Question

When the rubber band is stretched, it heats up and it cools down if it is suddenly released. This is depicted using:
A. The area under the hysteresis curve
B. The $x$ intercept of the hysteresis curve
C. The $y$ intercept of the hysteresis curve
D. The saturation point of the hysteresis curve

Answer 1

Hint: This question is based on the concept of hysteresis and hysteresis loop. Hysteresis is a phenomenon which occurs in the presence of a magnetic field. It is generally characterized by a lag of magnetization intensity (B) behind the magnetic field intensity (H).

Complete answer:
Hysteresis is the phenomenon in which magnetization intensity (B) lags behind magnetic field intensity (H). The hysteresis loop depicts the relationship between magnetization strength and the magnetic field. The loop is created by measuring the magnetic flux emitted by the ferromagnetic material as the external magnetizing field is changed.

Hysteresis loop also helps in identifying the loss in energy or the work done in the context of certain elastic properties such as retentivity and coercivity. Since the area under the hysteresis curve shows the loss in energy, it also depicts the reason behind cooling down the rubber band when it is released suddenly after stretching.

Hence, option A is correct.

Note: Since rubber (or other elastomers) has pronounced hysteresis and does not return all of the absorbed compression energy on the rebound, small vehicle suspensions using rubber (or other elastomers) can achieve the dual purpose of springing and damping.Mountain bikes, like the original Mini car, frequently use elastomer suspension.