List of top Questions asked in AP EAPCET- 2022

A power transmission line feeds input voltage 2500 V to a step down transformer with its primary winding having 3000 turns. The number of turns in the secondary in order to get output voltage of 220 V is:
A pulse of radiation is absorbed by an object initially at rest for \(10^{-4}\, s\). If the power of the pulse is \(9 \times 10^{-3}\, W\), then the total momentum of the object received is. (Speed of light in vacuum \(c = 3 \times 10^8\, m\,s^{-1}\))
A circular coil of radius 10 cm and 50 turns is rotated about its vertical diameter with an angular speed of 20 rad s\(^{-1}\) in a uniform horizontal magnetic field of magnitude \(7 \times 10^{-2}\, T\). If the closed loop resistance of the coil is 20 \(\Omega\), the maximum value of current in the coil is:
An electromagnetic wave has electric and magnetic fields given by \(\vec{E}(t) = \vec{E}_m \sin(kx - \omega t)\), \(\vec{B}(t) = \vec{B}_m \sin(kx - \omega t)\). If the direction of \(\vec{E}_m\) and \(\vec{B}_m\) are \((i + 2j)\) and \((-i + \frac{1}{2} j)\) respectively, then the direction of propagation of the wave is:
The photoemission of electrons occurs when a light of frequency \(5 \times 10^{14}\, Hz\) is incident on a metal surface with work function of \(2.0\, eV\). The maximum speed of emitted photoelectrons is approximately (Planck’s constant \(h = 6.6 \times 10^{-34}\, J\,s\), mass of electron \(m = 9 \times 10^{-31}\, kg\))
A wire of resistance \(50 \, \Omega\) is elongated to get a resistance of \(60.5 \, \Omega\). The unelongated length of the wire is \(100 \, cm\). The wire is elongated by:
The equivalent capacitance of the system shown in the figure between the points A and B is:
Two conductors A and B are made of the same material and have the same length. Conductor A is a solid wire of diameter \(d_1\), and conductor B is a hollow tube of outer diameter 2.0 mm and inner diameter 1.0 mm. The resistances of the conductors A and B are \(R_1\) and \(R_2\) respectively. If \(\frac{R_1}{R_2} = 3\), then \(d_1\) is:
An electric field of \(1000 \, V/m\) and a perpendicular magnetic field act on a moving electron to produce no net force. If the speed of the electron is \(2.5 \, km/s\), then the magnitude of the magnetic field is:
A wire of length 20 cm is moving with a velocity of 180 m/min perpendicular to a magnetic field. If the induced emf in the wire is 3 V, the magnitude of the field in tesla is:
In a Young’s double slit experiment, a set of parallel slits with a separation of 0.1 mm is illuminated by light having a wavelength of 620 nm. The interference pattern is observed on a screen 4 m from the slits. The difference in the path lengths of the light waves from each of the slits to the location of a 4th (fourth) order bright fringe on the screen is:
As shown in the figure, two tiny conducting balls of identical mass and identical charge are suspended by two non-conducting threads of equal length \(L\). The separation between the balls in equilibrium is \(x\) and is related to \(L\) as \(x \propto L^{\beta}\). If \(\theta\) is assumed to be very small then the value of \(\beta\) is:
A particle of charge \(7 \, \mu C\) is moved away from an infinite non-conducting sheet of surface charge density \(5.0 \, \mu C\, m^{-2}\) to a point at a distance of \(5.0 \, cm\). The work done by the field due to the sheet is \(\left(\frac{1}{4\pi\varepsilon_0} = 9 \times 10^9 \, SI \, units\right)\)
Gas heated so rms speed doubles. Heat added = ?
The phase difference between two particles of a medium lying between two consecutive nodes is:
A layer of oil floats on water. A ray of light strikes the oil-water interface at an angle of incidence \(30^\circ\). The refractive indices of oil and water are 1.5 and 1.3 respectively. The angle made by the ray in water is:
A steel rod of length \(5\,\text{m}\) and radius \(2\,\text{cm}\) is heated by \(10^\circ\text{C}\). Find the % change in volume \(\left(\alpha = 10 \times 10^{-6}\,^\circ\text{C}^{-1}\right)\):
Steam engine efficiency 30% wastes heat 2.1×10$^9$ J/min. Work done is:
At 30°C, 2 moles gas expands adiabatically from V to 4V. Final temperature is:
A metal cube has an edge length of 90 cm. If $2 \times 10^9$ N m$^{-2}$ of pressure (or stress) is required to reduce the edge length to 89.5 cm, then the bulk modulus of the metal is:
Two capillary tubes A and B are connected in series. The length and radius of the bore of tube A are twice those of tube B. The ratio of the pressure difference across the tubes A and B is:
Water is flowing through a horizontal pipe of diameter 20 cm. If the velocity of flow of water is $\frac{50}{\pi}$ cm s$^{-1}$, then the volume of water collected in litres in 1 minute is:
A satellite P takes 2 years to make a circular orbit of radius R around the earth. The time period of another satellite Q if it moves in a circular orbit twice the orbital radius of satellite P around earth is:
A simple pendulum consists of a small bob of mass 40 g at the end of a cord of negligible mass. The angle $\theta$ between the cord and the vertical is given by $\theta = \theta_0 \cos(4t + \phi)$ rad. If the maximum kinetic energy is $1.25 \times 10^{-3}$ J, then $\theta_0$ is:
An experimental train uses 1 g of nuclear material to run. 90% of the produced energy is wasted to overcome the frictional force between the wheels and the track. If the weight of each coach is 18 ton (18000 kg) and it runs at a speed of 100 m s$^{-1}$, the number of coaches the engine can drag at a time is: