List of top Physics Questions asked in AP EAPCET

The orbital velocity of a body near the surface of a planet 'A' is equal to escape velocity of a body from the planet 'B'. If the masses of planets A and B are same, the ratio of their radii is:
A spherical ball of volume 2000 cm\(^3\) is subjected to a hydraulic pressure of 15 atm. If the change in volume is \( 5 \times 10^{-2} \) cm\(^3\), the bulk modulus of the material of the spherical ball is:
The gauge pressure at a depth of 50 m in a sea is
The emissivity of a perfect black body is increased to 16 times by increasing its temperature. If the initial temperature is \( T \), then final temperature of that black body is:
The temperature of the sink of a Carnot's engine is 300 K and the efficiency of the engine is 0.25. If the temperature of the source of the engine is increased by 100 K, the efficiency of the engine increases by
A monatomic gas of volume \( V \) and pressure \( P \) expands isothermally to a volume \( 27V \) and then compressed adiabatically to a volume \( V \). The final pressure of the gas is:
The specific heat capacity of a monatomic gas at constant volume is \( x % \) of its specific heat capacity at constant pressure. Then \( x \) =
The number of rotational degrees of freedom of a monatomic molecule is:
A string of length \( L \) is stretched by \( \frac{L}{20} \) and the speed of transverse waves along it is \( v \). The speed of the wave when it is stretched by \( \frac{L}{10} \) will be:
The magnifying power of a telescope with tube length 60 cm is 5. Then the focal length of its eye piece is:
In a Young's double slit experiment, if the wavelength of light is increased by 50% and the distance between the slits is doubled, then the percentage change in fringe width is:
The net electric flux due to a uniform electric field of \( 3 \times 10^3 \, \text{NC}^{-1} \) through a cube of side 20 cm oriented such that its faces are parallel to the coordinate planes is:
A block of mass \( m \) and charge \( q \) is connected to a point 'O' with an inextensible string. This system is on a horizontal table. An electric field \( E \) is applied perpendicular to the string and in the plane of the horizontal table. The tension in the string when it becomes parallel to the electric field is:
Two capacitors of capacity 4 μF and 6 μF are connected in series to a 500 V battery. The potential difference across the 4 μF capacitor is:
In the given circuit, if the current flowing through 5 \( \Omega \) resistor is 0.5 A, then the value of \( E \) is:
current flowing through 5 Ω resistor is 0.5 A
The drift velocity of electrons in a conducting wire connected to a cell is \( V_d \). If the length of the wire is doubled and area of cross-section is halved, then the drift velocity of electrons becomes:
The relation between permittivity of free space, the permeability of free space and speed of light is:
The magnetic force \( q [v \times B] \) is
One of the following substances having the tendency to move from stronger region to the weaker region of the magnetic field is:
The Lenz law is associated with
An inductor and a resistor are connected in series to an AC source. If the power factor of the circuit is 0.5, the ratio of the resistance of the resistor and the reactance of the inductor is:
The device used to detect infrared radiations is

The de Broglie wavelength of the most energetic photoelectrons emitted from a photosensitive metal of work function \( \phi \), when light of frequency \( \nu \) is incident on it, is \( \lambda \). Then find \( \nu \) in terms of Planck’s constant \( h \), mass of electron \( m \), and other constants.  

The centripetal acceleration $a$ of an electron in an orbit of hydrogen and the principal quantum number $n$ of the orbit are related by
The radius of the nucleus of an atom whose mass number is 125 is