What will be energy stored in a strained wire?
Correct answer: A. 1/2 × Load × Extension
- A. 1/2 × Load × Extension
- B. 1/2 × Stress × Strain
- C. 1/2 × Load × Strain
- D. 1/2 × Load × Stress
Explanation
The energy stored in a strained wire is given by the formula 1/2 × Load × Extension. This formula is derived from the work done on the wire, which is the integral of force over distance. Option A correctly represents this relationship. In contrast, Option B represents the energy density, which is suitable for understanding the energy per unit volume within the material, not the total energy stored. Options C and D incorrectly relate the variables, as they fail to incorporate the correct physical relationships necessary for calculating the total energy stored in the wire.
Last updated
Related questions
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:
A ball falling in a lake of 200 m shows a decrease of 0.1% in its volume. The bulk modulus of elasticity of the material of the ball is: (take g = 10 m/s²)
A ball falling in a lake of 200 m shows a decrease of 0.1% in its volume. The bulk modulus of elasticity of the material of the ball is: (take g =10 m/s2)
A block weighing 40 kg extends a spring by 0.16m from its unscratched position. What is the value of k?
A body floats in a liquid contained in a beaker. The whole system, as shown, falls freely under gravity. The upthrust on the body due to the liquid is: