List of top Physics Questions asked in AMUEEE

Consider an optical system consisting of a concave mirror $ M_1 $ and convex mirror $ M_2 $ of radii of curvature $ 60 \,cm $ and $ 20\, cm $ , respectively. Two mirrors are separated by a distance of $ 40\, cm $ . An object $ O $ is placed at a distance $ 80\, cm $ from $ P $ . The final image is formed at a distance

The density of a newly discovered planet is twice that of earth. The acceleration due to gravity at the surface of the planet is equal to that at the surface of the earth. If the radius of the earth is $R$, the radius of the planet would be

Three particles $ P, Q $ and $ R $ are at rest at the vertices of an equilateral triangle of side $ s $ . Each of the particles starts moving with constant speed $ v \,ms^{-1}. P $ is moving along $ PQ, Q $ along $ QR $ and $ R $ along $ RP $ . The particles will meet each other at time $ t $ given by

Three resistances $P, Q, R$ each of $2\, \Omega$ and an unknown resistance $S$ form the four arms of a Wheatstone bridge circuit. When a resistance of $6\, \Omega$ is connected in parallel to $S$ the bridge gets balanced. What is the value of $S$ ?

Work done in increasing the size of a soap bubble from a radius of $ 3 \,cm $ to $ 5 \,cm $ is nearly (surface tension of soap solution $ = 0.03\, Nm^{-1} $ ).

Two wires of equal cross section, but one made up of steel and the other copper are joined end to end. When the combination is kept under tension, the elongations in the two wires are found to be equal. If (Y for steel = $2.0\times 10^{11}\,Nm^{-2}$ and $Y for copper = 1.1 \times 10^{11}\,Nm^{-2}$, the ratio of the lengths of the two wires is

An ion with a charge of $ + 32 \times 10^{-19}C $ is in a region where a uniform electric field of $ 5 \times 10^4\, V/m $ is perpendicular to a uniform magnetic field of $ 0.8 \,T $ . If its acceleration is zero, then its speed must be

An ideal gas at pressure $ P $ is adiabatically compressed so that its density becomes $ n $ times the initial value. The final pressure of the gas will be $ \left(\gamma = \frac{C_{P}}{C_{V}}\right) $

A quantity of a substance in a closed system is made to undergo a reversible process from an initial volume of $ 3 \,m^3 $ and initial pressure $ 10^5\, N/m^2 $ to a final volume of $ 5\, m^3 $ . If the pressure is proportional to the square of the volume (i.e. $ p = AV^2 $ ), the work done by the substance will be

Starting from origin, a body moves along $ x $ -axis. Its velocity at any time is given by $ v = 4t^3 - 2t \,m/s $ Acceleration of the particle when it is $ 2 \,m $ away from the origin is

The displacement $ x $ of a body varies with time as $ x = -\frac{1}{3} t^2 + 16 t +2 $ , where $ x $ is in metres and $t$ is in seconds. The time taken by the body to come to rest is

The expression of the trajectory of a projectile is given as $ y = px - qx^2 $ , where $ y $ and $ x $ are respectively the vertical and horizontal displacements and $ p $ and $ q $ are constants. The time of flight of the projectile is

A drunkard walking in a narrow lane takes $ 5 $ steps forward and $ 3 $ steps backward followed again by $ 5 $ steps forward and $ 3 $ steps backward and so on. Each step is lm long and requires Is. Determine how long the drunkard takes to fall in a pit $ 13 \,m $ away from the starting point?

A rocket is launched vertically upward from the surface of the earth with an initial velocity of $ 10 \,km/s $ . If the radius of the earth is $ 6400 \,km $ and atmospheric resistance is negligible. Find the distance above the surface of the earth that the rocket will go.

A wire when connected to $220\, V$ mains supply has power dissipation $P_1$. Now the wire is cut into two equal pieces which are connected in parallel to the same supply. Power dissipation in this case is $P_2 \, then \, P_2 : P_1$ is

A charge $Q$ is to be divided on two objects. The values of the charges on the objects so that the force between the objects can be maximum are

An oil drop of $ n $ excess electrons is held stationary under a constant electric field $E$ in Millikan?s oil drop experiment. The density of oil is $ \rho $ . The radius of the drop is

A proton is released from rest in a uniform electric field of magnitude $8.0\times 10^{4}\, V/m$, directed along positive $x$-axis. The proton undergoes a displacement of $0.30\,m$ in the direction of the field. What is the change in electric potential of the proton as a result of this displacement?

Two spheres of the same material have radii $ 1 \,m $ and $ 4\, m $ and temperatures $ 4000\, K $ and $ 2000\, K $ respectively., The ratio of energy radiated per second by the first sphere to the second is

Two identical cylindrical vessels with their bases at the same level, each contains a liquid of density $ 13 \times 10^3 \,kg/m^3 $ . The area of each base is $ 4.00\, cm^2 $ , but in one vessel, the liquid height is $ 0.854 \,m $ and in the other it is $ 1.560\, m $ . Find the work done by the gravitational force in equalizing the levels when the two vessels are connected.

The net resistance of an ammeter should be small to ensure that

The electric field in a region is given by $\overrightarrow {E} = \left(\frac{A}{x^{3}}\right) \hat{i} $ An expression for the potential in the region assuming the potential at infinity to be zero is

The displacement of an object attached to a spring and executing simple harmonic motion is given $ byx = 2 \times 10^{-2} cos\,\pi t $ metre. The time at which the maximum speed first occurs is

The depletion layer in the $p-n$ junction region is caused by

Suppose the first strip $A$ is red, second strip $B$ is yellow, third strip $C$ is orange and fourth strip $R$ is silver, from left to right, in a colour coded carbon resistor. What is the value of resistance?