Breaking strength of a wire is 105 N if its diameter is halved,what is the strength?
Correct answer: C. 1 x 10^5
- A. 4 x 10^5
- B. 2 x 10^5
- C. 1 x 10^5
- D. None of these
Explanation
The breaking strength of a wire is directly proportional to itscross-sectional area. When the diameter of the wire ishalved, the cross-sectional area is reduced by a factor offour (since the area is proportional to the square of thediameter). Therefore, the breaking strength also reduces bya factor of four, resulting in a new breaking strength of 1×105N.
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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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