List of top Physics Questions

The acceleration of a particle varies with time as \( a = 6t \). What is the displacement and velocity of the particle at \( t = 4s \)?
What is the dimension of \[ \frac{M B}{K T} \] where \( M \) represents magnetic moment, \( K \) represents the Boltzmann constant, \( B \) represents the magnetic field, and \( T \) represents temperature?
Water flows through a pipe with velocity \( V_1 = 3 \, \text{m/s} \) where the area of the pipe is \( A_1 \). What is the velocity \( V_2 \), where the diameter of the pipe is half of that at area \( A_1 \)?
If force is 500 N and instantaneous velocity is 20 m/s, what is the instantaneous power?
A cylindrical vessel contains 16 kg at 1 atm. A certain amount of substance is taken out so that pressure becomes 0.7 atm. Find the amount taken out (in kg).
After a collision, two particles move together, then the collision is?
What phenomenon is explained by the wave nature of electromagnetic radiation?
If the half-life of \( D \) is 1500 years and \( B \) is 2000 years, what is the mean lifetime?
Number of degrees of freedom for the monoatomic gas molecule is?
Which of the following statement is true?
Wave nature of light can be used to explain which phenomenon?
Relations between the speed of X-ray, gamma-ray, and UV rays when they travel in a vacuum.
A body of mass 0.8kg moves with velocity \( v = 2x^2 + 2 \, \text{m/s} \). What is the work done during its motion from \( x = 0 \) to \( x = 2 \, \text{m} \)?
A liquid of density \( d \) is moving down in a vessel of height \( h \) with an acceleration \( a<g \). Then the pressure at the bottom is?
The fundamental frequency of a string of length \( l \) is \( n \). The string is cut into 3 parts \( l_1, l_2, \) and \( l_3 \), each having fundamental frequency \( n_1, n_2, n_3 \). Then, what is the relationship between \( n_1, n_2, n_3 \)?
Relation between the drift velocity and an electric field is ----?
In an equilateral triangle with each side having resistance \( R \), what is the effective resistance between two sides?
What is the maximum wavelength to excite a hydrogen atom?
In a Carnot engine, efficiency is dependent on ________?
Work done on splitting a spherical drop into 8 droplets?
How can we decrease the effective capacitance of a parallel plate capacitor?
De Broglie wavelength of a quantum photon having energy \( E \)?
Find the resistance required to be connected to a galvanometer of resistance \(100 \, \Omega\) with a full scale deflection of 1mA into a voltmeter of range 1V.
Electrostatic force is maximum when charge \( Q \) is placed at ------?
Tension of a rope when a man of mass \( m \) climbs up or down with an acceleration \( a<g \)?