List of top Physics Questions

The dispersion relation for electromagnetic waves travelling in a plasma is given by \(ω^2 = c^2k^2-ω^2_ρ\), where c and \(ω_ρ\), are constants. In this plasma, group velocity will be
What is the relation between half life (T) and decay constant (\(λ\)) of a radioactive element?
For a fixed voltage, the current flowing through a conductor will increase when it's____
Coefficient of volume change (mv) is given by -
Where av is coefficient of compressibility and Co is initial void ratio corresponding to the initial pressure.
Give below are two statements:
Statement - I : The pressure on the base of a liquid column will depend upon the shape of the column.
Statement - II: The pressure over the free surface of a fluid at rest will vary with the location.
In the light of the above statements, choose the correct answer from the options given below :
What would be the approximate kinetic energy of a piece of rock, weighing 1 kg, just before it hits the earth's surface from a height of 20 meters ?
What is the kinetic energy of an electron in the lowest energy level of a hydrogen atom?
The two lines AB and CD shown in h-s curve are, respectively:
Given below are two statements:
Statement I: Kinetic energy of the wind is proportional to (velocity).
Statement II: Kinetic energy of the wind is proportional to area of sweep of wind turbine and also on Air density.
In the light of the above statements, choose the most appropriate answer from the options given below:
A truss ABC loaded at B with a force of 10 kN as shown in the figure. The force in the member AC is:
Given below are two statements:
Statement - I: The formula of correct length is \(\frac{\text{Measure of length}}{\text{Nominal length of Tape}}\) × Actual length of tape.
Statement - II: The formula of sag correction is - \(\frac{-W^2}{24P^2}\times L\).
In the light of the above statements, choose the correct answer from the options given below :
The SI system has seven basic units and these units pertain to the seven fundamental scientific quantities which one is not in the list of seven SI units-
Given below are two Statement:
Statement I: Speed is a vector quantity
Statement II: Velocity is a scalar quantity
In the light of the above statements, choose the correct answer from the options given below:
Given below are two statements:
Statement I: Accuracy is the degree of agreement between the measured value and the accepted true value of the given parameter.
Statement II: Determinate error are random in nature and occur when something went wrong during the measurement.
In the light of the above Statements, choose the correct answer from the options given below:
A scale of 1 inch = 50 ft is mentioned on an old map. What is the corresponding equivalent scale?
The arithmetical check for Height of Instrument method (HI) is -
Given \(\overrightarrow A\)x \(\overrightarrow B\) = \(\overrightarrow C\),
Where \(\overrightarrow A = x\hat i+y\hat j+3\hat k\), \(\overrightarrow B = y\hat î + x\hat j + 2\hat k\), \(\overrightarrow C=-5\hat î+5\hat k\) 
Find the value of x and y
Choose the incorrect statement about Atomic absorption spectrometer:
Theory of errors and adjustments deals with minimizing the effects of.
The moment of the couple formed by the forces \(5\hat{i}+\hat{k}\) and \(-5\hat{i}-\hat{k}\) acting at the points (9, -1, 2) and (3, -2, 1) respectively, is
If three forces acting on a rigid body are in equilibrium, then they must:
Soap bubble attains spherical shape due to
If the wind speed at a site is 6 m/s for half of the year and 10 m/s for the rest of the year calculate the energy content in a year.
Human ear normally hears sounds originating from the vibrating objects with a frequency between
A metal has work function \(w_0\) = 3.3×10-19 J. What should be the minimum frequency of the incident radiation that can remove an electron from the metal surface? [Given h = 6.6x10-34 J-s]