List of top Physics Questions asked in TS EAMCET

Two identical balls having like charges placed at a certain distance apart, repel each other with a force $ F $. When they are brought in contact and then moved apart to a distance equal to half of their initial separation, the force of repulsion between them becomes $ 4.5F $. The ratio of the initial charges of the balls is:

The capacitance of a parallel plate capacitor is 1.5 µF. If the distance between the plates is halved and the space between the plates is filled with a medium of dielectric constant 3, then the new capacitance is:

If the relaxation time is doubled and the applied electric field is tripled, then the drift speed of electrons:

Two equal resistances are connected in the two gaps of a meter bridge. If the resistance in the right gap is doubled, then the change in the balancing length is:

In Bohr model of hydrogen atom, if the difference between the radii of $ n^{th} $ and $ (n+1)^{th} $ orbits is equal to the radius of the $ (n-1)^{th} $ orbit, then the value of $ n $ is:

Three logic gates are connected as shown in the figure. If the inputs are $ A = 0 $, $ B = 1 $, and $ C = 1 $, then the values of $ y_1 $, $ y_2 $, and $ y_3 $ are respectively:

The power gain of a transistor operating in common emitter configuration is 32,000. If the input and output resistances of the circuit are 1200 $ \Omega $ and 6000 $ \Omega $ respectively, then the current gain is:

If two linear antennas having lengths in the ratio 2:3 are emitting radiations of wavelengths in the ratio 8:9, then the ratio of effective powers radiated by them are in the ratio:

Two photons of energies 2.5 eV and 5.5 eV incident on a metal surface of work function 1.5 eV. The ratio of the maximum speeds of the photoelectrons emitted from the metal surface is:

In a nuclear reactor of efficiency 25\%, the number of fissions taking place per second is $ 5 \times 10^{13} $. If 200 MeV energy is released per fission, then the output power of the reactor is:

In a radioactive sample $ 2 \times 10^8 $ nuclei reduce to $ 10^8 $ nuclei in 15 minutes, then the half-life of the sample in minutes is:

The ratio between electric field energy density and magnetic field energy density of an electromagnetic wave, in its region is:

The quality factor of a series LCR resonant circuit is 75. If the resistance is decreased by 50\% and the inductance is increased by 100\%, then the quality factor of the circuit is:

A current $ i $ flows through a circular loop of radius $ R $. The ratio of the magnetic field produced at its centre to the field produced at a point at a distance $ \frac{R}{\sqrt{3}} $ from its centre on its axis is:

Two particles of charges in the ratio $ 1:2 $ and masses in the ratio $ 2:3 $ moving along a straight line enter a uniform magnetic field at right angles to the direction of the field. If the radii of the circular paths of the particles in the magnetic field are in the ratio $ 3:4 $, then the ratio of the initial linear momenta of the two particles is:

Magnetic field on the axis of a short bar magnet of magnetic moment $ M $, at a distance $ x $ from its centre is:

The self-induced emf of a coil is 36 V. If the current in the coil is changed from 12 A to 24 A in one second, then the change in the energy stored in the coil is:

If the tension applied to a string is decreased by 36\%, then the fundamental frequency of the transverse waves of the string is:

The frequency of sound heard by a stationary observer is $ f_1 $, when the source of sound is approaching the observer with a speed of 10\% of the speed of sound. If the same source of sound is moving away from the stationary observer with a speed of 20\% of the speed of sound, the frequency of sound heard by the observer is $ f_2 $. Then $ f_1 : f_2 $ is:

A boy of height 1.2 m is standing in front of a large concave mirror of radius of curvature 20 m at a distance of 40 m from the mirror. The distance of the image of the boy from the boy is:

A black body at a temperature of 125$^\circ$C emits heat at the rate of 32 W. The rate of heat emitted by the body when the temperature of the body is increased by 398 K is:

An arc making an angle $15^\circ$ at the center is removed from a ring of mass $ M $ and radius $ R $. The moment of inertia of the remaining ring about an axis passing through its center and perpendicular to its plane is:

A 60 kg man standing on a bridge, jumps vertically down onto a 540 kg boat moving in the river below him with a speed of 10 m/s. The change in the speed of the boat is:

A supposition without assuming that it is true is:

The density of a substance of mass 5.318 g which occupies a volume of 2.43 cm³ is (up to correct significant figures):