List of top Physics Questions asked in AMUEEE

A thermodynamic state of a given sample of an ideal gas is completely described, if its

A microscope is focused on a coin lying at the bottom of a beaker. The microscope is now raised up by $1 cm$. To what depth should the water be poured into the beaker so that coin is again in focus? (Refractive index of water is $\frac{4}{3}$ )

A glass plate of refractive index $1.5$ is coated with a thin layer of thickness t and refractive index $1.8$. Light of wavelength $648 \,nm$ travelling in air is incident normally on the layer. It is partly reflected at upper and lower surfaces of the layer and the two reflected rays interfere. The least value of $t$ for which the rays interfere constructively is

A cyclotron is operated at an oscillator frequency of $12\, MHz$ and has a dee radius $R = 50\,cm$ . What is the magnitude of the magnetic field needed for a proton to be accelerated in the cyclotron ?

A $40\, kg$ slab rests on a frictionless floor. A $10\, kg$ block rests on top of the slab (as shown in the figure). The coefficient of static friction $\mu_{s}$ between the block and the slab is $0.60$, whereas their kinetic friction coefficient $\mu_{k}$ is $0.40$. The $10 \,kg$ block is pulled by a horizontal force $(100.0\, N) \hat{i}$. The resulting accelerations of the block and slab will be $\left(\right.$ Take $\left.g=10 \,m / s ^{2}\right)$

An organ pipe $A$, with both ends open, has fundamental frequency $300\, Hz$. The third harmonic of another organ pipe $B$, with one end open, has the same frequency as the second harmonic of pipe $A$. The lengths of pipe $A$ and $B$ are (speed of sound in air = $343\, m/s)$

The transverse displacement of a string fixed at both ends is given by $y=0.6 \sin \left(\frac{2 \pi x}{3}\right) \cos (120 \pi t)$ where $x$ and $y$ are in metres and $t$ is in seconds. The length of the string is $1.5\, m$ and its mass is $3.0 \times 10^{-2} kg$. The tension in the string is equal to

A wheel turning with angular speed of 30 rev/s is brought to rest with a constant acceleration. It turns 60 rev before it stops, the time that elapses before it stop, is

The rotor�s velocity of a helicopter engine changes from $330 \,rev/min$ to $110 \,rev/min$ in 2 minutes. How long does the rotor blades take to stop?

A battery of emf $8V$ with internal resistance $0.5 \, \Omega$ is being charged by a $120 \,V\, d.c.$ supply using a series resistance of $15.5 \Omega$ . The terminal voltage of the battery is

Two point charges $+ 10^{-7} C$ and $- 10^{-7} C$ are placed at $A$ and $B, 20 \,cm$ apart as shown in the figure. Calculate the electric field at $C, \,20\, cm$ apart form both $A$ and $B$ .

The position-time graph of a particle of mass $4 \,kg$ is shown in the figure. Calculate the impulse (in $MKS$ units) at time $t = 0$ and $t = 6 \,seconds$ respectively

In a Bipolar Junction Transistor $(BJT)$ , the current gain $\beta$ is defined is

Calculate the highest frequency of the emitted photon in the Paschen series of spectral lines of the hydrogen atom

Calculate the acceleration due to gravity on the surface of a pulsar of mass $M = 1.98 \times 10^{30}\, kg$ and radius $R = 12 \,km$ rotating with time period $T = 0.041 \,s. (G = 6.67 \times 10^{-11}MKS)$

Calculate the neutron separation energy from the following data: $m (^{40}_{20} Ca) = 39.962591\,u$ , $m (^{41}_{20} Ca) = 40.962278\,u$ , $m_n = 1.00865, \,1u = 931.5\,Me V/c^2$

An object is placed at a distance of $10\, cm$ from co-axial combination of two lenses $A$ and $B$ contact. The combination forms a real image three times the size of the object. If lens $B$ concave with a focal length of $30\,cm$. The nature and focal length of lens $A$ is

Alpha particles of kinetic energy $7.7 \,MeV$ are being scattered by the nucleus of gold which has $79$ electrons. The distance of closest approach of the alpha particles is (Take $\frac{1}{4\,\pi\, \varepsilon_{0} = 9 \times 10^{9} \, MKS} )$

A planar coil having $12$ turns carries $15\, A$ current. The coil is oriented with respect to the uniform magnetic field $\vec{B}=0.2\, \hat{i} T$ such that its directed area is $\vec{A}=-0.04\, \hat{i} m ^{2}$ . The potential energy of the coil in the given orientation is

A particle moves in a circular orbit of radius $r$ under a central attractive force $F=-\frac{k}{r},k$ is constant. The time period of its motion shall be proportional to

A new unit of length is chosen such that the speed of light in vacuum is unity. What is the distance between the sun and the earth in terms of the new unit if light takes 8 min and 20 s to cover this distance?

A sphere $P$ of mass m and velocity $\vec{v_i}$- undergoes an oblique and perfectly elastic collision with an identical sphere $Q$ initially at rest. The angle $\theta$ between the velocities of the spheres after the collision shall be

The total torque about pivot $A$ provided by the forces shown in the figure, for $0L = 3.0\, m$, is

A particle in a certain conservative force field has a potential energy given by $V = \frac{20xy}{z}$. The force exerted on it is

A body of mass $0.4\, kg$ starting at origin at $t = 0$ with a speed of $10 \,m \s$ in the positive $x$-axis direction is subjected to a constant $F = 8\, N$ towards negative $x$-axis The position of the body after $25\, s$ is