
The distance of neptune 1013 and 1012 saturn from sun are nearly  and  meters respectively. Assuming that they move in circular...
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May 23, 2022
When a satellite going round the earth in a circular orbit of radius r and speed v loses some of...
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May 23, 2022
In planetary motion the areal velocity of position vector of a planet depends on angular velocity (ω) and the distance...
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May 23, 2022
Two planets at mean distance d1 and d2Â Â from the sun and their frequencies are n1 and n2 respectively then Answer:...
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May 23, 2022
(a) Antheridia                        (b) Capsule (c)  Protonema                       (d) Archegonium Ans. d (8)
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May 23, 2022
(a) Hydrophobic                    (b) Sensitive to touch (c)  Hygroscopic                      (d) None of the above Ans. c (8)
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May 23, 2022
Potential energy of a satellite having mass ‘m’ and rotating at a height of 6.4 × 106m from the earth...
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May 23, 2022
A satellite with kinetic energy Ek is revolving round the earth in a circular orbit. How much more kinetic energy...
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May 23, 2022
If the gravitational force between two objects were proportional to 1/R (and not as 1/R2)Â 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 ) Â 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...