List of top Physics Questions asked in Assam Combined Entrance Examination

In the following circuit, the charge stored in capacitors \( C_1 \), \( C_2 \), and \( C_3 \) are
For a system executing simple harmonic motion,
The densities of the nuclei: \(^{24}_{12}Mg\), \(^{40}_{20}Ca\) and \(^{88}_{38}Sr\),
Which of the following is not a representation of uniform motion?
Consider the following spring configurations:
If the first spring is stretched by an amount \( \Delta x \), the second system will be stretched by:
The magnetic properties of magnets are
The total displacement of the object that exhibits the following motion is
Consider a uniformly dense spherical shell of inner radius \( a \) and outer radius \( b \). If \( M \) is the mass of the shell, the moment of inertia of the spherical shell about an axis passing through its center is:
Diffraction of light involves
In the circuit below, A and B represent two inputs and C represents the output. The circuit represents:
A wire of length \( L \) meter carrying current \( i \) ampere is bent in the form of a circle. The magnitude of its magnetic moment in SI units is:
The current I drawn from the 5 volt source will be:
The torque of a force \( \mathbf{F} = 4\hat{i} - 2\hat{j} + 3\hat{k} \) about the origin is \( \mathbf{r} \). The force acts on a particle having position vector \( \hat{i} + 2\hat{j} - \hat{k} \). Then the torque \( \mathbf{r} \) is:
If the angular momentum of a planet of mass \(M\), moving around the sun in a circular orbit, is \(L\). The areal velocity of the planet about the center of the sun is
A particle is moving in a uniform circular motion of radius \( R \) with angular velocity \( \omega \) in the anti-clockwise direction. Another particle is also moving along the same circular path but in the clockwise direction with the same angular velocity \( \omega \). Suppose, both the particles start at \( t = 0 \) from the same point (R, 0) in opposite directions. The minimum time \( t \) after which the velocities of the two particles become orthogonal to each other is:
A particle moves in a circle of radius \( R \). In half the period of revolution its displacement and distance covered respectively are:
The temperature of an ideal gas is increased from 75 K to 300 K. If at 75 K the r.m.s. velocity of the gas molecules is \(v\), at 300 K it becomes:
A point object is placed at a distance of 25 cm from a thin plano-convex lens of focal length 20 cm. The plane surface of the lens is now silvered. The image created by the system is at:
A ray of light passes through four transparent media with refractive index \(n_1, n_2, n_3, n_4\) as shown in the figure. The surfaces of all media are parallel. If the emergent ray ST is parallel to the incident ray PQ, we must have:
The work function of a given metal is 4 eV. The longest wavelength of light that can cause photoelectron emission from this metal is:
A liquid drop of radius \(R = 0.1 \, \text{m}\) having surface tension \(S = \frac{0.01}{4\pi} \, \text{N/m}\) divides itself into \(n\) identical drops. In the process, the total change in the surface energy \(\Delta U = 10^{-4} \, \text{J}\). The value of \(n\) is
The efficiency of a Carnot engine operating between a reservoir and an sink is \( \eta \). If the temperature of the reservoir is increased by 50% and that of the sink is decreased by 50%, the new efficiency will be:
For a straight wire carrying steady current in the vertically upward direction as shown below
A system goes from state a to b along the path abc, when 20 kJ of heat flows into the system and the system does 7.6 kJ of work. If the system is returned back from b to a along the curved path bca due to a work of 5 kJ done on it, then
Two bodies (A and B) of masses 7 kg and 3 kg are attached to each other in the following way. If a force of 100 N is applied on A along the x direction, the force on A on B will be