List of top Physics Questions asked in TS EAMCET

Ice of mass \(80\,\mathrm{g}\) at a temperature of \(-10^\circ\mathrm{C}\) is mixed with water of mass \(100\,\mathrm{g}\) at a temperature of \(20^\circ\mathrm{C}\).

The ratio of the masses of ice and water in the mixture at equilibrium is 

Given:

  • Latent heat of fusion of ice \(= 80\,\mathrm{cal\,g^{-1}}\)
  • Specific heat capacity of water \(= 1\mathrm{cal\,g^{-1}^\circ C^{-1}}\)
  • Specific heat capacity of ice \(= 0.5\mathrm{cal\,g^{-1}^\circ C^{-1}}\)
If the peak voltage of message signal is \(60\%\) less than the peak voltage of the carrier wave, then the modulation index is
If the band gap of a semiconductor is equal to the energy of a photon of wavelength \(620\) nm, then the minimum thermal energy required for the generation of \(8\) electron-hole pairs is nearly
The current gain of a common emitter amplifier is \(50\) and its power gain is \(3000\). If the input resistance of the amplifier is \(1200\,\Omega\), then its output resistance is
If a graph is drawn between the binding energy per nucleon and the mass number of nucleus, then the mass number of the nucleus for which the binding energy per nucleon has a maximum value is
When an inductor and a resistor are connected in series to an AC source, the power factor of the circuit is \[ \frac{2}{\sqrt{13}}. \] If the same resistor and a capacitor are connected in series to the same AC source, then the power factor of the circuit is \[ \frac{1}{\sqrt2}. \] If these inductor, capacitor and resistor are connected in series to the same AC source, then the ratio of the resistance and impedance of the LCR circuit is
If the current passing through a coil of self-inductance \(50\) mH having \(50\) turns is \(5\) A, then the magnetic flux linked with the coil (in \(10^{-3}\) Wb) is
If the time period of an electron in the ground state of hydrogen atom is \(1.5\times10^{-16}\) s, then the time period of the electron in the third excited state of hydrogen atom is
If the mean life of a radioactive substance is \[ \frac{20}{\ln4} \] minutes, then the ratio of the number of atoms remaining undecayed and the number of atoms decayed of the substance at a time of \(30\) minutes is
If an electron initially at rest is subjected to a uniform electric field of \(4125\ \mathrm{NC^{-1}}\), then the de Broglie wavelength associated with the electron at time \(t=2\times10^{-9}\) s is \[ (\text{Planck's constant}=6.6\times10^{-34}\ \mathrm{Js}) \]
The wavelength range of the electromagnetic waves suitable for radar systems used in aircraft navigation is
If the potential difference across the ends of a copper wire of \(100\) cm length is \(2\) V and the conductivity of copper is \[ 5.95\times10^7\ \mathrm{Sm^{-1}}, \] then the current per unit area (in \(\mathrm{Am^{-2}}\)) of the conductor is
A bar magnet of magnetic moment \(1.8\ \mathrm{Am^2}\) is free to rotate about a vertical axis passing through its centre at a place where the vertical component of earth's magnetic field is \[ 0.3\times10^{-4}\text{ T} \] and the dip angle is \(45^\circ\). If the magnet at rest in east-west direction is released, then the kinetic energy (in \(\mu\)J) of the magnet when it reaches north-south direction is
A potentiometer wire of length \(10\) m and resistance \(9\,\Omega\) is connected to a cell of emf \(E\) and internal resistance \(1\,\Omega\). If \(V\) is the maximum potential difference that can be measured using the potentiometer, then the condition for the potentiometer to work is
Two identical circular coils each of radius \(R\) and number of turns \(N\) are arranged coaxially with a separation of \(R\) between their centers. If the current through each coil is \(I\), then the maximum resultant magnetic field induced at the midpoint of the line joining the centers of the two coils is
If a capacitor is charged by connecting it to a battery, then the ratio of work done by the battery and the energy stored in the capacitor is
The maximum kinetic energy of a proton ejected from a cyclotron with dees of radius \(70\) cm and oscillating frequency \(5\) MHz (in MeV) is \[ (\text{Mass of proton}=1.67\times10^{-27}\text{ kg}) \]
A card divided into squares each of size \(1\ \mathrm{mm^2}\) is viewed through a magnifying glass of focal length \(10\) cm which is held close to the eye. The distance at which the lens is to be placed from the card to view the squares with maximum possible magnification is
If the angles of minimum deviation when a prism of angle \(80^\circ\) is placed separately in air and in a liquid are \(40^\circ\) and \(10^\circ\) respectively, then the refractive index of the liquid is
A long charged cylinder of linear charge density \(\lambda\) is surrounded by a hollow coaxial conducting cylinder. The magnitude of electric field in the space between the two cylinders at a distance \(R\) from the common axis of the cylinders is
A polaroid \(P\) is placed between two crossed polaroids \(Q\) and \(R\) such that when unpolarised light is incident on \(Q\), it emerges from \(R\) with maximum possible intensity. The ratio of intensity of unpolarized light incident on \(P\) and the intensity of polarized light emerging from \(R\) is
The speed of a progressive transverse wave on a string is \(18\ \mathrm{ms^{-1}}\). If the phase difference between two points on the string separated by a distance of \(3\) cm is \(90^\circ\), then the frequency of the transverse wave on the string is
A source producing sound of frequency \(990\) Hz and an observer are initially at rest. If both the source and observer start moving simultaneously towards each other with accelerations \(2\ \mathrm{ms^{-2}}\) and \(4\ \mathrm{ms^{-2}}\) respectively, then the frequency of sound heard by the observer at a time \(t=5\) s is \[ (\text{Speed of sound in air}=340\ \mathrm{ms^{-1}}) \]
At a constant pressure of \[ 2\times10^5\ \mathrm{Nm^{-2}}, \] if the volume of \(4\) moles of a monoatomic gas changes from \(1000\) cc to \(1500\) cc, then the change in internal energy of the gas is
An air bubble rises from the bottom of a lake of depth \(37\) m. The temperature of the lake is constant from the bottom to the top and atmospheric pressure is equal to the pressure due to \(10\) m of water column. The percentage increase in the volume of the bubble when it rises from a depth of \(20\) m to a depth of \(15\) m is