List of top Physics Questions asked in KEAM

The line that joins any planet to the sun sweeps out equal areas in equal intervals of time. This statement is

The CORRECT statement for a rigid body rotating about a fixed axis with angular velocity \(\omega\) is

If the moment of inertia of a circular disc about its central axis is I, then that for the same disc about its diameter is

If the forces acting on two bodies of masses \(2kg\) and \(3kg\) are same, then the ratio of their respective accelerations is

If a moving body changes its position from \(x_1\) to \(x_2\) in a time interval \(\Delta t\), then \(\frac{x_2 - x_1}{\Delta t}\) is defined as

A lift with a load of \(1000kg\) is moving up against the frictional force \(2000N\). If the power delivered to it by the operating motor is 36000 W, then the speed of the lift is \((g = 10 m s^{-2})\)

A car at rest is accelerated at \(2 ms^{-2}\) for 1 minute and then retarded at \(2 ms^{-2}\) for 1 minute to attain rest. The distance travelled by the car is

The area under the curve drawn between the force \(F\) and time \(t\) is

A rain drop of mass \(10g\) falls from a height of \(50m\) from rest. If the loss of energy due to air resistance is \(3J\), then the velocity of the drop on striking the ground is \((g = 10ms^{-2})\)

The value of one barn in SI unit is

What is the value of the sum of 12.1100 + 18.0 + 1.012 as per the rule of significant figures

The band gap energy of silicon is

A convex lens having power \(P\) is cut into two halves perpendicular to the principal axis. Then the power of each piece is

In a plane electromagnetic wave, the magnetic field is given by \(B = 400 \times 10^{-6}\sin[(4.0 \times 10^{-4})(t - x/c)]\). The peak value of electric field (in V m\(^{-1}\)) is

In Young’s double slit experiment performed in air medium, the fringe width observed is 1.4 mm. If the entire arrangement is kept in a liquid medium of refractive index 1.4, then the fringe width (in mm) will be

Pick out the INCORRECT statement

When a proton moves in a uniform magnetic field such that its velocity has a component along the direction of magnetic field, its trajectory will be a

An iron ring is held horizontally and a bar magnet is dropped gently through the ring with its length coinciding with the axis of the ring. The acceleration of the freely falling magnet (\(g\) = acceleration due to gravity) is

A wire of length 1.2 m carrying a current of 4 A, when placed in a uniform magnetic field 5 T experiences a force of 12 N. Then the angle between the direction of current and magnetic field is

An electric cell does 10 J of work in carrying a charge of 5 C around a simple closed circuit. The electromotive force of the cell is

Three capacitors each of capacitance \(12\,\mu F\), are connected in series. When this combination is connected to a battery of \(12\,V\), the charge drawn from the battery is

A point charge \(-q\) is placed at a distance \(x\) from an isolated conducting plane. The electric field at any point \(P\) on the other side of the plane is directed

A particle executes linear simple harmonic motion and its potential energy (P.E.), kinetic energy (K.E.), total energy (T.E.) are measured as functions of displacement \(x\) from the mean position at the origin. Then

If the value of \(C_p/C_v\) is unity in the equation \(PV^\gamma = \text{constant}\), then the process is

A closed organ pipe and an open organ pipe have the same length. The ratio of the frequencies in their third mode of vibrations is