List of top Questions asked in AP EAMCET

The speed of the electron in a hydrogen atom in the $ n = 3 $ level is:

If the kinetic energy of a particle in motion is decreased by 36%, the increase in de Broglie wavelength of the particle is:

Inner shell electrons in atoms moving from one energy level to another lower energy level produce:

An inductor and a resistor are connected in series to an AC source of voltage $ 144\sin(100\pi t + \frac{\pi}{2}) $ volts. If the current in the circuit is $ 6\sin(100\pi t + \frac{\pi}{2}) $ amperes, then the resistance of the resistor is:

The ratio of the number of turns per unit length of two solenoids A and B is $1:3$ and the lengths of A and B are in the ratio $1:2$. If the two solenoids have the same cross-sectional area, the ratio of the self-inductances of the solenoids A and B is:

At a place where the magnitude of the earth's magnetic field is $4 \times 10^{-5} \, T$, a short bar magnet is placed with its axis perpendicular to the earth's magnetic field direction. If the resultant magnetic field at a point at a distance of 40 cm from the center of the magnet on the normal bisector of the magnet is inclined at $45^\circ$ with the earth's field, the magnetic moment of the magnet is:

Two concentric thin circular rings of radii 50 cm and 40 cm each, carry a current of 3.5 A in opposite directions. If the two rings are coplanar, the net magnetic field due to the two rings at their centre is:

Two long straight parallel conductors A and B carrying currents 4.5 A and 8 A respectively are separated by 25 cm in air. The resultant magnetic field at a point which is a distance of 15 cm from conductor A and 20 cm from conductor B is:

In the given circuit, if the potential at point B is 24 V, the potential at point A is:

A straight wire of resistance $R$ is bent in the shape of a square. A cell of emf 12 V is connected between two adjacent corners of the square. The potential difference across any diagonal of the square is:

A particle of mass 2 g and charge 6 $\mu$C is accelerated from rest through a potential difference of 60 V. The speed acquired by the particle is:

Three parallel plate capacitors of capacitances $4 \mu F$, $6 \mu F$, and $12 \mu F$ are first connected in series and then in parallel. The ratio of the effective capacitances in the two cases is:

Three point charges $ +q, +2q, $ and $ +4q $ are placed along a straight line such that the charge $ +2q $ lies equidistant from the other two charges. The ratio of the net electrostatic force on charges $ +q $ and $ +4q $ is:

If a microscope is placed in air, the minimum separation of two objects seen as distinct is 6 µm. If the same is placed in a medium of refractive index 1.5, the minimum separation of the two objects to see as distinct is:

An object is placed at a distance of 18 cm in front of a mirror. If the image is formed at a distance of 4 cm on the other side, then the focal length, nature of the mirror and nature of the image are respectively:

A pipe with 30 cm Length is open at both ends. Which harmonic mode of the pipe resonates a 1.65 kHz source? (Velocity of sound in air = 330 m/s)

An ideal gas is kept in a cylinder of volume $3 \, {m}^3$ at a pressure of $3 \times 10^5 \, {Pa}$. The energy of the gas is

The efficiency of a Carnot's engine is 25%, when the temperature of sink is 300 K. The increase in the temperature of source required for the efficiency to become 50% is

A certain volume of a gas at 300 K expands adiabatically until its volume is doubled. The resultant fall in temperature of the gas is nearly (The ratio of the specific heats of the gas is 1.5)

The absorption coefficient value of a perfect black body is

Two mercury drops, each with same radius $ r $, merged to form a bigger drop. If $ T $ is the surface tension of mercury, then the surface energy of the bigger drop is given by

Depth of a river is $100 \, {m}$. Magnitude of compressibility of the water is $0.5 \times 10^{-9} \, {N}^{-1}{m}^2$. The fractional compression in water at the bottom of the river is (Acceleration due to gravity = $10 \, {m/s}^2$)

What is the height from the surface of earth, where acceleration due to gravity will be $ \frac{1}{4} $ of that of the earth? (Re = 6400 km)

A test tube of mass $6 \, {g}$ and uniform area of cross section $10 \, {cm}^2$ is floating in water vertically when $10 \, {g}$ of mercury is in the bottom. The tube is depressed by a small amount and then released. The time period of oscillation is: (Acceleration due to gravity = $10 \, {m/s}^2$)

A horizontal board is performing simple harmonic oscillations horizontally with an amplitude of $0.3 \, {m}$ and a period of $4 \, {s}$. The minimum coefficient of friction between a heavy body placed on the board if the body is not to slip is: