Physics Test - ...

The temperature of equal masses of three different liquids \(x, y\) and \(\mathrm{z}\) are \(10^{\circ} \mathrm{C}, 20^{\circ} \mathrm{C}\) and \(30^{\circ} \mathrm{C}\), respectively. The temperature of mixture when \(\mathrm{x}\) is mixed with \(\mathrm{y}\) is \(16^{\circ} \mathrm{C}\) and that when \(\mathrm{y}\) is mixed with \(\mathrm{z}\) is \(26^{\circ} \mathrm{C}\). The temperature of mixture when \(\mathrm{x}\) and \(\mathrm{z}\) are mixed will be:

The Electromagnetic Waves are:

An electric dipole is placed at an angle of \(60^{\circ}\) with an electric field of intensity \(10^{5} \mathrm{NC}^{-1}\). It experiences a torque equal to \(8 \sqrt{3} \mathrm{Nm}\). If the dipole length is \(2 \mathrm{~cm}\) then the charge on the dipole is c.

Electrical Inertia is the measure of:

Calculate the force between an alpha particle and a proton separated by \(5.12 \times 10^{-15} \) m.

The length of a simple pendulum is increased then the time period will:

A cricket bat is cut at the location of its centre of mass as shown. Then,

A person can see clearly only upto a distance of \(25 \mathrm{~cm}\). He wants to read a book placed at a distance of \(50 \mathrm{~cm}\) from his eyes. What is the power of the lens of his spectacles?

Unpolarised light is incident from air on a plane surface of a material of refractive index \('\mu'\). At a particular angle of incidence \('i'\), it is found that the reflected and refracted rays are perpendicular to each other. Which of the following options is correct for this situation?