Download App

Some Mechanical Properties of Matter — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysicsSome Mechanical Properties of Matter1 Mark
Question
A heave uniform rod Is hanging vertically form a foxed support. It is stretched by its won weight. The diameter of the rod is.
  1. Smallest at the top and gradually increases down the rod.
  2. Largest at the top and gradually decreased down the rod.
  3. Uniform everywhere.
  4. Maximum in the middle.
✓

Answer

  1. Smallest at the top and gradually increases down the rod.

Explanation:

As the rod is of uniform mass distribution and stretched by its own weight, the topmost part of the rod experiences maximum stress due to the weight of the entire rod. This stress leads to lateral strain and the rod becomes thinner. Moving down along the length of the rod, the stress decreases because the lower parts bear lesser weight of the rod. With reduced stress, the lateral strain also reduces. Hence, the diameter of the rod gradually increases from top to bottom.

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

Explore more

More "M.C.Q (1 Marks)" from Some Mechanical Properties of Matter→Some Mechanical Properties of Matter — all question types→Physics STD 11 Science question papers→Rajasthan Board STD 11 Science question papers→Rajasthan Board question paper generator→

Similar questions

A large tank filled with water to a height ‘h’ is to be emptied through a small hole at the bottom. The ratio of time taken for the level of water to fall from $ h$  to $\frac{h}{2}$ and from $\frac{h}{2}$ to zero is
→
A boy is standing on top of a tower of height $85 \,m$ and throws a ball in the vertically upward direction with a certain speed. If $5.25$ s later he hears the ball hitting the ground, then the speed with which the boy threw the ball is .......... $m / s$ (take, $g=10 \,m / s ^2$ and speed of sound in air $=340 \,m / s$ )
→
Even if a physical quantity depends upon three quantities, out of which two are dimensionally same, then the formula cannot be derived by the method of dimensions. This statement
→
A rigid lamina is rotating about an axis passing perpendicular to its plane through point $O$ as shown in figure. The angular velocity of point $B$ w.r.t $A$ is ....... $rad/s$.
→
A particle starts from rest at a distance $R$ from the centre and along the axis of a fixed ring of radius $R \&$ mass $M.$ Its velocity at the centre of the ring is :
→
A tyre filled with air $({27^o}C,$ and $2$ atm) bursts, then what is temperature of air ....... $^oC$ $(\gamma = 1.5)$
→
Ultrasonic signal sent from $SONAR$ returns to it after reflection from a rock after a lapse of $1 \,sec.$ If the velocity of ultrasound in water is $1600 ms^{-1}$, the depth of the rock in water is ..... $m$
→
A person says that he measured the acceleration of a particle to be non-zero while no force was acting on the particle:
  1. He is a liar.
  2. His clock might have run slow.
  3. His meter scale might have been longer than the standard.
  4. He might have used non-inertial frame.
→
A stone weighing $1$ kg and sliding on ice with a velocity of $2$ m/s is stopped by friction in $10$ sec. The force of friction (assuming it to be constant) will be ......... $N$
→
→