List of top Physics Questions asked in AP EAPCET

A circuit containing inductance of $\frac{1}{6\pi}$H and a resistance of 15 $\Omega$ in series. If an AC voltage of 100 V and 60 Hz is applied to above circuit, then the current in the circuit and phase difference between voltage and current respectively are

A particle of mass $1 \times 10^{-30}$ kg and electric charge $1.6 \times 10^{-19}$ C has de-Broglie wavelength 660 nm. Then kinetic energy of this particle is (Planck's constant, h = $6.6 \times 10^{-34}$ J-s)

A pure semiconductor crystal has $8 \times 10^{28} \frac{\text{atoms}}{\text{m}^3}$. It is doped by 2 ppm concentration of pentavalent atoms. The number of holes formed in the semiconductor crystal is (Intrinsic carrier concentration, $n_i = 1 \times 10^{16} \text{ m}^{-3}$)

The minimum size of an antenna for transmitting electromagnetic waves at 1500 MHz is

Work function (W$_o$) values of six metals (in eV) are given below: Li \quad Mg \quad Cu \quad Ag \quad K \quad Na 2.42 \quad 3.7 \quad 4.8 \quad 4.3 \quad 2.25 \quad 2.3 How many of the above metals do not eject the electrons when they are made to strike with radiation of wavelength 400 nm? (h=$6.62 \times 10^{-34}$ Js)

The work function of a metal M is 6.3 eV. The wave length of the incident radiation required to just eject the electrons from its surface (in nm) is

A radioactive element of mass 1 kg after N years is left with only 125 g. If the half life of the element is 12.5 y, then the value of N is

For the logic gates shown below, the correct output is

In a plane electromagnetic wave, $U_E$ and $U_B$ are average energy densities of electric field and magnetic field respectively, then the correct option in the following is

Light of wavelength 1 nm belongs to the following class of waves

An observer at rest experiences an electric field due to a static charge. Later he starts moving away from it then the observer experiences.

Assertion (A): When a circular coil, placed in a region with its plane parallel to a magnetic field, expands radially outwards, no emf is induced in it. Reason (R): There is a constant magnet field in the perpendicular (to the plane of the coil) direction.

An infinitely long wire carrying 1 A current in the +Z direction is placed at (1 cm, 1 cm). Another wire carrying 1 A in +X direction is placed at y = 1 cm. If the magnetic field due to this configuration at the origin is $\vec{B$. Let $B_0$ be the magnitude of the field if only the wire at (1 cm, 1 cm) was present, then $\frac{\vec{B}}{B_0}$ is}

Two cells A and B are connected in the secondary circuit of a potentiometer one at a time and the balancing lengths are respectively 360 cm and 420 cm. If emf of A is 2.4 V, the emf of the second cell B is

A 8 $\Omega$ resistor is connected to a battery that has an internal resistance of 0.2 $\Omega$. If the voltage across the battery (the terminal voltage) is 10 V, then the emf of the battery is

A vessel contains 3 moles of He, 1 mole of Ar, 5 moles of N$_2$ and 3 moles of H$_2$. If the vibrational modes are ignored, the total internal energy of the system of gases is

25 capacitors each of capacitance 1 $\mu$F are connected in series to a battery of 100 V. The total charge stored on capacitors is

An optician prescribes a corrective lens of power +2D, then the focal length of the required convex lens is

A monochromatic light of wavelength 6000 \AA \ coming from a star is detected in a 100 inch telescope. The limit of resolution of the telescope is approximately

A steel wire of length 1.25 m is stretched between two rigid supports. The tension in the wire produces an elastic strain of 0.14%. The fundamental frequency of the wire is (Density and Young's modulus of steel are $7.7 \times 10^3$ kgm$^{-3}$ and $2.2 \times 10^{11}$ Nm$^{-2}$ respectively)

The magnetic field due to current carrying circular loop of radius 6 cm at a point on the axis at a distance of 8 cm from centre is 27 $\mu$T. The magnetic field at the centre of the current carrying loop is.

A monatomic gas ($\gamma = \frac{5}{3}$) at a pressure of 4 atm is compressed adiabatically so that its temperature rises from 27 $^\circ$C to 327 $^\circ$C. The pressure of the gas in its final state is

A gas at 37 $^\circ$C is compressed adiabatically to half of its volume, then the final temperature of the gas is (Ratio of specific heat capacities of the gas is 1.5)

A cylindrical tank having large diameter is filled with water to a height H. A hole of cross-sectional area 5 cm$^2$ in the tank allows water to drain out. If the water drains out at the rate of $2 \times 10^{-3$ m$^3$s$^{-1}$, then the value of H is} (acceleration due to gravity = $10$ ms$^{-2}$)

One end of the steel rod is clamped to the roof and the other end is attached to a mass of 1000 kg as shown in the figure. The length of the rod is 50 cm and its cross-sectional area is 1000 mm$^2$. The change in the length of the rod due to the weight of the mass is \underline{\hspace{2cm}} .