List of top Physics Questions asked in AP EAPCET

If the mean life of a radioactive substance is 12 minutes, then the time (in minutes) at which the fraction of atoms disintegrated becomes $\frac{e^2 - 1}{e^2}$ is
If the radius of a circular coil is doubled and the number of turns is halved, then the magnetic field at the centre of the coil for the same current is
To dissociate a molecule into its component atoms, the energy required is 13.2 eV. The frequency of the electromagnetic radiation corresponding to this energy lies in the:
If a particle of mass \( 6 \times 10^{-30} \) kg is moving with a speed of \( 5.5 \times 10^5 \text{ m s}^{-1} \), then the de Broglie wavelength of the particle is
(Planck's constant = \( 6.6 \times 10^{-34} \text{ J s} \))
The current in a coil decreases from 5 A to zero in a time of 0.1 s. If an average emf of 200 V is induced, then the self inductance of the coil is
In a hydrogen atom, if an electron makes a transition from the fourth orbit to the second orbit, then the wavelength of the emitted radiation is: (R = Rydberg constant)
If an electric bulb is rated at 50 W for a 220 V ac supply, then the resistance of the bulb and the peak voltage of the ac source are respectively:
If the earth's magnetic field at a certain place has a horizontal component of $ 5 $ gauss and a total field of $ 13 $ gauss, then the angle of dip at that place is:
A sphere of radius R and charge 'Q' is placed inside an imaginary sphere of radius 2R such that the centres of two spheres coincide. The electric flux linked with the imaginary sphere is
If the charge on a capacitor of capacitance 15 $\mu$F is 300 $\mu$C, then the energy stored in the capacitor is:
When an electron accelerated from rest through a potential difference \( V_1 \) enters a uniform magnetic field, the maximum force on it is F. If the potential difference is changed to \( V_2 \), then the maximum force on the electron in the same magnetic field is 4F, then \( \frac{V_1}{V_2} \) =
A bulb is connected in series with a capacitor to an AC supply. If the capacitance of the capacitor increases, then power of light emitted by the bulb
If the Wheatstone bridge shown in the figure is balanced, then the value of R is
Wheatstone bridge
In the given circuit, if the current through 4 $\Omega$ resistor is zero, then the value of the resistance $R$ is:
current through 4 Ω resistor is zero,
If in Young's double slit experiment, fifth bright fringe is located at a distance of 0.3 mm from the central bright fringe, then the distance of the seventh dark fringe from the central bright fringe is:
If the formation of a real image using a biconvex lens of material of refractive index 1.5 is shown in the figure. If this setup is immersed in water (refractive index = $\frac{4}{3}$), then
formation of a real image using
If four moles of hydrogen and two moles of helium form a gaseous mixture, then the molar specific heat capacity of the mixture at constant pressure is
500 g of water at a temperature of 73 °C is mixed with 45 g of steam at a temperature of 100 °C. The ratio of the initial mass of steam and the mass of steam at equilibrium of the mixture is
Four moles of a diatomic gas at a temperature of 927 $^\circ$C expands adiabatically such that its volume increases by 3100%. The work done by the gas is (Universal gas constant = 8.3 J mol$^{-1}$ K$^{-1}$)
If the coefficient of performance of a refrigerator is 5 and the temperature inside it is -20 °C, then the temperature of its surroundings is
The heat to be supplied to 20 g of oxygen to increase its temperature from 27 $^\circ$C to 59 $^\circ$C at constant pressure is (Universal gas constant = 8.3 J mol$^{-1}$ K$^{-1}$)
If the third harmonic of a closed pipe is in resonance with the fourth harmonic of an open pipe, then the ratio of the lengths of the closed and open pipes is:
If a steel rod of a radius 10 mm and length 80 cm is streched by a force of 66 kN along its length, then the longitudinal stress on the rod is nearly
If the equation representing the relation between displacement 'x' and velocity 'v' of a particle executing simple harmonic motion is $4v^2 = 25 - x^2$, then the time period of the particle is (All the quantities in the equation are in SI units)
If two rain drops of radii $r_1$ and $r_2$ reach the ground with terminal velocities $v_1$ and $v_2$ and linear momenta $p$ and $32p$ respectively, then $r_1 : r_2 =$