List of top Physics Questions asked in TS EAMCET

A Zener diode of breakdown voltage 6 V is connected as shown in the circuit. The power dissipated in the Zener diode is
Five logic gates are connected as shown in the figure. If the inputs are A=C=1 and B=D=0, then the values of y1 and y2 respectively are
In a nuclear fusion reaction, if the mass defect is 0.25%, then the energy released in the fusion of 400 $\mu$g mass of a substance is
If the mean life of a radioactive sample is 10 minutes, then the time (in minutes) taken for the activity of the radioactive sample to become $\mathrm{e}^{21}$ times its initial activity is
The height of a television transmitting antenna is 70 m. If the receiving antenna is at the ground level, then the service area covered by the transmitting antenna is nearly (Radius of the earth = 6400 km)
The de Broglie wavelength associated with an electron accelerated through a potential difference of 2400 V is nearly
The distance of closest approach of an alpha particle from a nucleus when the alpha particle moves towards a nucleus with a kinetic energy 'E' is 'x'. The distance of closest approach when the alpha particle approaches the same nucleus with kinetic energy 0.4E is
Klystron valve is used to produce
A galvanometer of resistance 8 $\Omega$ gives full scale deflection for a current of 4 mA. The resistance to be connected in series to the galvanometer to convert it into a voltmeter to measure a maximum potential difference of 20 V is
A 132 V ac source is connected to a pure inductor of inductance 140 mH. If the frequency of the ac source is 50 Hz, then the current passing through the inductor is
If the magnetization of a bar magnet of area of cross-section 0.75 cm$^2$ and magnetic moment 2.7 Am$^2$ is $4 \times 10^5$ Am$^{-1}$, then the length of the magnet is
A wheel with 12 metallic spokes each 40 cm long is rotated with an angular speed of 15 rads$^{-1}$ in a plane normal to the horizontal component of earth's magnetic field. If the horizontal component of earth's magnetic field at the place is $4\times10^{-5}$ T, then the induced emf between the axle and the rim of the wheel is
The charge on a parallel plate capacitor is 200 μC and its capacitance is 4 μF. If the distance between the plates of the capacitor is 2 mm, then the electric force between the plates of the capacitor is
If the time period of an alpha particle rotating in a circular path of radius 2 fermi is 3.14 $\mu$s, then the magnetic field induced at the centre of the circle is nearly
Two resistors of resistances 4 $\Omega$ and 8 $\Omega$ are connected in parallel in the left gap of the meter bridge and two resistors of resistances 8 $\Omega$ and 4 $\Omega$ are connected in series in the right gap of the meter bridge. The balancing length from the left end of the bridge wire is
When a cell is connected across a resistance $R$, the current through it is 0.7 A and when the same cell is connected across a resistance $2R$, the current through it is 0.42 A. If the same cell is connected across a resistance $3R$, the current through it is
When three particles each having a positive charge $q$ are placed at the three vertices of an equilateral triangle, then the electrostatic force between any two particles is $F$. If a fourth particle of charge $3q$ is placed at the midpoint of one of the sides of the triangle, then the net electrostatic force on the fourth particle due to the remaining three particles is
The wavelength of the monochromatic light used in Young's double slit experiment is 550 nm and the screen is placed at a distance of 120 cm from the plane of the slits. If third dark fringe is formed on the screen at a distance of 1.5 mm from the central bright fringe, then the distance of separation between the two slits is
A layer of oil of thickness 5.8 cm is floating on a water layer of thickness 8 cm. If the total apparent depth is 10 cm and the refractive index of water is 3/4, then the refractive index of oil is
During adiabatic compression of an ideal gas at an initial pressure $P$, the final density of the gas becomes $n$ times its initial value. The final pressure of the gas is ($\gamma$ is the ratio of the specific heats of the gas at constant pressure and constant volume)
The successive frequencies produced by an organ pipe are 330 Hz, 440 Hz and 550 Hz. If the speed of sound in air is 330 m/s then the length of the organ pipe is
In the experiment of a convex lens, if the distance between the object and its real image is 90 cm and the magnification produced by the lens is 2, then the focal length of the convex lens is
A wire under a tension of 144 N vibrating in its fundamental mode gives 5 beats per second with a tuning fork. When the tension applied to the wire is increased to 169 N, the number of beats heard per second remains the same. The frequency of the tuning fork is
The temperature at which the rms speed of hydrogen molecules is same as the rms speed of oxygen molecules at a temperature of $6495^\circ$C is
A spherical shell of radius 1 m, made of a steel sheet of thickness 5 mm and completely filled with ice at $0^\circ$C is immersed in boiling water. The time taken for the ice to melt completely is (Thermal conductivity of steel = $45~\text{Wm}^{-1}\text{K}^{-1}$ and density of ice is $0.9~\text{g cm}^{-3}$)