Young's modulus of steel is 1.9×1011N/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 C1.9×1012 Given, Young's modulus Y=1.9×1011N/m2 As we know that 1N=105dyne and 1m=102cm So, converting the value to CGS we get Y=1.9×1011×105dyne(102)2cm2 ⇒Y=1.9×1012dyne/cm2