Question 3
A wire of length 2.00 m and radius 1.0 mm is stretched by 25.0 mm on application of a
force of 103 N. Calculate the Young’s modulus for the wire.
Observation
The question was popular among the candidates but it was poorly attempted. Conversion of units from mm to m and appropriate equation Y = were the problems. Though few were able to write the correct equation.
The expected answers are:
3. Young’s Modulus = = 2.55 x 1010 Nm-2