List of top Physics Questions asked in AP EAPCET

A circular film of a liquid has an area of 10 cm$^2$. If the work done in making its radius two times the initial radius is $8 \times 10^{-3$ J, the surface tension of the liquid is $\left(1+\frac{1}{a}\right)$ Nm$^{-1}$. The value of $a$ is}

Two wooden blocks of mass M\(_1\) and M\(_2\) rest on a frictionless table. A bullet of mass m is fired at M\(_1\) with speed v which embedded in it and the two together finally collide with M\(_2\). Find the velocity of M\(_2\) after collision. [Ignore any energy loss and treat the problem to be one dimensional]

Assertion (A): In S.H.M kinetic and potential energy become equal when the distance is $\frac{1}{\sqrt{2}}$ times its amplitude. Reason (R): The potential energy of a particle executing S.H.M is periodic with time period being maximum at the extreme displacement.

An object of mass 20 kg. is displayed by \(x = 5t^2\) m (here t is time) by the application of a force. Then the ratio of the work done in times 3 s and 5 s is

A uniform rod of length 60 cm is placed with one end in contact with the horizontal table and is then inclined at an angle 30\(^\circ\) to the horizontal and allowed to fall. The angular velocity of the rod when it becomes horizontal is (acceleration due to gravity = 10 ms\(^{-2}\))

A wheel undergoes a constant acceleration starting form rest at t = 0. The angular velocity of the wheel is 3.14 \(\frac{\text{rad}}{\text{sec}}\) when t = 2 s. The accelerator is abruptly ceased at t = 20 s. The number of revolutions, wheel makes in the interval t = 0 to t = 40 s is

As shown in the figure, two spherical cavities are made in the uniform solid sphere of radius R. The boundaries of the cavities touch at the centre of the sphere. The centers of the cavities and the sphere lie on the x-axis. The mass of the solid sphere before the cavities were created was M. The gravitational force on a point mass m at a distance 'd' away from the center of the solid sphere is

Which of the following is true about the coefficient of static friction (\(\mu_s\)) and the coefficient of kinetic friction (\(\mu_k\))

A box of mass 2 kg is placed on a inclined plane that makes 30\(^\circ\) with the horizontal. The coefficient of friction between the box and inclined plane is 0.2. A force F is applied on the box perpendicular to the incline to prevent the box from sliding down. The minimum value of F is (acceleration due to gravity = 10 m s\(^{-2}\))

A physical quantity P is related to four observables a, b, c, and d as \( P = \frac{\sqrt{ab}.d^\alpha}{\sqrt{C}} \) (\(\alpha\) is constant). The percentage errors in a, b, c and d are 0.5% in each. If the percentage error in P is 2%, then \(\alpha\) is

A car is moving along a straight line is brought to a stop within a distance of 200 m and in time 10 s. The initial speed of the car is

A ball is thrown upward from the top of a building at an angle of 30\(^\circ\) to the horizontal and with an initial speed of 20 m s\(^{-1}\). If the ball strikes the ground after 3 s, then the height of the building is (acceleration due to gravity = 10 ms\(^{-2}\))

A particle is moving on a circular path with a constant speed v. It's change of velocity as it moves from A to B in the figure is

An ancient artifact retains 75% of its original carbon-14. Given $ T_{1/2} = 5730 \, \text{years} $, and $ \ln(0.5) = -0.7 $, $ \ln(0.75) = -0.3 $, find the age of the sample.

Frequencies in the UHF range normally propagate by means of:

A circular loop of wire of radius $ 14\, \text{cm} $ is placed in a magnetic field directed perpendicular to the plane of the loop. If the field decreases steadily at a rate of $ 0.05\, \text{T/s} $, what is the magnitude of the induced emf in the loop?

The magnetic field in a plane electromagnetic wave is given by: $$ \vec{B} = (3 \times 10^{-7}) \sin(3 \times 10^4 x + 9 \times 10^{12} t) \hat{j} $$ What is the corresponding electric field $ \vec{E} $ of the wave?

An RLC series circuit has:
- Resistance $ R = 150\, \Omega $
- Capacitance $ C = 20\, \mu\text{F} $
- Inductance $ L = 500\, \text{mH} $
- AC voltage $ V = 100\, \text{V} $
- Angular frequency $ \omega = 400\, \text{rad/s} $
Find the phase angle $ \phi $ between current and voltage.

Which of the following statements is correct regarding the photoelectric effect?

In Young’s double slit experiment, slits are $ 3\, \text{mm} $ apart and illuminated with light of $ 3750\, \text{Å} $ and $ 7500\, \text{Å} $. Screen is placed $ 4\, \text{m} $ away. What is the minimum distance from the central fringe where bright fringes from both patterns coincide?

Choose the correct statement regarding nuclear properties:

An electron with kinetic energy $ 100\, \text{eV} $ moves in a circular path of radius $ 10\, \text{cm} $ in a magnetic field. Find the approximate magnitude of the magnetic field $ B $.
[Given: mass of electron = $ 0.5\, \text{MeV}/c^2 $]

A particle of mass $ 2.2 \times 10^{-30}\, \text{kg} $ and charge $ 1.6 \times 10^{-19}\, \text{C} $ is moving at $ 10\, \text{km/s} $ in a circular path of radius $ 2.8\, \text{cm} $ inside a solenoid. The solenoid has $ 25\, \text{turns/cm} $, and the magnetic field is perpendicular to the plane of the particle’s path. The current in the solenoid is:
($ \mu_0 = 4\pi \times 10^{-7}\, \text{H/m} $)