List of top Questions asked in AP EAPCET

At T(K), a gaseous mixture contains H$_2$ and O$_2$. The total pressure of the mixture is 2 bar. The partial pressure of H$_2$ is 1.778 bar. What is the weight (w/w) percentage of H$_2$ in the mixture?

How many of the following molecules / ions have a trigonal planar structure?
$ \text{BO}_3^{3-}, \, \text{NH}_3, \, \text{PCl}_3, \, \text{BCl}_3, \, \text{ClF}_3, \, \text{XeO}_3 $

The correct order of atomic radii of C, Al and S is

Which of the following sets of quantum numbers is not possible for the electron?

If in an amplitude modulated wave, the maximum amplitude is 14 V and the modulation index is 0.4, then the amplitude of the carrier wave is

A cc camera is fabricated using a semiconducting material having a band gap of 3 eV. The wavelength of light it can detect is nearly

A transistor has 3 impurity regions of different doping levels. In the order of increasing doping level, the regions are

If the time taken for a radioactive substance to decay 8% to 77% is 12 minutes, then the half life of the substance in minutes is

The difference between the frequencies of second and first Paschen lines of hydrogen atom is
($ R $ - Rydberg constant and $ c $ - speed of light in vacuum)

An alpha particle moves along a circular path of radius 0.5 mm in a magnetic field of $ 2 \times 10^{-2} \, \text{T} $. The de Broglie wavelength associated with the alpha particle is nearly
(Planck’s constant $ h = 6.63 \times 10^{-34} \, \text{Js} $)

The magnitude of the electric field of a plane electromagnetic wave travelling in free space is $ E $. If $ \mu_0 $ and $ \varepsilon_0 $ are respectively permeability and permittivity of the free space, then the magnitude of magnetic field of the wave is

For better tuning of a series LCR circuit in a communication system, the preferred combination is

A coil of 45 turns and radius 4 cm is placed in a uniform magnetic field such that its plane is perpendicular to the direction of the field. If the magnetic field increases from 0 to 0.70 T at a constant rate in a time interval of 220 s, then the induced emf in the coil is

A short bar magnet has a magnetic moment of $0.48 \, J {T}^{-1}$. The magnitude of magnetic field at a point at 10 cm distance from the centre of the magnet on its axis is

A wire of length 10 m carrying current of 1 A is bent into a circular loop. If a magnetic field of $2\pi \times 10^{-4} \, \text{T}$ is applied on the loop, then the maximum torque acting on it is:

The force per unit length on a straight wire carrying current of 8 A making an angle of $30^\circ$ with a uniform magnetic field of 0.15 T is

In a metal, the charge carrier density is $ 9.1 \times 10^{28} \, \text{m}^{-3} $ and its electrical conductivity is $ 6.4 \times 10^7 \, \text{S m}^{-1} $. When an electric field of $ 10 \, \text{N C}^{-1} $ is applied to the metal, then the average time between two successive collisions of electrons in the metal is:
(Mass of electron $ = 9.1 \times 10^{-31} \, \text{kg} $; charge of electron $ = 1.6 \times 10^{-19} \, \text{C} $)

Charge 'Q' (in coulomb) flowing through a conductor in terms of time 't' (in seconds) is given by the equation $ Q = 3t^2 + t $. The current in the conductor at time $ t = 3 \, \text{s} $ is:

The velocity acquired by an electron at rest when subjected to a uniform electric field of potential difference $180~\text{V}$ is:
(Mass of electron $= 9 \times 10^{-31}$ kg and charge of electron $= 1.6 \times 10^{-19}$ C)

The energy stored in a capacitor is $W$. To double the charge on the plates of the capacitor, the additional work to be done is

The wavenumber of the first line ($n_2 = 3$) in the Balmer series of hydrogen is $ \overline{\nu}_1 \, \text{cm}^{-1} $. What is the wavenumber (in cm$^{-1}$) of the second line ($n_2 = 4$) in the Balmer series of He$^{+}$?

In a region, the electric field is given by $\vec{E} = (3\hat{i} + 5\hat{j} + 7\hat{k})\ \text{N/C}$. The electric flux through a surface of area $3\ \text{m}^2$ in the $yz$-plane is (in SI units):

A light ray incidents on an equilateral prism made of material of refractive index $\sqrt{3}$. Inside the prism, if the light ray moves parallel to the base of the prism, then the angle of incidence of the light ray is:

A steel wire of length 81 cm has a mass of $5 \times 10^{-3}$ kg. If the wire is under a tension of 50 N, then the speed of transverse waves on the wire is:

If the ratio of specific heats of a gas at constant pressure and at constant volume is $\gamma$, then the number of degrees of freedom of the rigid molecules of the gas is