List of top Physics Questions asked in TS EAMCET

The length of a metal rod is 20 cm and its area of cross-section is \( 4 \, \text{cm}^2 \). If one end of the rod is kept at a temperature of \( 100^\circ\text{C} \) and the other end is kept in ice at \( 0^\circ\text{C} \), then the mass of the ice melted in 7 minutes is (Thermal conductivity of the metal = \( 90 \, \text{Wm}^{-1}\text{K}^{-1} \) and latent heat of fusion of ice = \( 336 \times 10^3 \, \text{Jkg}^{-1} \))

If the terminal velocity of a metal sphere of mass 8 g falling through a liquid is 3 \( \text{cms}^{-1} \), then the terminal velocity of another sphere of mass 64 g made of the same metal falling through same liquid is

If a brass sphere of radius 36 cm is submerged in a lake at a depth where the pressure is \( 10^7 \) Pa, then the change in the radius of the sphere is (Bulk modulus of brass = 60 GPa)

If a body is projected vertically from the surface of the earth with a speed of \( 8000 \, \text{ms}^{-1} \), then the maximum height reached by the body is (Radius of the earth = 6400 km and acceleration due to gravity = \( 10 \, \text{ms}^{-2} \))

The amplitude of a particle executing simple harmonic motion is 6 cm. The distance of the point from the mean position at which the ratio of the potential and kinetic energies of the particle becomes 4:5 is

A particle is acted upon by a force of constant magnitude such that its velocity and acceleration are always perpendicular to each other, then its

The initial and final velocities of a body projected vertically from the ground are \( 20 \, \text{ms}^{-1} \) and \( 18 \, \text{ms}^{-1} \) respectively. The maximum height reached by the body is (Acceleration due to gravity = \( 10 \, \text{ms}^{-2} \))

A man of mass 60 kg is standing in a lift moving up with a retardation of \( 2.8 \, \text{ms}^{-2} \). The apparent weight of the man is

A helicopter flying horizontally with a velocity of 288 kmph drops a bomb. If the line joining the point of dropping the bomb, and the point where bomb hits the ground makes an angle \( 45^\circ \) with the horizontal, then the height at which the bomb was dropped is (Acceleration due to gravity = \( 10 \, \text{ms}^{-2} \))

The driver of a bus moving with a velocity of 72 kmph observes a boy walking across the road at a distance of 50 m in front of the bus and decelerates the bus at 5 \( \text{ms}^{-2} \) by applying brakes and is just able to avoid an accident. The reaction time of the driver is

If A, B and C are three different physical quantities with different dimensional formulae, then the combination which can never give a proper physical quantity is

For any fixed distance, the electromagnetic force between two protons is \( 10^n \) times of the gravitational force between them. Then \( n = \)

The ratio of times taken by a freely falling body to travel first 5m, second 5m, third 5m distances is

When the temperature of a gas in a closed vessel is increased by $2.4^\circ\mathrm{C}$, its pressure increases by $0.5%$. The initial temperature of the gas is

Identify the incorrect statement from the following?

\(10^{10}\) electrons enter the emitter of a junction transistor in a time of \(0.4\ \mu\text{s}\). If \(5%\) of the electrons are lost in the base, then the collector current is

An electron in n-region of a p-n junction moves towards the junction with a speed of \(5 \times 10^5\ \text{ms}^{-1}\). If the barrier potential of the junction is \(0.45\ \text{V}\), then the speed with which the electron enters the p-region after penetration through the barrier is
(Charge of the electron \(= 1.6 \times 10^{-19}\ \text{C}\) and mass of the electron \(= 9 \times 10^{-31}\ \text{kg}\))

Two radioactive substances A and B have same number of initial nuclei. If the half-lives of A and B are 1.5 days and 4.5 days respectively, then the ratio of the number of nuclei remaining in A and B after 9 days is

In $\beta^-$ decay, a neutron transforms into a proton within the nucleus according to the equation:
neutron $\to$ proton + $\beta^-$ + $x$
In this equation the particle represented by 'x' is

The electron in hydrogen atom undergoes transition from higher orbits to an orbit of radius 476.1 pm. This transition corresponds to which of the following series?

Coaxial cable, a widely used wire medium offers an approximate frequency bandwidth of

If electromagnetic waves of power 600 W incident on a non-reflecting surface, then the total force acting on the surface is

A coil of resistance $8\,\Omega$, number of turns 250 and area $120 \text{ cm}^2$ is placed in a uniform magnetic field of 2 T such that the plane of the coil makes an angle of $\frac{\pi}{6}$ with the direction of the magnetic field. In a time of 100 ms, the coil is rotated until its plane becomes parallel to the direction of the magnetic field. The current induced in the coil is

A current of 4 A is passed through a square loop of side 5 cm made of a uniform manganin wire as shown in the figure. The magnetic field at the centre of the loop is