AP EAPCET 2023 - 15th May Evening Shift

An inductor and a resistor are connected in series to an AC source. If the power factor of the circuit is 0.5 , the ratio of the resistance of the resistor and the reactance of the inductor is

The centripetal acceleration $a$ of an electron in an orbit of hydrogen and the principal quantum number $n$ of the orbit are related by

The radius of the nucleus of an atom whose mass number is 125 is

Two capacitors of capacity $4 \mu \mathrm{~F}$ and $6 \mu \mathrm{~F}$ are connected in series to a 500 V battery. The potential difference across $4 \mu \mathrm{~F}$ capacitor is

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

A block of mass $m$ and charge $q$ is connected to a point owith an inextensible string. This system is on a horizontal table. An electric field $E$ is applied perpendicular to the string and in the plane of the horizontal table. The tensio...

Bandwidth of an optical fibre is

The drift velocity of electrons in a conducting wire connected to a cell is $v_d$. If the length of the wire is doubled and area of cross-section is halved, then the drift velocity of electrons becomes

In the given circuit, if the current flowing through $5 \Omega$ resistor is 0.5 A , then the value of $E$ is

The de-Broglie wavelength of the most energetic photoelectrons emitted from a photosensitive metal of work function $\phi$, when light frequency $v$ incidents on it is $\lambda$. Then, $v=$

A spherical ball of volume $2000 \mathrm{~cm}^3$ is subjected to a hydraulic pressure of 15 atm . If the change in volume is $5 \times 10^{-2} \mathrm{~cm}^3$, the bulk modulus of the material of the spherical ball is
$$ \left(1 \mathrm{~at...

The Lenz's law is associated with

The relation between permittivity of free space, the permeability of free space and speed of light is

The device used to detect infrared radiations is

The net electric flux due to a uniform electric field of $3 \times 10^3 \hat{\mathrm{i}} \mathrm{NC}^{-1}$ through a cube of side 20 cm oriented such that its faces are parallel to the coordinate planes is

The gauge pressure at a depth of 50 m in a sea is (Density of sea water is $1025 \mathrm{~kg} \mathrm{~m}^{-3}$ and $g=10 \mathrm{~ms}^{-2}$ )

The orbital velocity of a body near the surface of a planet $A$ is equal to escape velocity of a body from the planet $B$. If the masses of planets $A$ and $B$ are same, the ratio of their radii is

The emissivity of a perfect black body is increased to 16 times by increasing its temperature. If the initial temperature is $T$, then final temperature of that black body is

The number of rotational degrees of freedom of a monatomic molecule is

The temperature of the sink of a Carnot's engine is 300 K and the efficiency of the engine is 0.25 . If the temperature of the source of the engine is increased by 100 K , the efficiency of the engine increased by

The specific heat capacity of a monatomic gas at constant volume is $x \%$ of its specific heat capacity at constant pressure. Then, $x=$

A monatomic gas of volume $V$ and pressure $p$ expands isothermally to a volume $27 V$ and then compressed adiabatically to a volume $V$. The final pressure of the gas is

A block of mass 5 kg moving on a rough surface with a velocity of $4 \mathrm{~ms}^{-1}$ is stopped by the friction in 2 seconds. Then, the coefficient of friction between the contact surfaces is
(Acceleration due to gravity $=10 \mathrm{~ms...

The following is not the method of reducing friction

Among the following the unit of permeability is NOT represented by

One of the following substances having the tendency to move from stronger region to the weaker region of the magnetic field is

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

The magnetic force $q[\mathbf{v} \times \mathbf{B}]$ is

The magnifying power of a telescope with tube length 60 cm is 5 . Then, the focal length of its eye piece is

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

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

The material used in the fabrication of infrared LED's is

In a transistor, when the emitter current changes by 9.85 mA , the collector current changes to 9.5 mA . Then, the base current is

An object of mass 3 kg is executing simple harmonic motion with an amplitude $\frac{2}{\pi} \mathrm{~m}$. 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 massless spring of constant $8 \pi^2 \mathrm{Nm}^{-1}$. If the block is pulled slightly from its mean position and released, the period of ...

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

In a Young's double slit experiment, if the wavelength of light is increased by 50\% and the distance between the slits is doubled, then the percentage change in fringe width is

A string of length $L$ is stretched by $L / 20$ and the speed of transverse waves along it is $v$. The speed of wave when it is stretched by $L / 10$ will be
(assume that Hooke's law is applicable)

A body of mass 2 kg is moving with a constant acceleration of $(2 \hat{\mathbf{i}}+3 \hat{\mathbf{j}}-\hat{\mathbf{k}}) \mathrm{ms}^{-2}$. If the displacement made by the body is $(3 \hat{\mathbf{i}}-\hat{\mathbf{j}}+2 \hat{\mathbf{k}}) \ma...

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