List of top Physics Questions

The speed of sound waves is maximum in _____ .

Which of the following light phenomena confirms the transverse nature of light?

which of the following is the field of view maximum?

When the charged particles move in a combined magnetic and electric field, then the force acting is known as ___.

The concept of displacement current was introduced by___.

A string in a musical instrument is 50cm long and its fundamental frequency is 800Hz. If a frequency of 1000Hz is to be produced, then what is the required length of string? (Answer to be provided in cm)

An organ pipe closed at one end has a fundamental frequency of 1500Hz. What is the maximum number of overtones generated by this pipe, which a normal person can hear?

At resonance air column of length 20cm resonate with a tuning fork of frequency 450 Hz. ignoring end correction, the velocity of sound in air is? (Answer to be given in m/s)

Standing waves are produced in 10m long stretched string. If the string vibrates in 5 segments and wave velocity is 20m/s, its frequency is? (Answer to be given in Hz)

A body of mass 1 kg moving on a horizontal surface with an initial velocity of 8 m/s comes to rest after 10 seconds. If one wants to keep the body moving on the same surface with the same velocity of 8 m/s, then what is the force required? (Answer required in N)

A particle is falling freely from height h to the ground. (Where h << R and R = Radius of the Earth). Which of the following figure most correctly depicts the acceleration ‘a’ of the particle as a function of time t (neglect air resistance)?

A wire of length 2 m, radius of cross-section 20 mm and Young's Modulus 2×10¹¹ N/m is subjected to a force of 62.8 kN.The change in length of the wire is p×10^–5 (in m). Find P. 

Dipole placed in a sphere, what will be the electric flux?

Damped oscillation constant decreases then what will be the effect of resonance factor?

Five molecules of an ideal gas have velocities 2, 3, 4, 4 and 5 m/s. If their average velocity is \(\bar v\) and their RMS velocity is \(V_{rms}\) then

A motorcyclist is trying to jump across a path as shown by driving horizontally off a cliff A at a speed of 5 m/s. Ignore air resistance and take g = 10m/s² . The speed with which he touches the cliff B is?

The potential energy of a body is given by \(U(x)\) and it has mechanical energy is E. Then its potential energy when its velocity is zero is given by?

A medium having dielectric constant $K>1$ fills the space between the plates of a parallel plate capacitor The plates have large area, and the distance between them is $d$ The capacitor is connected to a battery of voltage $V$ as shown in Figure (a) Now, both the plates are moved by a distance of $\frac{d}{2}$ from their original positions, as shown in Figure (b) 

In the process of going from the configuration depicted in Figure (a) to that in Figure (b), which of the following statement(s) is(are) correct?

The electric field associated with an electromagnetic wave propagating in a dielectric medium is given by \(\vec{E}=30(2\hat{x}+\hat{y})sin[2\pi(5\times10^{14}-\frac{10^7}{3}z)]Vm^{-1}\).
which of the following is correct? [given: speed of light in vacuum \(c=3\times10^8\) m/s]

A string of length 1m and mass 2 x 10^-5 kg is under tension T. When the string vibrates two successive harmonics are found to occur at frequencies 750 Hz and 1000 Hz. The value of tension is ___ Newton.

One mole of an ideal gas expands adiabatically from an initial state(T_A, V₀) to a final state (T_f,5V₀). Another mole of the same gas expands isothermally from a different initial state (T_B, V₀) to the same final state (T_f,5V₀). The ratio of the specific heat of constant pressure and constant volume of the ideal gas is λ. What is the ratio of \(\frac{T_A}{T_B}\)?

What does Lenz's Law give ?

A sphere of density ρ & mass m is moving down with constant velocity in viscous liquid of density ρ₀. Find out viscous force on sphere

Match the temperature of a black body given in L-I with an appropriate statement in L-II and choose the correct option. (given: wien is constant as \(2.9\times10^{-3}\) m.k. \(\frac{hc}{e}=1.24\times10^{-6}\,v.m\)