Question
$Assertion :$ Hollow shaft is found to be stronger than a solid shaft made of same equal material.
$Reason :$ Torque required to produce a given twist in hollow cylinder is greater than that required to twist a solid cylinder of same length and material.

Answer

Torque required to produce a given twist in hollow cylinder is greater than solid cylinder thus both are correct.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

A parent nucleus $X$ is decaying into daughter nucleus $Y$ which in turn decays to $Z$. The half lives of $X$ and $Y$ are $40000 \,yr$ and $20 \,yr$, respectively. In a certain sample, it is found that the number of $Y$ nuclei hardly changes with time. If the number of $X$ nuclei in the sample is $4 \times 10^{20}$, the number of $Y$ nuclei present in it is
Broadcasting antennas are generally
A calcite crystal is placed over a dot on a piece of paper and rotated, on seeing through the calcite one will be see
In an experiment with sonometer a tuning fork of frequency $256 Hz$ resonates with a length of $25 cm$ and another tuning fork resonates with a length of $16 cm$. Tension of the string remaining constant the frequency of the second tuning fork is ....  $Hz$
A sample of hydrogen like atoms produces an emission spectrum consisting of $10$ wavelength arising out of all transitions possible. During this process the maximum angular impulse on an electron going from higher energy level to a lower energy level is
Two identical charges $+Q $ are kept fixed some distance apart. A small particle $P $ with charge $q$ is placed midway between them. If $P$  is given a small displacement $\Delta$ , it will undergo simple harmonic motion if
Digital movie projectors work on the principle of
Figure shows three different arrangements of materials $1, 2$ and $3$ to form a wall. Thermal conductivities are $k_1 > k_2 > k_3$ . The left side of the wall is $20\,^oC$ higher than the right side. Temperature difference $\Delta T$ across the material $1$ has following relation in three cases
A small asteroid is orbiting around the sun in a circular orbit of radius $r_0$ with speed $v_0$. A rocket is launched from the asteroid with speed $v=\alpha v_0$, where $v$ is the speed relative to the sun. The highest value of $\alpha$ for which the rocket will remain bound to the solar system is (ignoring gravity due to the asteroid and eff ects of other planets)
Aldehydes that do not undergo aldol condensation are

$1$. propanal

$2$. trichloroethanal

$3$. methanal

$4$. ethanal

$5$. benzaldehyde