List of top Physics Questions asked in AP EAPCET

A simple pendulum is suspended in a car moving on a circular track of radius \( R \) with a uniform speed of \( \sqrt{1.732 g R} \). The pendulum is making small oscillations in a radial direction about its equilibrium position with a time period \( T \). If the car is at rest, the time period of the pendulum is:
According to Newton's law of cooling, the temperature of a body is \( T \) at time \( t \) and the temperature of the surroundings is \( T_s \). The rate of change of temperature is given by \[ \frac{dT}{dt} = k(T_s - T) \] If the initial temperature at time \( t = 0 \) is \( T_0 \), then the temperature \( T \) is:
A fluid flows through a pipe of diameter 5 cm with a velocity 2 m/s. If the pipe is constricted to a diameter of 3 cm, the velocity of fluid at the constriction is:
An electron moving along positive x-direction with velocity \( 2 \times 10^5 \) ms\(^{-1}\) enters a magnetic field of \( \vec{B} = \hat{i} + 4 \hat{j} + 3 \hat{k} \) T. The magnitude of the force acting on the electron is:
A girl of mass 30 kg stands at one end of a plank of mass 120 kg and length 4 m. Initially the plank lies at rest on a horizontal frictionless surface. If the girl walks to the other end of the plank, the distance that the girl moves relative to the ground is:
A car is moving with a speed of 5 m/s on a circular road having radius of curvature 10 m and coefficient of friction 0.5. For the safe journey of the car, the banking angle of the road should be:
The work done in lifting a body of mass 2 kg from the surface of the earth to a height 10 m is:
The time taken by a net force of 10 N to change the velocity by 4 m/s of a body of mass 10 kg is:
A point \(P\) on the wheel of radius \(R\) is initially in contact with the ground. When the wheel rolls forward half a revolution, the displacement of the point \(P\) is:
The most accurate measurement among the following is:
The driver of a train moving with speed \(V_1\), observes a train moving at distance \(d\) ahead on the same track slowly in the same direction with a speed \(V_2\). The driver applies breaks to give his train a constant retardation \(a\). If there was no collision between the trains, then
A steel ball of radius 0.05 cm and density \( 7.8 \, \text{g/cm}^3 \) is dropped into water. What is its terminal velocity?
(Density of water \( = 1 \, \text{g/cm}^3 \), Viscosity of water \( = 0.001 \, \text{Pas} \))
In a transistor circuit, if emitter and collector connections are interchanged then
A body is thrown vertically upwards with an initial velocity \( u \). If \( g \) is the acceleration due to gravity, then the total time taken for the body to return to the starting point is:
In a hydrogen atom, an electron in an orbit with principal quantum number \( n \) jumps to the first excited state, emitting a photon of wavelength \( \lambda \). Then the value of \( n \) is:
The following is not used as a nuclear fuel.
A radioactive material whose half life period is 2 years weighs 1 g and is stored in the laboratory for 4 years. Then the amount of remaining radioactive material is
To heat the food containing water, the frequency of the microwaves used in microwave oven is:
A resistor of resistance 40 \( \Omega \), a capacitor of capacitive reactance 20 \( \Omega \) and an inductor of inductive reactance 50 \( \Omega \) are connected in series to an ac source of 100 V. The current through the circuit is:
The threshold wavelength of a photosensitive material is equal to the frequency of H$_\alpha$ line of hydrogen. If a photon whose frequency equal to the frequency of H$_\beta$ line of hydrogen is incident on this photosensitive material, the maximum kinetic energy of the emitted photoelectrons is: (R -- Rydberg's constant, h -- Planck's constant and c -- speed of light in vacuum)
The self-inductance of a long solenoid of cross-sectional area \( A \), length \( l \) and \( n \) turns per unit length is given by:
Eight drops of mercury, each of the same radius and same charge, combine to form a bigger drop. The ratio of the capacitance of the bigger drop to that of each smaller drop is:
The given circuit shows two capacitors connected to a battery. After the capacitors are completely charged, the battery is removed and the capacitors are connected with plates of opposite polarity together. Then the energy lost in the process is:
two capacitors connected to a battery
A cyclotron’s oscillator frequency is 20 MHz. The operating magnetic field for accelerating protons is
(Charge of proton = \( 1.6 \times 10^{-19} \) C, mass of proton = \( 1.67 \times 10^{-27} \) kg)
A straight wire carrying a current of 12 A is bent into a semi-circular arc of radius 2 cm as shown in the figure. Then the magnetic field due to the straight segments at the centre of the arc is
A straight wire carrying a current of 12 A