List of top Physics Questions asked in AP EAPCET

A student is at a distance \(16\,\text{m}\) from a bus when the bus begins to move with a constant acceleration of \(9\,\text{m s}^{-2}\). The minimum velocity with which the student should run towards the bus so as to catch it is \(\alpha\sqrt{2}\,\text{m s}^{-1}\). The value of \(\alpha\) is

The component of a vector \[ \vec{P}=3\hat{i}+4\hat{j} \] along the direction \[ \hat{i}+2\hat{j} \] is

A projectile is launched from the ground, such that it hits a target on the ground which is \(90\,\text{m}\) away. The minimum velocity of projectile to hit the target is \((\text{acceleration due to gravity}=10\,\text{m s}^{-2})\)

The energy \(E\) of a system is a function of time \(t\) and is given by \[ E(t)=\alpha t-\beta t^3 \] where \(\alpha\) and \(\beta\) are constants. The dimensions of \(\alpha\) and \(\beta\) are

A hydrogen atom at the ground level absorbs a photon and is excited to \(n=4\) level. The potential energy of the electron in the excited state is

Consider the statements in a semiconductor:
(A) There are no free electrons at \(0\;K\).
(B) There are no free electrons at any temperature.
(C) The number of free electrons increases with temperature.
(D) The number of free electrons is less than that in a conductor.

The radius of an atomic nucleus of mass number \(64\) is \(4.8\;fermi\). Then the mass number of another atomic nucleus of radius \(6\;fermi\) is

A carrier wave is used to transmit a message signal. If the peak voltage of modulating signal and carrier signal are increased by \(1\%\) and \(3\%\) respectively, the modulation index is changed by

A light of intensity \(12\;Wm^{-2}\) incidents on a black surface of area \(4\;cm^2\). The radiation pressure on the surface is

The electric field \((E)\) and magnetic field \((B)\) of an electromagnetic wave passing through vacuum are given by
\[ E=E_0\sin(kx-\omega t) \] \[ B=B_0\sin(kx-\omega t) \] Then the correct statement among the following is

Capacitive reactance of a capacitor in an AC circuit is \(3\;k\Omega\). If this capacitor is connected to a new AC source of double frequency, the capacitive reactance will become

In a photoelectric experiment light of wavelength \(800\;nm\) produces photoelectrons with the smallest de Broglie wavelength of \(1\;nm\). Light of \(400\;nm\) produces photoelectrons with smallest de Broglie wavelength of \(0.5\;nm\). Then the work function of the metal used in the experiment is nearly

A circular coil has \(100\) turns, radius \(3\;cm\) and resistance \(4\;\Omega\). This coil is co-axial with a solenoid of \(200\) turns/cm and diameter \(4\;cm\). If the solenoid current is decreased from \(2\;A\) to zero in \(0.04\;s\), then the current induced in the coil is

A magnetic needle free to rotate in a vertical plane parallel to the magnetic meridian has its north tip pointing down at \(30^\circ\) with the horizontal. The horizontal component of the earth's magnetic field at the place is \(0.3\;G\). Then the magnitude of the earth's magnetic field at the location is

A toroid has a non-ferromagnetic core of inner radius \(24\;cm\) and outer radius \(25\;cm\), around which \(4900\) turns of a wire are wound. If the current in the wire is \(12\;A\), the magnetic field inside the core of the toroid is

An electron takes \(40\times10^3\;s\) to drift from one end of a metal wire of length \(2\;m\) to its other end. The area of cross-section of the wire is \(4\;mm^2\) and it is carrying a current of \(1.6\;A\). The number density of free electrons in the metal wire is

The current \(i\) in the circuit shown in the figure is

Assertion (A): In a region of constant potential, the electric field is zero and there can be no charge inside the region.
Reason (R): According to Gauss law, charge inside the region should be zero if electric field is zero.

Statement (A): Inside a charged hollow metal sphere, \(E=0,\;V\neq0\). (\(E\) - electric field, \(V\) - electric potential)
Statement (B): The work done in moving a positive charge on an equipotential surface is zero.
Statement (C): When two like charges are brought closer, their mutual electrostatic potential energy will increase.

A steel wire of length \(l\) and magnetic moment \(M\) is bent into a semicircular arc of radius \(R\). The new magnetic moment is

In non-rigid diatomic molecule with an additional vibrational mode

A solid sphere of radius \(R\) carries a positive charge \(Q\) distributed uniformly throughout its volume. A very thin hole is drilled through its centre. A particle of mass \(m\) and charge \(-q\) performs simple harmonic motion about the centre of the sphere in this hole. The frequency of oscillation is

When monochromatic light of wavelength \(600\;nm\) is used in Young's double slit experiment, the fifth order bright fringe is formed at \(6\;mm\) from the central bright fringe on the screen. If the experiment is conducted with light of wavelength \(400\;nm\), then the third order bright fringe will be located at

The radii of curvature of a double convex lens are \(4\;cm\) and \(8\;cm\). If the refractive index of the material of the lens is \(1.5\), the focal length of the lens is nearly

Speed of sound in air near room temperature is approximately