A 4.0 m long wire is subjected to stretching force and its length increases by 40 cm. The percent elongation which the wire undergoes is:
Correct answer: C. 10 %
- A. 0.10 %
- B. 40 %
- C. 10 %
- D. 20 %
Explanation
Given:Original length = 4mChange in length = 40 cm = 0.4 mPercentage elongation = ?Formula:To calculate the percentage elongation, we need to divide the change in length of the wire by its original length and then multiply by 100 to express it as a percentage. So,Percentage elongation = (Change in length / original length) × 100Percentage elongation = (0.4 / 4) × 100 = 0.1 × 100 = 10%
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Solids are compared through crystal structure, amorphous arrangement, elasticity, plastic deformation, stress, strain and Young’s modulus. Electrical behavior depends on available charge carriers and band structure, so conductors, insulators and semiconductors must be distinguished from mechanical properties such as strength, stiffness and brittleness.
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