List of top Questions asked in AP EAPCET- 2023

Two springs A and B fixed at the top and are stretched by 8 cm and 16 cm respectively, when loads of 20 N and 10 N are suspended at the lower ends. The ratio of the spring constants of the springs A and B is:

The amplitudes of a damped harmonic oscillator after 2 and 4 seconds are $ A_1 $ and $ A_2 $ respectively. If the initial amplitude of the oscillator is $ A_0 $, then

A person of height 1.65 m is standing upright. The additional external force required by blood vessel of length 1 cm, diameter 1 mm at feet to balance the pressure compared to similar blood vessel in head is
(Density of blood = $1.1 \times 10^3 \, \text{kg m}^{-3}, \, g = 10 \, \text{ms}^{-2}$)

2 moles of a monatomic gas requires heat energy $ Q $ to be heated from 30°C to 40°C at constant volume. The heat energy required to raise the temperature of 4 moles of a diatomic gas from 28°C to 33°C at constant volume is:

Isothermal bulk modulus of a gas at a pressure $ P $ is:

A vessel of volume 10 liters is filled with $ H_2 $ gas. The total average translational kinetic energy of its molecules is $ 4.5 \times 10^5 \, \text{J} $. The pressure of hydrogen in the vessel is:

Small amplitude progressive wave in a stretched string has a speed of $ 100 \, \text{cm/s} $ and frequency $ 100 \, \text{Hz} $. The phase difference between two points 2.75 cm apart on the string, in radians, is:

Two thin conducting concentric shells of radii $ R_1 $ and $ R_2 $ are shown in the figure. The inner shell carries a charge $ +Q $ and the outer shell is neutral. Then the correct statement is:

A magnetic field intensity at the centre of a circular wire of radius 0.1 m carrying a current 0.2 A is:

A solenoid has a core of a material with relative permeability 400. The windings of the solenoid are insulated from the core and carry a current of 4 A. If the number of turns is 500 per metre, then the magnetizing field is:

In an ac generator, if a coil of $ N $ turns and area $ A $ is rotated at $ \nu $ revolutions per second in a uniform magnetic field $ B $, then the motional emf produced is equal to \[ (t = 0 s, the coil is perpendicular to the field) \]

The frequency of ac at which 16 $\mu F$ capacitor and $ \frac{10}{\pi} $ mH inductor will have same reactance is:

The average power output of a point source of an electromagnetic radiation is 1080 W. The maximum value of the rms value of the electric field at a distance of 3 m from the source is

The velocity of a particle A is 3 times the velocity of proton. If the ratio of the de Broglie wavelengths of the particle A and the proton is 3:2, the mass of the particle A is:

A p-n junction diode is reverse biased with a voltage of 8 V. If the resistance of the diode is $ 4 \times 10^7 \, \Omega $, then the reverse saturation current is

Identify the pair of elements with the highest and lowest electronegativity respectively

Identify incorrectly matched set from the following

A 100 L cylinder containing H2 exerted a pressure of 4 atm at 300 K. It was accidentally opened and some H2 was escaped. When it was closed, it exerted a pressure of 3 atm at 300 K. The number of moles of H2 remaining in the cylinder is equal to

Which of the following alloys are correctly matched with their uses? \[ \text{i) Li/Mg} \quad \text{armour plates} \] \[ \text{ii) Cu/Be} \quad \text{high strength springs} \] \[ \text{iii) Mg/Al} \quad \text{aircraft construction} \]

In the Kolbe electrolysis of sodium propanoate, the products X and Y are formed at the respective electrodes. What are X and Y?

20 mL of 0.1 M HCl is added to 30 mL of 0.1 M NaOH. To this solution, extra 50 mL of water was added. What is the molarity of the final solution formed?

The correct statements about Zeolites are:
1. They are good shape selective catalysts
2. They contain Al-O-Si framework
3. They are not found in nature
4. They are used as catalysts for cracking hydrocarbons in the petrochemical industry.

How many of the following metals can be purified by using zone refining method? Ni, B, Ti, In, Ge, Mn, Ag, Si, Ga

For ozone molecule consider the following:
1. It is a linear molecule with bond angle $180^\circ$
2. It is an angular molecule with bond angle $117^\circ$
3. The bond lengths of both O-O bonds are same
4. With respect to oxygen it is thermodynamically more stable
The correct options are

From the list given below, the number of lanthanides which exhibit +4 state in their compounds is: Given lanthanides: Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy