PHYSICS
JAMB 2022 - Question 23
Physics 2022 JAMB Past Questions - Question 23: If the stress on a wire is 10NM-² and the wire is stretched from its original length of 10.00 cm to 10.05 cm. The young’s modulus of the wire is
Choose the correct answers from the options given.
A:
B:
C:
D:
Correct Answer
D
Explanation
The Young's modulus (Y) of a material can be calculated using the formula:
Y = (stress / strain)
Where stress is the force applied per unit area (in this case 10â�· N/m²) and strain is the change in length relative to the original length (in this case (10.05 cm - 10.00 cm) / 10.00 cm = 0.005 / 10.00 = 0.0005).
So, Y = 10â�· N/m² / 0.0005 = 2 x 10¹¹ N/m².
Therefore, the Young's modulus of the wire is 2 x 10¹¹ N/m².
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