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Mechanical Properties of Solids · Question 10

AIPMT 2015 (Cancelled)MCQEasy📈 Topic in 0% papers+4−1
1

The approximate depth of an ocean is 2700 m. The compressibility of water is 45.4 10-11 Pa-1 and density of water is 103 kg/m3. What fractional compression of water will be obtained at the bottom of the ocean?

  1. 1.2 10-2
  2. 1.4 10-2
  3. 0.8 10-2
  4. 1.0 10-2

Answer

(1) 1.2 10-2

Solution

Pressure at the bottom (excess over the surface): P = h g = 2700 103 9.8 = 2.646 107 Pa

Compressibility k = 1B = V/VP

VV = kP = 45.4 10-11 2.646 107

= 1.2 10-2

Answer: (1)

AIPMT 2015 (Cancelled)

Keep practising — Mechanical Properties of Solids

2

Copper of fixed volume V is drawn into wire of length l. When this wire is subjected to a constant force F, the extension produced in the wire is l. Which of the following graphs is a straight line ?

  1. l versus 1l
  2. l versus l2
  3. l versus 1l2
  4. l versus l
AIPMT 2014
3

The following four wires are made of the same material. Which of these will have the largest extension when the same tension is applied?

  1. length = 200 cm, diameter = 2 mm
  2. length = 300 cm, diameter = 3 mm
  3. length = 50 cm, diameter = 0.5 mm
  4. length = 100 cm, diameter = 1 mm
NEET 2013
4

If the ratio of diameters, lengths and Young's modulus of steel and copper wires shown in the figure are p, q and s respectively, then the corresponding ratio of increase in their lengths would be [figure]

  1. ( 5q7sp2 )
  2. ( 7q5sp2 )
  3. ( 2q5sp )
  4. ( 7q5sp )
NEET 2013 (Karnataka)

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