List of top Questions asked in AP EAPCET

In a Young's double slit experiment, if the wavelength of light is increased by 50% and the distance between the slits is doubled, then the percentage change in fringe width is:

The net electric flux due to a uniform electric field of \( 3 \times 10^3 \, \text{NC}^{-1} \) through a cube of side 20 cm oriented such that its faces are parallel to the coordinate planes is:

The drift velocity of electrons in a conducting wire connected to a cell is \( V_d \). If the length of the wire is doubled and area of cross-section is halved, then the drift velocity of electrons becomes:

The relation between permittivity of free space, the permeability of free space and speed of light is:

One of the following substances having the tendency to move from stronger region to the weaker region of the magnetic field is:

The Lenz law is associated with

The centripetal acceleration $a$ of an electron in an orbit of hydrogen and the principal quantum number $n$ of the orbit are related by

The radius of the nucleus of an atom whose mass number is 125 is

In a transistor, when the emitter current changes by 9.85 mA, the collector current changes to 9.5 mA. Then the base current is

Band width of an optical fiber is

Which of the following electron arrangement does not obey Hund’s rule?

At 300 K, one mole of a gas present in a 10 L flask exerted a pressure of 2.706 atm. What is its compressibility factor (Z)?

At T (K), equal weights of H$_2$, D$_2$, and T$_2$ are present in closed vessel. The pressure exerted by this gaseous mixture is P atm. The ratio of partial pressures of T$_2$, D$_2$ and H$_2$ is approximately (H, D and T are isotopes of hydrogen).

The correct order of melting points of Al, Ga, In is:

Match the following

The most effective coagulating agent for antimony sulphide sol is:

Identify the correctly matched pairs.

1. \(\mathrm{TiO_2}\) – Pigment industry
2. \(\mathrm{MnO_2}\) – Dry battery cells
3. \(\mathrm{Cu/Ni}\) alloy – UK 'copper' coins

In which of the following pairs the polymer is correctly matched with the forces possessed by them?
A. Neoprene —- Weak intermolecular forces
B. Terylene —- Hydrogen bonding
C. Polystyrene —- Very weak intermolecular forces
D. Polythelene —- Hydrogen bonding

Hypothyroidism is due to
A. High level of iodine in the diet
B. Enlargement of thyroid gland
C. Low levels of iodine in the diet
D. Increased levels of thyroxine

Ortho-sulphobenzimide is used as:

Two statements are given below
Statement I: Chlorobenzene on nitration gives 1-chloro-4-nitrobenzene as major product
Statement II: Chlorobenzene undergoes nitration slowly than benzene
Identify the correct answer

In SN2 reaction, the carbon in the transition state is:

Identify X, Y and Z in the following reactions sequence:

Which of the following produces nitrogen gas after the reaction with nitrous acid?