Question 1 : The property of a material due to which shape is changed permanently is known as:<br/>

Question 3 : The length of an iron wire is $L$ and area of cross-section is $A$. The increase in length is $l$ on applying the force $F$ on its two ends. Which of the statement is correct?

Question 4 : A&#160;horizontal aluminium rod of diameter 4.8 cm projects 5.3 cm from a wall. A 1200 kg object is suspended from the&#160;end of the rod. The shear modulus of aluminium is $3.0 \, \times \, 10^{10} \, N/m^2.$ Neglecting the mass of&#160;the rod, find&#160;the&#160;vertical deflection of the end of the rod.&#160;

Question 5 : Under which of the following conditions is the law $pV=RT$ obeyed most closely by a real gas?

Question 6 : In Rutherford's experiment, most of the alpha particles are observed to

Question 7 : The compressibility factor Z for the gas at $327^oC$ and 60.375 atm pressure is :

Question 8 : For an adiabatic process the relation between V&#160;and T is given by&#160;<br/>

Question 9 : Assertion: The isothermal curves intersect each other at a certain point. Reason: The isothermal changes takes place rapidly, so the thermal curves have very little slope.

Question 11 : A litre of dry air at STP expands adiabatically to a volume of $3$ litres. If $\gamma=1.40$, the work done by air is: $(3^{1.4}=4.6555)$ [Take air to be an ideal gas]

Question 12 : The earth receives at its surface radiation from the sun at the rate of $1400 w/m^{2}$. The distance of the centre of the sun from the surface of the earth is $1.5 \times 10^{11}m$ and the radius of the sun is $7 \times 10^{8}m$. Treating sun as a black body, it follows from the above data that its surface temperature is

Question 13 : Two particle execute S H M of same amplitude and frequency along the same straight line, They pass one another going in opposite direction each time their displacement is half of their amplitude. The phase difference between them is

Question 14 : The motion described by the needle of sewing machine is oscillatory motion. True or false

Question 15 : Which of the following is not a necessary apparatus for the measurement of acceleration due to gravity $(g)$ by a simple pendulum?

Question 16 : The amplitude of a particle executing SHM about O is 10 cm. Then:

Question 17 : The ratio of amplitudes of two simple harmonic motions represented by the equations $y_1=5 \sin \begin{pmatrix}2\pi t + \dfrac{\pi}{4}\end{pmatrix}$ and $y_2=2\sqrt{2} (\sin 2\pi t + \cos 1\pi t)$ is

Question 19 : Assertion: The shape of a liquid drop is spherical. Reason: The pressure inside the drop is greater than that of outside.

Question 20 : A person in a lift is holding a water jar, which has a small hole at the lower end of its side. When the lift is at rest, the water jet coming out of the hole hits the floor of the lift at a distance $d$ of $1.2 m$ from the person. In the following, state of the lift's motion is given in List I and the distance where the water jet hits the floor of the lift is given in List II. Match the statements from List I with those in List II and select the correct answer using the code given below the lists.<br/><table class="wysiwyg-table"><tbody><tr><td></td><td>List I</td><td></td><td>List II</td></tr><tr><td>P.</td><td>Lift is accelerating vertically up.</td><td>1.</td><td>$d= 1.2 m$</td></tr><tr><td>Q.</td><td>Lift is accelerating vertically down with an acceleration less than the gravitational acceleration.</td><td>2.</td><td>$d &gt; 1.2 m$</td></tr><tr><td>R.</td><td>Lift is moving vertically up with constant speed.</td><td>3.</td><td>$d &lt; 1.2 m$</td></tr><tr><td>S.</td><td>Lift is falling freely.</td><td>4.</td><td>No water leaks out of the jar</td></tr></tbody></table>