KCET 2023

Seven identical discs are arranged in a planar pattern, so as to touch each other as shown in the figure. Each disc has mass \(m\) radius \(R\). What is the moment of inertia of system of six discs about an axis passing through the centre o...

When a \(p\)-\(n\) junction diode is in forward bias, which type of charge carriers flows in the connecting wire?

A full-wave rectifier with diodes \(D_1\) and \(D_2\) is used to rectify \(50 \mathrm{~Hz}\) alternating voltage. The diode \(D_1\) conducts ......... times in one second.

A truth table for the given circuit is

A block of mass \(m\) is connected to a light spring of force constant \(k\). The system is placed inside a damping medium of damping constant \(b\). The instantaneous values of displacement, acceleration and energy of the block are $$x, a$...

The true length of a wire is \(3.678 \mathrm{~cm}\). When the length of this wire is measured using instrument \(A\), the length of the wire is \(3.5 \mathrm{~cm}\). When the length of the wire is measured using instrument \(B\), it is foun...

When light propagates through a given homogeneous medium, the velocities of

An unpolarised light of intensity \(I\) is passed through two polaroids kept one after the other with their planes parallel to each other. The intensity of light emerging from second polaroid is \(\frac{I}{4}\). The angle between the pass a...

In the Young's double slit experiment, the intensity of light passing through each of the two double slits is \(2 \times 10^{-2} \mathrm{~Wm}^{-2}\). The screen-slit distance is very large in comparison with slit-slit distance. The fringe w...

A ball of mass \(0.2 \mathrm{~kg}\) is thrown vertically down from a height of \(10 \mathrm{~m}\). It collides with the floor and loses \(50 \%\) of its energy and then rises back to the same height. The value of its initial velocity is