List of top Questions asked in AP EAPCET- 2026

Two radioactive materials $A_1$ and $A_2$ have half-life periods 20 s and 10 s respectively. Initially a mixture of these materials contain 40 g of $A_1$ and 160 g of $A_2$. The time taken for $A_1$ and $A_2$ to become equal in the mixture is:
Two identical parallel metal plates A and B, having fine holes at their centers are connected to a power supply as shown in the figure. An electron having energy 200 eV is directed to pass through these holes from A to B. The de Broglie wavelength of the electron when it comes out of plate B is:
In the part of a circuit shown in figure, determine the current through 20 $\Omega$ resistance, if Potential at 'A' is 30 V, Potential at B = Potential at C = 20 V: figure [H]
figure
If the mean free path of a nitrogen molecule in a vessel containing nitrogen at a pressure of 2.1 atm and a temperature of $27^{\circ}C$ is $\lambda$, then its mean free path at a pressure of 1.65 atm and a temperature of $57^{\circ}C$ is:
A thin square shaped copper plate of uniform mass distribution of side 4 m has its centre of mass at (2, 2). If at its top right corner, a square of 2 m side is cut from the plate, the centre of mass of the remaining plate is:
A man weighing 80 kg is standing on a trolley weighing 320 kg. The trolley is resting on frictionless horizontal rails. If the man starts walking on the trolley with a speed of 1 $ms^{-1}$, then after 4 seconds his displacement relative to the ground will be:
From the point of view of significant figures, which of the following is/are correct? (i) $1.3~cm + 4~cm = 15.3~cm$ (ii) $4.53~m - 1.2~m = 3.3~m$ (iii) $5.45~kg - 3.2~kg = 2.25~kg$ (iv) $4.8~cm + 48.6~cm = 133~cm$
Which of the following vitamins is water-soluble?
Aspirin is chemically known as
The unit of rate constant for a first-order reaction is
Which of the following alkali metals has the lowest melting point?
Temporary hardness of water is due to the presence of
The pH of a $0.01\text{ M NaOH}$ solution is
Which of the following is a conjugate acid-base pair?
A p-n junction diode acts as a closed switch when it is
Which of the following quantum numbers determines the shape of an orbital?
According to Bohr's model, the angular momentum of an electron in a stable orbit is an integral multiple of
The work function of a metal depends on
In an AC circuit containing only an inductor, the current


In a Wheatstone bridge, the bridge is balanced when the ratio of the resistances in the four arms satisfies
A wire of resistance $R$ is stretched to double its original length. Its new resistance will be
Two copper wires of length $L$ and $2L$ have radii $r$ and $2r$ respectively. If they are subjected to the same tension force, the ratio of their extension ($\Delta L_1 / \Delta L_2$) is:
A lift of mass $M$ is accelerating upwards with an acceleration $a$. If the tension in the supporting cable is $T_1$ during upward acceleration and $T_2$ when it accelerates downwards with the same acceleration $a$, then the ratio $T_1 / T_2$ is:
A thin circular ring of mass $M$ and radius $R$ is rotating about its central axis with a constant angular velocity $\omega$. Two objects, each of mass $m$, are gently attached to the opposite ends of a diameter of the ring. The new angular velocity of the ring is:
If the sum of two roots of the cubic equation $x^3 - 5x^2 - 2x + 24 = 0$ is $2$, then the roots of the equation are: