List of top Physics Questions asked in TS EAMCET

If \(E\) is the kinetic energy of the alpha particle emitted in the decay of a radioactive nucleus of mass number \(A\), then the disintegration energy released in the process is (Parent nucleus is at rest):

In the given circuit, if the forward biased resistance of each diode is \(20\,\Omega\) and the reverse biased resistance of each diode is infinity, then the value of current \(I\) is:

In common emitter configuration of a transistor, if the change in collector current is \(99.5\%\) of the change in emitter current, then the common emitter current amplification factor is:

The combination of a receiver and a transmitter in electronic communication systems is:

The correct statement regarding neutrino is:

If the speed of the electron in an orbit of hydrogen atom is \(\frac{1}{548}\) times the speed of light in vacuum, then the angular momentum of the electron in this orbit is (h - Planck's constant):

A parallel plate capacitor of capacitance \(5\,\mu\text{F}\) is connected to an AC source. If the relation between the potential difference \(V\) (in volt) across the plates of the capacitor and time \(t\) (in second) is \[ V=7\cos(100\pi t), \] then the displacement current between the plates of the capacitor at a time of \(5\,\text{ms}\) is:

A magnet suspended in the horizontal plane makes 24 oscillations per minute at a place A where the dip angle is \(30^\circ\) and \(n\) oscillations per minute at another place B where the dip angle is \(60^\circ\). If the ratio of the horizontal components of earth's magnetic field at places A and B is \(16:9\), then the value of \(n\) is:

The relation between the total magnetic flux linked with a coil of resistance \(48\Omega\) and time is \(\phi=5-24t\). If there is no heat loss and the heat capacity of the coil is \(5\text{ JK}^{-1}\), then the rise in temperature of the coil during \(t=3\text{ s}\) to \(t=5\text{ s}\) is:

A cyclotron with dees of radius \(50\text{ cm}\) and magnetic field \(1.5\text{ T}\) is used to accelerate protons and alpha particles separately. The ratio of the maximum kinetic energies acquired by proton and alpha particle is:

If the angular momentum of an electron revolving in a circular orbit is \(2.1\times10^{-34}\text{ Js}\), then the magnetic moment associated with the electron is (Specific charge of electron \(=1.76\times10^{11}\text{ C kg}^{-1}\)):

The electric potentials at two points A and B are \(+60\text{ V}\) and \(-30\text{ V}\) respectively. If a particle of mass \(20\,\mu\text{g}\) and charge \(+10\,\mu\text{C}\) is released from rest at point A, then the velocity with which the particle reaches point B is:

In Young's double slit experiment, if the light of wavelength \(6000\AA\) is used, the fringe width is \(\beta\). If \(I\) is the intensity of light at a point on the screen where the path difference becomes \(2000\AA\), then the intensity of light at a point on the screen which is located at a distance of \(\frac{\beta}{6}\) from the central maximum is:

When a current of \(3\text{ A}\) flows through a uniform copper wire of radius \(0.6\text{ mm}\), the average drift speed of the electrons is \(V\). If \(1.5\text{ A}\) current is flowing in another uniform copper wire of radius \(1.2\text{ mm}\), then the average drift speed of the electrons is:

When two electric charges are placed at a distance apart in air, the electrostatic force between them is \(400\text{ N}\). If \(\frac13\) of the space between the two charges is filled with a medium of dielectric constant \(4\), then the electrostatic force between them is:

One end of a metal wire of length \(100\text{ cm}\) and radius \(0.6\text{ mm}\) is attached to an end of another wire made of the same metal of length \(180\text{ cm}\) and radius \(0.9\text{ mm}\). If the free end of the longer wire is kept at a potential of \(20\text{ V}\) and the free end of the shorter wire is kept at a potential of \(2\text{ V}\), then the potential at the junction of the two wires is:

Second harmonic of an open pipe and third harmonic of a closed pipe of length \(75\text{ cm}\) produce \(n\) beats per second. If the fundamental frequency of the open pipe is \(167\text{ Hz}\), then the value of \(n\) is (Speed of sound in air \(=340\text{ ms}^{-1}\)):

Two wires A and B made of the same material have equal lengths. If the volumes of wires A and B are in the ratio \(1:8\) and the tensions applied to the wires A and B are in the ratio \(1:2\), then the ratio of the speeds of transverse waves in wires A and B is:

If a convex lens of focal length \(22.5\text{ cm}\) is moved between an object and a screen placed \(120\text{ cm}\) apart, then the ratio of the minimum and maximum magnifications is:

In a Carnot engine, the heat released to the sink is \(22\%\) less than the heat taken from the source. If the temperature of the source is \(127^\circ\text{C}\), then the temperature of the sink is:

The number of gas molecules per unit volume in a vessel is \(2\times10^{25}\text{ m}^{-3}\) and the surface area of each gas molecule is \(12.5\sqrt{2}\times10^{-20}\text{ m}^2\). If all the gas molecules are in motion, then the mean free path of the gas molecules (in \AA) is:

In minimum deviation position of a prism made of refractive index \(\sqrt3\), the angle of deviation of the light ray is \(\frac{\pi}{6}\). If a light ray incidents normally on the first face of the prism, then the angle of incidence of the light ray on the second face of the prism is:

The time period of a body revolving around the earth in a circular orbit of radius \(2R\) is (where \(R\) is radius of the earth; \(g\) - acceleration due to gravity on the surface of the earth):

Two rods A and B are made of different materials having thermal conductivities in the ratio \(2:3\). The lengths of the rods A and B are in the ratio \(2:1\) and their volumes are in the ratio \(1:2\). In the steady state, if the temperature differences across the ends of rods A and B are respectively \(60^\circ\text{C}\) and \(\Delta\theta\), the ratio of rates of flow of heat through rods A and B is \(1:16\), then \(\Delta\theta=\)

A metal sphere of density \(9300\text{ kg m}^{-3}\) and radius \(1.5\text{ mm}\) is falling with a terminal velocity \(V\) through a vertical column of liquid of density \(1300\text{ kg m}^{-3}\) and coefficient of viscosity \(\eta\). The terminal velocity of another sphere of the same metal but of radius \(3\text{ mm}\) falling through another liquid of density \(800\text{ kg m}^{-3}\) and coefficient of viscosity \(1.7\eta\) is: