In equilibrium the tensile stress to which a wire of radius r is subjected by attaching a mass ‘m’ is ____.
A. \(\frac{\mathrm{mg}}{\pi \mathrm{r}}\)
B. \(\frac{\mathrm{mg}}{2 \pi \mathrm{r}}\)
C. \(\frac{\mathrm{mg}}{\pi \mathrm{r}^{2}}\)
D. \(\frac{\mathrm{mg}}{2 \pi \mathrm{r}^{2}}\)
Answer:C
In equilibrium the tensile stress to which a wire of radius r is subjected by attaching a mass ‘m’ is ____.
A. \(\frac{\mathrm{mg}}{\pi \mathrm{r}}\) B. \(\frac{\mathrm{mg}}{2 \pi \mathrm{r}}\) C. \(\frac{\mathrm{mg}}{\pi \mathrm{r}^{2}}\) D. \(\frac{\mathrm{mg}}{2 \pi \mathrm{r}^{2}}\)