List of top Physics Questions asked in AP EAPCET

A wire is first bent in the form of a circular coil of 5 turns and the same wire is then bent in the form of another circular coil of 10 turns. If same current is passed in both the coils, then the ratio of the magnetic fields at their centres is

A solenoid has a core of a material with relative permeability 400. The windings of the solenoid are insulated from the core and carry a current of 4 A. If the number of turns is 500 per metre, then the magnetizing field is:

In an ac generator, if a coil of \( N \) turns and area \( A \) is rotated at \( \nu \) revolutions per second in a uniform magnetic field \( B \), then the motional emf produced is equal to \[ (t = 0 s, the coil is perpendicular to the field) \]

The frequency of ac at which 16 \(\mu F\) capacitor and \( \frac{10}{\pi} \) mH inductor will have same reactance is:

The average power output of a point source of an electromagnetic radiation is 1080 W. The maximum value of the rms value of the electric field at a distance of 3 m from the source is

The velocity of a particle A is 3 times the velocity of proton. If the ratio of the de Broglie wavelengths of the particle A and the proton is 3:2, the mass of the particle A is:

The transition of an electron in hydrogen atom that emits a photon whose wavelength lies in the ultraviolet region of the electromagnetic spectrum is

The relation between the mean life time \( \tau \) and the half life time \( T_{1/2} \) of a radioactive substance is:

A p-n junction diode is reverse biased with a voltage of 8 V. If the resistance of the diode is \( 4 \times 10^7 \, \Omega \), then the reverse saturation current is

In a p-n-p transistor,

A carrier wave of peak voltage 15 V is used to transmit a message signal. If the modulation index is 60%, then the peak voltage of the modulating signal is

Vijayawada FM radio station broadcasts at frequency of 103.4 MHz. The wavelength of the corresponding radio waves (in m) is

Among the following, the unit of permeability is NOT represented by

A truck moving with a constant velocity \( 12 \, \text{ms}^{-1} \) crosses a car moving from rest with uniform acceleration \( 2 \, \text{ms}^{-2} \). The distance the car has to travel from the starting point to cross the truck again is:

If \( \mathbf{F} = (4\hat{i} - 10\hat{j}) \, \text{N} \) and \( \mathbf{r} = (-5\hat{i} - 3\hat{j}) \, \text{m} \), then \( \mathbf{r} \times \mathbf{F} \) is:

Two forces whose magnitudes are in the ratio 5:3 are acting at a point at an angle of \( 60^\circ \) simultaneously. If the resultant of the two forces is 35 N, then the magnitudes of two forces respectively are:

A block of mass 5 kg moving on a rough surface with a velocity of 4 ms\(^{-1}\) is stopped by the friction in 2 seconds. Then the coefficient of friction between the contact surfaces is:

The following is not the method of reducing friction:

A body of mass 2 kg is moving with a constant acceleration of \( \left( 2\hat{i} + 3\hat{j} - \hat{k} \right) \, \text{ms}^{-2} \). If the displacement made by the body is \( \left( 3\hat{i} - \hat{j} + 2\hat{k} \right) \, \text{m} \), then the work done is:

In the case of non-conservative forces, the following statement is correct:

Two particles of masses 5 g and 3 g are separated by a distance of 40 cm. The centre of mass of the system of these two particles lies:

The angular speed of a rigid body rotating about a fixed axis is \( (8-2t) \) rad s\(^{-1}\). The angle through which the body rotates before it comes to rest is:

An object of mass 3 kg is executing simple harmonic motion with an amplitude of \( \frac{2}{\pi} \, \text{m} \). If the kinetic energy of the object when it crosses the mean position is 6 J, the time period of oscillation of the object is:

As shown in the figure, a block of weight 20 N is connected to the top of a smooth inclined plane by a massless spring of constant \( 8\pi \, \text{Nm}^{-1} \). If the block is pulled slightly from its mean position and released, the period of oscillations is: