COMEDK 2024 Afternoon Shift

A circular disc of mass \(20 \mathrm{~kg}\), having radius \(10 \mathrm{~cm}\) is suspended by a wire attached to its centre. The wire is twisted by rotating the disc and released. The time period of torsional oscillations is found to be $$...

If units of mass, length and gravitational constant are chosen to fundamental units, the dimensions of time would be

If \(\alpha, \beta\) and \(\gamma\) are the angles between the vectors \(\overrightarrow{\mathrm{P}}, \overrightarrow{\mathrm{Q}}\), and \(\overrightarrow{\mathrm{R}}\) and \(\alpha=90^{\circ}\) as shown in figure. the product of $$(\vec{Q}...

In Young's double slit experiment the ratio of phase difference between light waves reaching the third bright fringe and third dark fringe is

A slit of width \(10 \times 10^{-7} \mathrm{~m}\) is illuminated by light of wavelength \(500 \mathrm{~nm}\). Angular position of the first minimum is

In Young's double slit experiment, the intensity of light at a point on the screen where the path difference is \(\lambda\) is \(\mathrm{K}\) units (\(\lambda\) is the wavelength of light used). The percentage change in intensity at a point...

In Young's double slit experiment, the ratio of intensities of light from one slit to the other is \(9: 1\). If Im is the maximum intensity, what is the resultant intensity when they interfere at phase difference \(\phi\) ?

A tuning fork of unknown frequency produces 4 beats with tuning fork of frequency \(310 \mathrm{~Hz}\). It gives the same number of beats on filing. The initial frequency of a tuning fork is

An object of mass \(3 \mathrm{~kg}\) moves due to an applied constant force such that its position along \(\mathrm{X}\) axis is given by \(x=\frac{t^3}{3}\) where \(x\) is in meters and $t$ in seconds. The work done in 1 second is

An electric motor raises a mass of \(1.5 \mathrm{~kg}\), a distance of \(1.128 \mathrm{~m}\) in time of \(4.79 \mathrm{~s}\). Calculate the power to an appropriate significant figures.
(take \(g=9.81 \mathrm{~ms}^{-2}\))