List of top Questions asked in AP EAPCET

A particle of mass \(2 \times 10^{-27} \, \text{kg}\) has de-Broglie wavelength of \(3.3 \times 10^{-10} \, \text{m}\). The kinetic energy of this particle is: (Given: Planck’s constant \( h = 6.6 \times 10^{-34} \, \text{Js} \))

Gabriel phthalimide synthesis is used for the preparation of which of the following?

The rate for \( S_N1 \) reaction will be faster for which of the following bromides?

In ruby and emerald, the metal ion(s) present is/are:

Curdling of milk is caused due to the formation of which of the following acids by bacteria?

The sol formed in the following unbalanced equation is: \[ \text{As}_2\text{O}_3 + \text{H}_2\text{S} \rightarrow ? \]

The correct statements with respect to halides of group 14 elements are:
(I) Both CCl4 and SiCl4 undergo hydrolysis.
(II) GeX4 is more stable than GeX2.
(III) PbX4 is less stable than PbX2.
(IV) Stability of dihalides decreases down the group.

Which of the following is not a disproportionation reaction?

The combination of which of the following gives an ionic compound with maximum covalent character?

The number of valence electrons present in an element with atomic number 117 is:

In which of the following, the elements Al, B, Mg, and K are correctly arranged in the increasing order of their metallic character?

The ratio of radii of 3rd and 6th Bohr’s orbits in a hydrogen atom is:

A plane electromagnetic wave of frequency \(50 \, \text{MHz}\) travels in free space. If the average energy densities in the electric and magnetic fields are \(K_E\) and \(K_B\), then:

The values of \( Y \) and \( Z \) in the given logic circuit are:

A \(70 \, \text{mH}\) inductor is connected to a \(220 \, \text{V}, 50 \, \text{Hz}\) AC supply. The RMS value of the current in the circuit is:

An isosceles triangular current-carrying loop is kept perpendicularly in a uniform magnetic field \( \vec{B}_0 \) as shown in the figure. The force on the loop due to magnetic field is:

A charged particle is moving in a uniform magnetic field and enters a lead layer, losing half of its kinetic energy. The radius of curvature of its path becomes:

A metal loop of area \(10 \, \text{cm}^2\) is placed in a region such that its area vector points along \( \hat{k} \). The region contains a uniform magnetic field of magnitude \(1.73 \, \text{T}\) that points in the direction \( \hat{i} + \hat{j} + \hat{k} \). When the magnetic field is switched off, the field decreases to zero at a steady rate in 10 seconds. The magnitude of emf induced in the loop is:

A short bar magnet placed with its axis at \(45^\circ\) with a uniform external magnetic field of \(28.3 \times 10^{-3} \, \text{T}\) experiences a torque of magnitude \(3.6 \times 10^{-5} \, \text{J}\). The magnitude of magnetic moment of the magnet is nearly:

The quantities that don’t change when a resistor connected to a battery is heated due to the current are:

A battery with a \(12\,\text{V}\) emf has an initial charge of \(80\,\text{A·h}\). If the potential across the terminals remains constant until it is fully discharged, how long can the battery deliver energy at a rate of \(120\,\text{W}\)?

A beam of light reflects and refracts at the surface between air and glass. The index of refraction of the glass is \(1.4\). If the refracted and reflected rays are perpendicular to each other, then the angle of incidence in the air is:

Electric potential due to a space is given by: \[ \phi(x, y, z) = \phi_0 \cdot \frac{x_0}{x} \] where \( x_0 = 5\,\text{m}, \phi_0 = 8\,\text{V} \). Find the electric field at the point (10 m, 5 m, 5 m).

Among the following, the equation representing a progressive wave is:

A charge \( Q \) is to be divided between two objects. The values of the charges on the objects so that the electrostatic force between them will be maximum is: