List of top Physics Questions asked in KCET

A ball hits the floor and rebounds after an inelastic collision. In this case

In figure E and V_cm represent the total energy and speed of centre of mass of an object of mass 1kg in pure rolling. The object is :

A 1 kg ball moving at 12 ms^-1 collides with a 2 kg ball moving in opposite direction at 24 ms^-1. If the coefficient of restitution is \(\frac{2}{3}\), then the velocities after the collision are

A coin placed on a rotating turn table just slips if it is placed at a distance of 4 cm from the centre. If the angular velocity of the turn table is doubled it will just slip at a distance of :

A particle starts from the origin at t = 0s with a velocity of \(10\hat{j}\) ms^-1 and move in the x-y plane with a constant acceleration of \((8\hat{i}+2\hat{j})\) ms^-2 . At an instant when the x-coordinate of the particle is 16 m, y-coordinate of the particle is:

A particle starts from rest. Its acceleration ‘a’ versus time ‘t’ is shown in the figure. The maximum speed of the particle will be:

For a body moving along a straight line, the following v-t graph is obtained.

According to the graph, the displacement during

A point charge 'q' is placed at the corner of a cube of side 'a' as shown in the figure. What is the electric flux through the face ABCD?

A hot filament liberates an electron with zero initial velocity. The anode potential is $1200\,V$. The speed of the electron when it strikes the anode is

A light beam of intensity $20\, W/cm^2$ is incident normally on a perfectly reflecting surface of sides $25 \,cm \times 15 \,cm$. The momentum imparted to the surface by the light per second is

A long cylindrical wire of radius R carries a uniform current I flowing through it. The variation of magnetic field with distance ‘r’ from the axis of the wire is shown by

A thin uniform rectangular plate of mass 2 kg is placed in X-Y plane as shown in figure. The moment of inertial about x-axis is Ix = 0.2 kg m² and the moment of inertia about y-axis is Iy = 0.3 kg m². The radius of gyration of the plate about the axis passing through O and perpendicular to the plane of the plate is

A body is initially at rest. It undergoes one-dimensional motion with constant acceleration. The power delivered to it at time ‘t’ is proportional to

One end of a string of length ‘ l ’ is connected to a particle of mass ‘m’ and the other to a small peg on a smooth horizontal table. If the particle moves in a circle with speed ‘v’, the net force on the particle (directed towards the centre) is : (T is the tension in the string)

Rain is falling vertically with a speed of 12 ms^-1. A woman rides a bicycles with a speed of 12 ms^-1 in east to west direction. What is the direction in which she should hold her umbrella ?

At a metro station, a girl walks up a stationary escalator in 20 sec. If she remains stationary on the escalator, then the escalator take her up in 30 sec. The time taken by her to walk up on the moving escalator will be

A cylindrical wire has a mass(0.3 ± 0.003)g, radius (0.5 ± 0.005)mm and length (6 ± 0.06)cm. The maximum percentage error in the measurement of its density is

Two long straight parallel wires are a distance 2 d part. They carry steady equal currents flowing out of the plane of the paper. The variation of magnetic field B along the line xx’ is given by

A positive hole in a semiconductor is

In the following circuit what are P and Q :

A 220 V A.C supply is connected between points A and B as shown in figure what will be the potential difference V across the capacitor?

Angular momentum of an electron in hydrogen atom is \(\frac{3h}{2\pi}\) (h is the Planck’s constant). The K.E. of the electron is

A radio-active elements has half-life of 15 years. What is the fraction that will decay in 30 years?

During a β^- decay

Two protons are kept at a separation of 10 nm. Let F_n and F_e the nuclear force and the electromagnetic force between them