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Set 6 of 6 · Questions 151-156 of 156

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JEE Main Physics · Mechanical Properties of Solids · Set 6 (Q151-156)

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  1. 151.
    Under the same load, wire A having length 5.0 m and cross section 2.5 x stretches uniformly by the same amount as another wire B of length 6.0 m and a cross section of 3.0 x stretches. The ratio of the Young's modulus of wire A to that of wire B will be:
    1. (1)1:4
    2. (2)1 : 1
    3. (3)1 : 10
    4. (4)1 : 2
  2. 152.
    A steel wire of length 3.2 m ( = 2.0 x ) and a copper wire of length 4.4 M ( = 1.1 x ), both of radius 1.4 mm are connected end to end. When stretched by a load, the net elongation is found to be 1.4 mm. The load applied, in Newton, will be: (Given )
    1. (1)360
    2. (2)180
    3. (3)1080
    4. (4)154
  3. 153.
    Consider two separate ideal gases of electrons and protons having same number of particles. The temperature of both the gases are same. The ratio of the uncertainty in determining the position of an electron to that of a proton is proportional to:-
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  4. 154.
    The force required to stretch a wire of cross-section 1 to double its length will be: (Given Yong's modulus of the wire = 2 x N/)
    1. (1)1 x N
    2. (2)1.5 x N
    3. (3)2 x N
    4. (4)2.5 x N
  5. 155.
    A certain pressure `P` is applied to 1 liter of water and 2 liter of a liquid separately. Water gets compressed to 0,01% whereas the liquid gets compressed to 0.03%. The ratio of Bulk modulus of water to that of the liquid is . The value of x is
  6. 156.
    A string of area of cross-section 4 and length 0.5 is connected with a rigid body of mass 2 kg. The body is rotated in a vertical circular path of radius 0.5 m. The body acquires a speed of 5 m/s at the bottom of the circular path. Strain produced in the string when the body is at the bottom of the circle is ...... x . (Use Young's modulus N/ and g=10 m/)