Page 2 - WS CH 11 CLASS XI
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(a) YA=2YB
(b) YB=3YA
(c) YA=3YB
(c) YA=2YB
5 For an ideal liquid
(a) the bulk modulus is infinite.
(b) the bulk modulus is zero.
(c) the shear modulus is infinite.
(d) the shear modulus is zero.
2
6 A 4.0 m long copper wire of cross sectional area 1.5 cm is stretched by a force of 4.8
3
× 10 N stress will be
2
7
a. 4.4 × l0 N/m
2
b. 5.0 × l0 7 KN/m
2
c. 3.2 × l0 7 N/m
d. None of the above…
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2
Length of a wire is doubled, when 15 × 10 8 N/m stress is applied on it. Its Young’s
2
modulus of elasticity in N/m will be
8
a. 15 × 10
8
b. 10 × 10
8
c. 20 × 10
10
d. 25 × 10
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The ratio of radii of two wires of same material is 2: 1. If these wires are stretched by
equal force,than the ratio of stress produced are
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a. 4: 1
b. 1: 4
c. 1: 2
d. 2: 1
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The work done in increasing the length of a one meter long wire of cross-sectional
2
area 1mm through 1mm is
