List of top Questions asked in KEAM- 2025

A conductor with an air core cavity inside, is charged to attain the surface charge density of \(\sigma\). If E is the magnitude of electric field and V is the potential, then inside the cavity

The frequency of the periodic wave for the following figure is 


 

The product of uncertainty in position \((\Delta x)\) and uncertainty in velocity \((\Delta v)\) has the unit of
In the following reaction, the change in oxidation state of Magnesium is: 3Mg(s) + N2(g) → Mg3N2(s)
If the volume of nucleus having mass number 2 is V, then that for the nucleus having mass number 8 is
If a diode is forward biased, then the
The process that releases neutrons from the nucleus is
If the threshold wavelength of a photoelectric material lies in the green light region, then which one of the following light will not emit photoelectrons?
The simple microscope having a lens of focal length 5 cm gives the magnification of (least distance of distinct vision \(= 25\) cm)
Monochromatic ray of light incident on a glass prism does not produce the phenomenon of
If a current of 1 A is passed through a 1 m long solenoid of 7000 turns, the magnetic field produced at the middle of the solenoid is
The magnetic field at the centre of a current loop of radius \(r\) carrying a current \(I\) is
The energy dissipated per unit time by a wire of resistance \(2R\) connected to a battery of voltage \(2V\) is
The a.c circuit exhibiting the phenomenon of resonance has/have the circuit element(s)
The vibrations of atoms and molecules produce electromagnetic radiation in the region of
The electrostatic force between two point charges at a distance of separation \(d\) is \(F\). If one of the charge is moved away by a distance \(d/2\) then the force between them is
Which one of the following molecules is nonpolar?
A steel rod of length 1 m is clamped at its middle. If the fundamental frequency of vibrations is 3 kHz, then the speed of sound in steel is
For a diatomic gas molecule the value of \(C_p\) in \(J mol^{-1} K^{-1}\) is \((R = 8.2 J mol^{-1} K^{-1})\)
The resistance of a wire of length \(l\) and cross sectional area \(A\) is \(R\). The resistance of another wire of the same material of length \(3l\) and cross sectional area \(\frac{A}{3}\) is
Young's modulus and shear modulus can be defined only in
The speed of water flowing out from the small opening at a depth of \(h\) from the surface of water in a large tank is
The line that joins any planet to the sun sweeps out equal areas in equal intervals of time. This statement is
The CORRECT statement for a rigid body rotating about a fixed axis with angular velocity \(\omega\) is
If the moment of inertia of a circular disc about its central axis is I, then that for the same disc about its diameter is