List of top Questions asked in AP EAPCET

As shown in the figure, the work done to move the charge 'Q' from point C to point D along the semi-circle CRD is

A rectangular slab consists of two cubes of copper and brass of equal sides having thermal conductivities in the ratio $4 : 1$. If the free face of brass is at $0^\circ \text{C}$ and that of copper is at $100^\circ \text{C}$, then the temperature of their interface is

A ray of light incidents at an angle of $60^\circ$ on the first face of a prism. The angle of the prism is $30^\circ$ and its second face is silvered. If the light ray inside the prism retraces its path after reflection from the second face, then the refractive index of the material of the prism is

If a body is thrown vertically upwards from the ground with a velocity of 20 m/s, then its displacement during the last second of upward motion is (Acceleration due to gravity $g=10\,m/s^2$):

In the given circuit, the input voltage across base resistance 10V. If base-emitter and collector-emitter voltages are zero, then the current amplification factor of the transistor is:

Two concentric loops of radii 'r' and 'R' are in same plane such that $ R \gg r $. If a current $ I $ is maintained in the loop of radius $ r $, then the magnetic flux associated with the loop of radius 'R' due to this current is

Three identical bar magnets each of magnetic moment $ M $ are placed in the form of an equilateral triangle with north pole of one touching the south pole of the other. The net magnetic moment of the system of magnets is

In Young’s double slit experiment, the wavelengths of red and blue lights used are $7.5 \times 10^{-5}$ cm and $5 \times 10^{-5}$ cm respectively. If the $n^{th}$ bright fringe of red color coincides with $(n+1)^{th}$ bright fringe of blue colour, then the value of $ n $ is

The resonant frequency of an LC circuit is $ f_0 $. If a dielectric slab of constant 16 is inserted completely between the plates of the capacitor, then the resonant frequency is

In a plane electromagnetic wave, the magnetic field is given by $\mathbf{B} = 3 \times 10^{-7} \sin (100 \pi x + 10^{12} t)\, T$, then the wavelength of the wave is (In the equation $x$ is in metre and $t$ is in seconds)

If a stone thrown vertically upwards from a bridge with an initial velocity of $5 \operatorname{ms}^{-1}$, strikes the water below the bridge in a time of 3 s, then the height of the bridge above the water surface is (Acceleration due to gravity = $10 \operatorname{ms}^{-2}$)

The height of ceiling in an auditorium is 30 m. A ball is thrown with a speed of $ 30 \, \text{m s}^{-1} $ from the entrance such that it just moves very near to the ceiling without touching it and then it reaches the ground at the end of the auditorium. Then the length of auditorium is [Acceleration due to gravity $ = 10 \, \text{m s}^{-2} $]

A particle of mass $ 0.2 $ g and charge $ 2 $ C is released from rest in a uniform electric field of $ 20 $ N/C. The kinetic energy of the particle after moving a distance of $ 20 $ cm is:

Materials suitable for permanent magnets should have:

If the wavelengths of maximum intensity of radiation emitted by two black bodies A and B are $ 0.5 \, \mu\text{m} $ and $ 0.1 \, \text{mm} $ respectively, then ratio of the temperatures of the bodies A and B is

The voltage gain and the current amplification factor of a transistor in common emitter configuration are $ 300 $ and $ 60 $ respectively. If the collector resistance is $ 5 k\Omega $, then the base resistance is:

The displacement (s) - time (t) graphs of two bodies A and B are shown in the figure. The ratio of the velocities of the two bodies A and B is

A closed pipe and an open pipe of same length produce 4 beats per second when they are set into vibrations simultaneously. If the lengths of both the pipes were halved, then the number of beats produced per second is: (Assume same mode of vibrations in both cases)

If the intensities of two interfering light waves in a medium are I and 4I, then the maximum and minimum intensities are respectively:

A short bar magnet is placed in a uniform magnetic field of $2~\text{T}$ such that the axis of the magnet makes an angle of $45^\circ$ with the field. If the torque acting is $0.36~\text{Nm}$, the magnetic moment of the magnet is

A refrigerator of coefficient of performance 5 that extracts heat from the cooling compartment at the rate of 250 J per cycle is placed in a room. The heat released per cycle to the room by the refrigerator is

If the wavelengths of maximum intensity of radiation emitted by two black bodies A and B are $ 0.5 \, \mu\text{m} $ and $ 0.1 \, \text{mm} $ respectively, then ratio of the temperatures of the bodies A and B is

The work done to increase the volume of 2 moles of an ideal gas from $ V $ to $ 2V $ at a constant temperature $ T $ is $ W $. The work to be done to increase the volume of 2 moles of the same gas from $ 2V $ to $ 4V $ at the same constant temperature $ T $ is:

If a charged particle enters a uniform magnetic field normally with certain velocity, then the time period of revolution of the particle:

Materials suitable for permanent magnets should have: