Download App

STD 11- 8. mechanical properties of solids — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 11- 8. mechanical properties of solids4 Marks
MCQ
Four identical rods are stretched by same force. Maximum extension is produced in
  • A
    $L = 10cm,\,\,D = 1\,mm$
  • ✓
    $L = 100\,cm,\,D = \,2mm$
  • C
    $L = 200\,cm,\,D = \,3mm$
  • D
    $L = 300\,cm,\,D = \,4\,mm$
✓

Answer

Correct option: B.
$L = 100\,cm,\,D = \,2mm$
b
(b) $l = \frac{{FL}}{{\pi {r^2}Y}}$      $l \propto \frac{L}{{{r^2}}}$ 

Ratio of $\frac{L}{{{r^2}}}$ is maximum for wire in option $(b).$

 

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

NEET STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

Assertion : Electric potential and electric potential energy are different quantities.

Reason : For a system of positive test charge and point charge electric potential energy $=$ electric potential.

→
Which of the following products is formed when benzaldehyde is treated with $CH_3MgBr$ and the addition product so obtained is subjected to acid hydrolysis ?
→
A body, thrown upwards with some velocity, reaches the maximum height of $20\,m$. Another body with double the mass thrown up, with double initial velocity will reach a maximum height of..........$m$
→
The work done per unit volume to stretch the length of area of cross-section $2 \,mm ^2$ by $2 \%$ will be ....... $MJ / m ^3$ $\left[Y=8 \times 10^{10} \,N / m ^2\right]$
→
In an series $A.C.$ circuit the current and voltage are given respectively as

$I = 10\,\sin \,\omega t$   ;   $V = 10\,\sin \,\left( {\omega t + \pi /4} \right)$

then which of the following element may be present in the circuit 
$(a)$ Only $C$            $(b)$ All $L, C$ and $R$     $(c)$ Both $C$ and $R$     $(d)$ Both $L$ and $R$

→
We have two spheres, one of which is hollow and the other solid. They have identical masses and moment of inertia about their respective diameters. The ratio of their radius is given by
→
Three particles of equal mass $m$ are situated at the vertices of an equilateral triangle of side $l$. They are moving in a circle in influence of their mutual gravitational interaction. Then their time period of revolution is directly proportional to
→
In Young's double slit experiment, the distance between the slits is $1 \,mm$ and that between slit and screen is $1 $ meter and $10th $ fringe is $5 \,mm$ away from the central bright fringe, then wavelength of light used will be.....$\mathop A\limits^o $
→
An ideal transformer has $500$ and $5000$ turn in primary and secondary windings respectively. If the primary voltage is connected to a $6\,V$ battery then the secondary voltage is.......$V$
→
A bullet of mass $25\,g$ moving with a velocity of $200\,m/s$ is stopped within $5\,cm$ of the target. The average resistance offered by the target is ............... $\mathrm{kN}$
→