List of top Questions asked in AP EAPCET- 2023

A capacitor and a resistor are connected in series to an ac source of variable frequency. When the frequency of the ac source becomes $ \frac{1}{3} $rd of its initial value, the current in the circuit decreases by 50%. The power factor of the circuit at the initial frequency is
A slit of width 'a' is illuminated normally by white light for red light ($ \lambda = 6500 \, \text{Å} $). The first minima is obtained at $ \theta = 30^\circ $. Then the value of 'a' is
The relation between focal length (f) and radius of curvature (R) of a spherical mirror is
If L is the inductance and C is the capacitance, then the frequency of a transistor oscillator is directly proportional to

A torch bulb rated as 4.5 W, 1.5 V is connected in the circuit as shown in the figure. If the bulb glows with maximum intensity, then the emf (E) is nearly

A radioactive element A with half life 3 hours decays to a stable element B. After a time $ t $, the ratio of A and B atoms is 1:16 then the time $ t $ in hours is
The materials which can be stretched to cause large strains are called as
From an elevated point 'A', a stone is projected vertically upwards. The velocity of the stone when it reaches a distance 'h' below 'A' is double its velocity when it was at a height 'h' above 'A'. The greatest height attained by the stone above 'A' is
In a medium in which a transverse progressive wave is travelling, the phase difference between two points with a separation of 1.25 cm is $ \frac{\pi}{4} $. If the frequency of the wave is 1000 Hz, the wave velocity will be
The time period of revolution of an electron in an orbit of principal quantum number $ n $ is $ T $. If the relation between time period and principal quantum number is $ T \propto n^3 $, then $ x = $
An electron moving along positive x-direction with velocity \( 2 \times 10^5 \) ms\(^{-1}\) enters a magnetic field of \( \vec{B} = \hat{i} + 4 \hat{j} + 3 \hat{k} \) T. The magnitude of the force acting on the electron is:
A magnetic field of 1 T is acting on a wire carrying a current of 1 A so that the wire is at rest in air. If the mass of the wire is 100 g, then the length of the wire is:
n-type semiconductor is formed when germanium is doped with:
In a transistor amplifier used in CE configuration, the phase difference between input voltage and output voltage is:
The most accurate measurement among the following is:
The magnitude of electric field intensity \( E \) is such that, an electron placed in it would experience an electrical force equal to its weight. Then the value of \( E \) is:
A changing current in a coil can induce an emf in a nearby coil. This process is:
The time taken by a net force of 10 N to change the velocity by 4 m/s of a body of mass 10 kg is:
The charge flowing through a resistance \( R \) varies with time as \( q = at - bt^2 \), where \( a, b \) are positive constants. The total heat produced in \( R \) is:
The translational kinetic energy of a circular disc of mass 1.5 kg rolling on a horizontal surface without slipping is 24 J. The total kinetic energy of the disc is:
The resistance \( R \), the inductive reactance \( X_L \), and the capacitive reactance \( X_C \) of a series LCR circuit connected to an ac source are related by \( R = 0.6 X_L = 3 X_C \). The impedance of the circuit is:

In the given circuit, the reading of the ammeter is:

Two capacitors of capacities 10 µF and 20 µF are connected in series across a 200 V source. The charged capacitors are disconnected from the source and reconnected in parallel with their positive plates together. The potential difference across each capacitor is:
The de Broglie wavelength of an electron in the first orbit of hydrogen atom is:
The variation of charge \( q \) with time \( t \) on a parallel plate capacitor is given by \( q = q_0 \cos(\omega t) \). The displacement current through the capacitor is: