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Question

Young's modulus of steel is 1.9×1011 N/m2. When expressed in CGS units of dyne/cm2, it will be equal to

A
1.9×1010
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B
1.9×1011
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C
1.9×1012
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D
1.9×1013
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Solution

The correct option is C 1.9×1012
Given, Young's modulus Y=1.9×1011 N/m2
As we know that 1 N=105 dyne and 1 m=102 cm
So, converting the value to CGS we get
Y=1.9×1011×105 dyne(102)2 cm2
Y=1.9×1012 dyne/cm2

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