COMEDK 2023 Evening Shift

A wheel is free to rotate about a horizontal axis through O. A force of \(200 \mathrm{~N}\) is applied at a point \(\mathrm{P} 2 \mathrm{~cm}\) from the center \(\mathrm{O}\). OP makes an angle of \(55^{\circ}\) with \(\mathrm{x}\) axis and...

The energy gap between valance band and the conduction band for a given material is \(6 \mathrm{~eV}\), then the material is :

The reverse current in the semiconductor diode changes from \(20 \mu \mathrm{A}\) to \(40 \mu \mathrm{A}\) when the reverse potential is changed from \(10 \mathrm{~V}\) to \(15 \mathrm{~V}\), then the reverse resistance of the junction diod...

In the given circuit the diode \(D_1\) and \(D_2\) have the forward resistance \(25 \Omega\) and infinite backward resistance. When they are connected to the source as shown, the current passing through the \(175 \Omega\) resistor is:

The time dependence of a physical quantity P is give by \(\mathrm{P=P}_0 \exp \left(-\alpha t^2\right)\) where \(\alpha\) is a constant and \(t\) is time. The constant \(\alpha\) will

A tentative explanation of observations without assuming that it is true is called

In the young's double slit experiment the fringe width of the interference pattern is found to be \(3.2 \times 10^{-4} \mathrm{~m}\), when the light of wave length \(6400^{\circ} \mathrm{A}\) is used. What will be change in fringe width if ...

A light having wavelength \(6400^{\circ} \mathrm{A}\) is incident normally on a slit of width \(2 \mathrm{~mm}\). Then the linear width of the central maximum on the screen kept \(2 \mathrm{~m}\) from the slit is :

Two open organ pipes A and B of length \(22 \mathrm{~cm}\) and \(22.5 \mathrm{~cm}\) respectively produce 2 beats per sec when sounded together. The frequency of the shorter pipe is

If reaction is \(\mathrm{R}\) and coefficient of friction is \(\mu\), what is work done against friction in moving a body by distance \(\mathrm{d}\) ?