List of top Physics Questions asked in TS EAMCET

Two identical boxes A and B have thermal conductivities 180 and 270 W m$^{-1}$K$^{-1}$. Ice in A melts in 21 min. Time for half ice in B to melt is:}

Lengths of two open pipes are in ratio 5:6. If 8 beats per second are heard when both vibrate in fundamental mode, find frequency of third harmonic of longer pipe.

Focal lengths of objective = 20 m and eyepiece = 1 cm. Find angular magnification of telescope.

The temperatures of source and sink of a Carnot heat engine are $127^\circ C$ and $27^\circ C$ respectively. If the working substance is 2 moles of a rigid diatomic gas, then the decrease in internal energy during adiabatic expansion is: (R = 8.31 J mol$^{-1}$K$^{-1}$)

A wire of length 100 cm is clamped between two rigid supports and vibrates in fundamental mode. If amplitude at midpoint is A, distance between two points having amplitude $\frac{A}{\sqrt{2}}$ is:}

If the average kinetic energy of molecules of a gas at $30^\circ C$ is U, then temperature at which it becomes 2U is:

A metal wire can withstand a maximum tension of 80 N. If the wire is cut into four equal parts, then each part can withstand a maximum tension of:

If $Q_1$ is heat to convert 2 g ice at 0°C to water at 40°C and $Q_2$ for 4 g ice at 0°C to water at 80°C, find $Q_1:Q_2$ (L = 80 cal/g, c = 1 cal/g°C):

A particle executes SHM with amplitude 40 cm and time period 6 s. Minimum time to move from mean position to a point at 20 cm from extreme position is:

If W is the energy required to form a soap bubble of radius R, then energy required to increase radius from R to 3R is:

A cylindrical vessel contains two immiscible liquids A and B of densities $750$ kg m$^{-3}$ and $1000$ kg m$^{-3}$. Thicknesses are 10 m and 15 m respectively. Atmospheric pressure is $10^5$ Pa. Ratio of absolute pressures at bottom and interface is:}

If two bodies A and B of masses 5 kg and 10 kg are thrown vertically upwards from the surface of the earth with velocities $\sqrt{0.5gR}$ and $\sqrt{0.2gR}$ respectively, then the ratio of maximum heights reached by the bodies A and B is: (R = Radius of the earth)}

A body P of mass 3 kg at rest is dropped from a height of 250 m. At the same moment another body Q of mass 2 kg is thrown vertically upwards with velocity $50\text{ m s}^{-1}$. Both move along same line. The velocity of Q when centre of mass reaches maximum height is: (g = $10\text{ m s}^{-2}$)}

If a force of $(6\sqrt{3}\hat{i}-4\sqrt{2}\hat{j})\text{ N}$ acts on a body of mass 3.7 kg and displaces the body by $(2\sqrt{3}\hat{i})\text{ m}$, then the work done by the force is:}

A block of mass 2 kg is kept on a horizontal surface and is pulled with a horizontal force F. If the surface is smooth, the acceleration is $8\ \text{m s}^{-2}$. If the surface is rough with coefficient 0.25, acceleration is: (g = $10\ \text{m s}^{-2}$)}

A ball P in motion collides with another ball Q of same mass at rest. If the coefficient of restitution between the two balls is 0.2, then the ratio of the velocities of the two balls P and Q after collision is:

If the kinetic energy of a solid sphere when it rolls without slipping is 700 J, then its kinetic energy when it slips without rolling with same velocity is:

If a body is projected from the ground at an angle of $45^\circ$ with the horizontal, then the ratio of the velocities of the body at maximum height and at half of the maximum height is:

If the errors in the measurements of diameter, length and electrical resistance of a wire are 1%, 0.5% and 2% respectively, then percentage error in the determination of the resistivity of material of the wire is:

Two balls P and Q are thrown vertically upwards simultaneously from the ground with velocities $20\ \text{m s}^{-1}$ and $35\ \text{m s}^{-1}$ respectively. The distance between the two balls when the velocity of P becomes zero is: (g = $10\ \text{m s}^{-2}$)}

The fundamental force that plays a key role in the large scale phenomena of the universe is:

The frequency band of standard amplitude modulated broadcast is

The ratio of the rate of disintegration and the initial number of nuclei of a radioactive substance is $0.25~hour^{-1}$. The time taken (in hours) for the number of nuclei of this substance to become $\frac{1}{\sqrt{e}}$ times the initial number of nuclei is}

The ratio of energies of forbidden bands of silicon and germanium is nearly

A pure silicon with $6 \times 10^{28}$ atoms is doped with arsenic of 1 ppm concentration. If the intrinsic carrier concentration is $1.2 \times 10^{16} m^{-3}$, then the number of holes in the doped silicon is}