List of top Questions asked in TS EAMCET- 2026

If A, B and C represent the power gain, base resistance and collector resistance respectively of a transistor connected in common emitter configuration, then the common emitter current amplification factor is:

In hydrogen atom, electron is present in $n_x$ state. The energy of Lyman spectral line of hydrogen spectrum originated from $n_x$ state is $1.635 \times 10^{-18}\text{ J}$. What is the approximate energy (in J) required to excite this electron from $n_x$ state to $(n_x+1)$ state?}

In H atom, electron is present in $n_x$ state. The angular momentum of this electron is $1.051 \times 10^{-34}\text{ Js}$. What is the energy (in J) required to excite this electron from $n_x$ state to $(n_x+1)$ state? ($h = 6.6 \times 10^{-34}\text{ Js}$; $\pi = 3.14$)}

If the nuclear force between a proton and a neutron is attractive, then the distance between them can be:

If the radius of $_{13}\text{Al}^{27}$ nucleus is $3.6\text{ fm}$, then the number of neutrons in a nucleus of atomic number $29$ and radius $4.8\text{ fm}$ is:}

If an electron moving with a velocity of $4 \times 10^6\text{ ms}^{-1}$ enters a uniform magnetic field of $\frac{\pi}{2}\text{ mT}$ at an angle of $60^\circ$ with the direction of the magnetic field, then the pitch of the helical path of the electron is: (Mass of the electron $= 9 \times 10^{-31}\text{ kg}$)}

A thin conducting wire of length $L$ carrying a current of $2\text{ A}$ is bent into a square loop of $2$ turns and another thin conducting wire of length $2L$ carrying a current of $3\text{ A}$ is bent into a circular loop of $3$ turns. If the magnetic moment of the circular loop is $\frac{4}{\pi}\text{ A}\cdot\text{m}^2$, then the magnetic moment of the square loop is:}

If the wavelength of a spectral line in the Balmer series of hydrogen spectrum is $\frac{7.2}{R}$, then the ratio of the radii of the higher and lower orbits between which the transition of electron takes place is ($R$ - Rydberg constant):}

When photons of wavelength $4000\text{ \AA}$ are incident on a photosensitive material of cut-off wavelength $4800\text{ \AA}$, the stopping potential is $V$. If the same photons are incident on another photosensitive material of cut-off wavelength $6000\text{ \AA}$, then the stopping potential is:}

An electron is moving in a stable circular orbit of radius $0.1\text{ m}$ around a thin infinitely long positively charged straight wire. If the orbital velocity of the electron around the wire is $4 \times 10^7\text{ ms}^{-1}$, then the linear charge density of the wire is nearly:}

Two charges $+6\,\mu\text{C}$ and $-3\,\mu\text{C}$ are placed at points $(-2.7\text{ cm},0)$ and $(2.7\text{ cm},0)$ respectively in an external electric field of $1.8\times10^5r^{-2}\,\text{NC}^{-1}$, where $r$ is the distance of a charge from the origin. Then the net electrostatic energy of the system of the two charges is:}

When a cell is connected to either $2\,\Omega$ or $4.5\,\Omega$ resistors, if the power consumption is same in both the cases, then the internal resistance of the cell is:

The effective resistance between the points A and B of the circuit shown in the figure is:

In an astronomical telescope of $135\text{ cm}$ length kept in normal adjustment, if the difference between the focal lengths of the objective and eyepiece is $125\text{ cm}$, then the magnification of the telescope is:}

If a parallel beam of light of wavelength $500\text{ nm}$ is incident on a convex lens of focal length $20\text{ cm}$ having a circular aperture of diameter $5\text{ cm}$, then the radius of the central bright diffraction spot formed on the focal plane of the lens is nearly (in $\mu\text{m}$):}

The length of an open pipe is half of the length of another closed pipe. When the two pipes are vibrated, four nodes are formed in both the cases. The ratio of the frequencies of the open and the closed pipes is:

When a thin convex lens is immersed in a liquid of refractive index $1.2$, the focal length of the lens becomes $48\text{ cm}$. If the ratio of the radii of curvature of the lens is $2:3$ and the refractive index of the material of the lens is $1.5$, then the radii of curvature of the lens are:}

A Carnot engine operates between \(33^\circ C\) and \(133^\circ C\). During adiabatic expansion, relation is \(T\sqrt{V}=constant\). The work done by \(10\) moles during adiabatic expansion is

\(5\) moles of monoatomic gas and one mole of rigid diatomic gas are mixed. The internal energy at temperature \(127^\circ C\) is (Given \(R=8.31Jmol^{-1}K^{-1}\))

A source of sound of frequency $660\text{ Hz}$ and an observer are moving towards each other with speeds of $31\text{ kmph}$ and $23\text{ kmph}$ respectively. If the wind blows with a speed of $5\text{ kmph}$ from observer towards the source, then the frequency of the sound heard by the observer is: (Speed of sound in air $=340\text{ ms}^{-1}$)}

The energy required to transfer a satellite of mass \(m\) from an orbit of height \(0.5R\) from the surface of the earth to an orbit of height \(2R\) from the surface of the earth is (where \(g\) is acceleration due to gravity and \(R\) is radius of earth)

A wire of length \(100\text{ cm}\) is made of a material of Young’s modulus \(1.6\times10^{11}\text{ Nm}^{-2}\). If work done in stretching this wire by \(0.1\text{ cm}\) is \(2\text{ J}\), then the area of cross-section of the wire (in \(10^{-5}\text{ m}^2\)) is

If a capillary tube of inner radius \(0.5mm\) is immersed vertically in water, then mass of water risen in capillary tube is (Surface tension \(=0.07Nm^{-1}\), \(g=10ms^{-2}\))

Water flows through a horizontal pipe AB of non-uniform cross section. Water enters at A of area \(4cm^2\) with pressure \(10^5Nm^{-2}\) and velocity \(20ms^{-1}\). It leaves at B of area \(8cm^2\). The pressure at B is

Water of mass \(3\text{ kg}\) in a kettle of mass \(1\text{ kg}\) at an initial temperature of \(30^\circ C\) is heated by a heater of power \(2\text{ kW}\). When the lid is open, heat is lost at a constant rate of \(250\text{ Js}^{-1}\). If specific heat capacity of kettle material is half that of water, then time required to raise temperature to \(80^\circ C\) is