List of top Physics Questions asked in TS EAMCET

The work done in blowing a soap bubble of diameter 3 cm is (Surface tension of soap solution = 0.035 \( \text{Nm}^{-1} \))

When two light waves of equal intensity superimpose, the maximum intensity obtained is I. If the intensity of one of the waves is quadrupled, then the maximum intensity obtained is

A body X is allowed to fall freely from a height of 125 m from the ground and another body Y is thrown at the same instant vertically upwards with a velocity of $50 ms^{-1}$ from the ground. The relative velocity of the body Y with respect to the body X when they cross each other is

The temperature of a body shown by a faulty Celsius thermometer is 49 °C and by a correct Fahrenheit thermometer is 122 °F. The correction to be applied to the faulty thermometer is

A straight uniform wire of resistance 36 $\Omega$ is bent in the form of a semi-circular loop. The effective resistance between the ends of the diameter of the semi-circular loop is

When a photosensitive material is illuminated by photons of energy 3.1 eV, the stopping potential of the photoelectrons is 1.7 V. When the same photosensitive material is illuminated by photons of energy 2.5 eV, the stopping potential of the photoelectrons is

An electromagnetic radiation of wavelength 331.5 nm is made to strike the surface of a metal. Electrons are emitted with a kinetic energy of \(1.2 \times 10^5\) J mol\(^{-1}\). The work function (in eV) of the metal is (h=\(6.63 \times 10^{-34}\) Js, \(N_A = 6 \times 10^{23}\) mol\(^{-1}\))

If electrons of mass 'm' and de Broglie wavelength '$\lambda$', incident on a metal plate in an X-ray tube, then the minimum wavelength of X-rays emitted is
(h = Planck's constant and c = Speed of light in vacuum)

A person wearing a parachute jumps off a plane from a height of 2 km from the ground and falls freely for 20 m before his parachute opens. After his parachute opens if he continues to move uniformly with the velocity attained due to his freefall, the total time taken by the person to reach the ground is (Acceleration due to gravity = 10 ms$^{-2}$)

If the radiation emitted by a perfect radiator has maximum intensity at a wavelength of 2900 Å, the intensity of radiation emitted by it is (Stefan-Boltzmann's constant = \(5.67 \times 10^{-8}\) Wm\(^{-2}\)K\(^{-4}\) and Wein's constant = \(2.9 \times 10^{-3}\) mK)

The potential difference between points C and D of the electrical circuit shown in the figure is

If the maximum and minimum amplitudes of an amplitude modulated wave are 9 V and 3 V respectively, then the modulation index is

If the breakdown voltage of a Zener diode is 7.2 V and the maximum power dissipated is 216 mW, then the maximum current through the Zener diode is

For a common emitter transistor amplifier, the voltage across the collector resistance is 2.8 V. If the current amplification factor of the transistor is 70 and the collector resistance is 2 k$\Omega$, then the base current is

If the potential energy of an electron in an orbit of hydrogen atom is $-6.80$ eV, then the energy required to ionize the atom is

If the half life of an element is 10 minutes, then the time taken (in minutes) for the element to decay from 20% to 80% is

If mass of 5 neutrons is x, mass of 2 protons is y and the mass of the nucleus $_{10}X^{20}$ is z, then the binding energy of the nucleus X is (Speed of light in vacuum is c)

An electron moving along a straight line with a velocity of $6.4 \times 10^7 ms^{-1}$ is subjected to a magnetic field of 3 mT. If the magnetic field is applied perpendicular to the direction of the initial path of the electron, then the radius of the circular path in which the electron moves under the influence of the magnetic field is (Mass of electron $= 9 \times 10^{-31}$ kg and charge of the electron $= 1.6 \times 10^{-19}$ C)

A straight wire of length 90 cm carrying a current of 3 A is bent in the form of an equilateral triangular loop and is placed in a uniform magnetic field of $8 \times 10^{-4}$ T such that the plane of the loop makes an angle of $30^{\circ}$ with the direction of the magnetic field. The torque acting on the triangular loop is

For a plane electromagnetic wave travelling in free space along X-axis, the magnetic field at a particular point in space is $\vec{B} = 2.1 \times 10^{-8} \hat{k} \, T$. The magnitude of the electric field at this point is

In an LCR series circuit, if $\frac{1}{\omega C}<\omega L$, then the incorrect option among the following is ($\omega$-angular frequency, C-capacitance and L-inductance)

If the current passing through an inductor is increased by 20%, then the percentage increase in the energy stored in the inductor is

If the permeability of a substance is $616 \times 10^{-5} \, NA^{-2}$, then the susceptibility of the substance is

Two points A and B are located at distances 4 cm and 5 cm respectively from a point charge $+20\mu C$. The work done in taking a charge of $+2\mu C$ from point A to point B is

Two point charges $+2\mu C$ and $+8\mu C$ are placed at a distance of 15 cm apart in air. At a point on the line joining these two charges where the net electric field becomes zero, a third charge of $+5\mu C$ is placed. The net electrostatic force acting on $+5\mu C$ charge is