Question - 2

For a simple pendulum, when a graph is plotted betwen displacement d, KE=\(1\over 2\)mv² and PE=mgh, taking d along X-axis and \(1\over 2\)mv² and mgh along Y-axis, the graph comes as

Question - 3

The length of the string of a simple pendulum is mmeasured with a meter scale to be 92.0cm, the radius of the bob plus the hook is measured with the help of vernier callipers to be 2.17cm.Mark out the correct statement(s).

Question - 4

Two wire A and B have same lengths and made of the same material but A is thicker than B.  Both are subjected to the same extending load.  Which will extend more?

Question - 5

When a glass capillary tube of radius 0.015 cm is dipped in water, the water rises to a height of  15 cm within it.  Assuming contact angle between water and glass to be \(0^o\) , the surface tension of water is

\([\rho _{water}= 1000\ kg^{-m^3, g = 9.81\ ms^{-2}}]\)

Question - 6

When 0.15 kg of ice at \(0^oC\) is mixed with 0.30 kg of water at \(50^oC\) in a container, the resulting temperature is \(6.7^oC.\) The heat of fusion of ice is

Question - 7

In the experiment of measuring speed of sound by resonance tube, it is observed that for tuning fork of frequency v = 480 Hz, length of air column in cm, \(l_1=30\ cm, l_2=70\ cm\)  then \(v_1\) is equal to

Question - 8

In an experiment of determining coefficient of viscosity, one lead shot A is having radius \(r_1\) and the other B is having \(r_1/2.\) Which one will fall fast?

Question - 9

The angle of minimum deviation for a glass prism with \(\mu=\sqrt3\) equals the refracting angle of the prism.  The angle of the prism is

Question - 10

With a concave mirror, an object is placed at a distance x, from the principal focus, on the principal axis.  The image is formed at a distance \(x_2.\)  From the principal focus, the focal length of the mirror is