Shilpa
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May 23, 2022
A rubber cord catapult has cross-sectional area 25mm2 and initial length of rubber cord is It is stretched to and...
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May 23, 2022
Two wires A and B are of same materials. Their lengths are in the ratio 1 : 2 and diameters...
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May 23, 2022
The area of cross section of a steel wire (Y=2.0×1011 N/m2) is 0.1 cm2 . The force required to double its...
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May 23, 2022
(a) Length of the wire (b) Radius of the wire (c) Material of the wire (d) Shape of the cross...
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May 23, 2022
(a) Sliding of molecular layer is much easier than compression or expansion (b) Reciprocal of bulk modulus of elasticity is...
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May 23, 2022
(a) Length (b) Breadth (c) Shape (d) Volume Answer-c (6)
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May 23, 2022
A rod of length l and radius r is joined to a rod of length l/2 and radius r/2 of...
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May 23, 2022
(a) 0.002 (b) 0.004 (c) 0.008 ...
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May 23, 2022
A metal bar of length L and area of cross-section A is clamped between two rigid supports. For the material...
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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
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
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
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
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
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
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
Young’s modulus of rubber is 104 N/m2 and area of cross-section is 2 cm2 . If force of 2×105 dynes...
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May 23, 2022
For silver, Young’s modulus is 7.25×1010 N/m2 and Bulk modulus is 11×1010 N/m. Its Poisson’s ratio will be (a) –...
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May 23, 2022
The length of a wire is 1.0 m and the area of cross-section is 1.0×10-2 cm2 . If the work...
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May 23, 2022
46.A force of 200 N is applied at one end of a wire of length 2 m and having area...
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May 23, 2022
40. The interatomic distance for a metal is 3×10-10 m . If the interatomic force constant is 3.6×10–9 N/Å ,...
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May 23, 2022
Longitudinal stress of 1 kg/mm2 is applied on a wire. The percentage increase in length is (Y=1011 N/m2) (a) 0.002 ...
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May 23, 2022
33. An aluminum rod (Young’s modulus=7×109 N/m2) has a breaking strain of 0.2%. The minimum cross-sectional area of the rod...
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May 23, 2022
32. A rod of length l and area of cross-section A is heated from 0°C to 100°C. The rod is...
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May 23, 2022
31.The temperature of a wire of length 1 metre and area of cross-section is 1 cm2 is increased from 0°C...
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May 23, 2022
30. Increase in length of a wire is 1 mm when suspended by a weight. If the same weight is...
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May 23, 2022
29. An area of cross-section of rubber string is 2 cm2 . Its length is doubled when stretched with a...
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May 23, 2022
28. Steel and copper wires of same length are stretched by the same weight one after the other. Young’s modulus...