List of top Physics Questions

The electric field just outside a charged conductor is E. The electric field just inside the conductor is:
For the differential equation \(\left(1+\frac{d^2y}{dx^2}\right)^{3/2} = y\frac{d^2y}{dx^2}\) the order, degree and linearity respectively are:
A skater is using very low-friction rollerblades. A friend throws a Frisbee straight at her. In which case does the Frisbee impart the greatest impulse to the skater:
The first maxima for Bragg's diffraction pattern by a crystal is observed at 30\(^{\circ}\) when X-rays wavelength of 0.32 nm are used. The distance between the atomic planes is:

Match the LIST-I with LIST-II

LIST-I (Type of decay in Radioactivity)LIST-II (Reason for stability)
A.Alpha decayIII.Nucleus is mostly heavier than Pb (Z=82)
B.Beta negative decayIV.Nucleus has too many neutrons relative to the number of protons
C.Gamma decayI.Nucleus has excess energy in an excited state
D.Positron EmissionII.Nucleus has too many protons relative to the number of neutrons


Choose the correct answer from the options given below:

Two thin convex lenses of focal lengths 2 cm and 6 cm are separated by a distance of 4 cm in air. Arrange the following cardinal points in ascending order on basis of their distance from second lens:
A. First Principal Point
B. First Focal Point
C. Second Focal Point
D. Second Nodal Point
The Schrodinger wave equation is:
A conducting sphere of radius R carries a total charge Q. The electric field at a distance r>R from the center is:
If \(\vec{A}=\vec{\nabla}\phi\) and \(\phi = xy+yz+zx\), then the true statements are:
A. \(\vec{\nabla}\cdot\vec{A}=0\)
B. \(\vec{\nabla}\cdot\vec{A}\neq0\)
C. \(\vec{\nabla}\times\vec{A}=\vec{0}\)
D. \(\vec{\nabla}\times\vec{A}\neq\vec{0}\)
Choose the correct answer from the option given below:
The place at which plane of vibration of Foucault's pendulum does not rotate at all, is:
If the torque remains constant while the angle changes, the work done is equal to:
For an even function, the Fourier coefficients are:
A. \(a_0 \neq 0\)
B. \(a_n \neq 0\)
C. \(a_n = 0\)
D. \(b_n = 0\)
Choose the correct answer from the options given below:
A parallel-plate capacitor has a dielectric slab of thickness d and dielectric constant K inserted between the plates. The capacitance change compared to the vacuum case (when no slab is inserted) is:
Consider the following statements about light:
A. photoelectric effect exhibits wave nature of light.
B. Compton effect exhibits wave nature of light.
C. photoelectric effect exhibits particle nature of light.
D. Compton effect exhibits particle nature of light.
Choose the CORRECT answer from the options given below:
If an electromagnetic wave is totally reflected, the radiation pressure in terms of average Poynting vector S\(_{av}\) is:
The gravitational field at a point in space is:
The electric potential inside a charged conducting sphere is constant. The charge distribution inside the sphere will be:

Match the LIST-I with LIST-II

LIST-I (Energy of a particle in a box of length L)LIST-II (Degeneracy of the states)
A.\( \frac{14h^2}{8mL^2} \)I.1
B.\( \frac{11h^2}{8mL^2} \)II.3
C.\( \frac{3h^2}{8mL^2} \)III.6


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The stopping potential for a fast moving photo-electron is independent of:
Moment of inertia of a solid cone about its vertical axis is:
Which of the following conditions will lead to Anomalous dispersion?
A tuning fork of unknown frequency sounded with a tuning fork of frequency 256 Hz produces 4 beats per second. If a small quantity of wax is fixed on first fork so that it produces 3 beats per second with tuning fork, what will be the frequency of first fork (in Hz)?
In Compton scattering, Compton shift equals Compton wavelength if angle of scattering is:
According to the Dulong and Petit's law, the atomic heat of an element at constant volume:
In the context of conductors in electrostatic equilibrium, the relationship between electric field and the conductor's surface is: