List of top Physics Questions

A wire is stretched to double its length. New resistance becomes:

Work done in moving a charge on an equipotential surface is:

A capacitor has capacitance $C$. When dielectric of constant $3$ completely fills it, new capacitance is:

Two charges \( 2\mu\text{C} \) and \( 8\mu\text{C} \) are placed \( 2\text{ m} \) apart. Force between them is:

A string of length \( 1 \text{ m} \) fixed at both ends vibrates in second harmonic. Wavelength is:

Two tuning forks produce frequencies \( 256 \text{ Hz} \) and \( 260 \text{ Hz} \). Number of beats per second is:

A closed organ pipe has fundamental frequency \( 100 \text{ Hz} \). Length of pipe is:

A source of sound moves towards a stationary observer with speed \( 10 \text{ m/s} \). Speed of sound = \( 340 \text{ m/s} \). If original frequency is \( 340 \text{ Hz} \), apparent frequency is:

A wave is represented by \( y = 0.1 \sin(200t - 10x) \). Find wave velocity.

A particle executes SHM with amplitude \( 0.1 \text{ m} \) and angular frequency \( 10 \text{ rad/s} \). Maximum acceleration is:

Two SHMs are given by: \[ x_1 = A \sin \omega t, \] \[ x_2 = A \cos \omega t. \] Phase difference is:

A particle in SHM has amplitude \( 2 \text{ m} \) and total energy \( 8 \text{ J} \). Its potential energy at displacement \( 1 \text{ m} \) is:

A mass of \( 1 \text{ kg} \) is attached to a spring of force constant \( 100 \text{ N/m} \). Time period is:

A mass of 1 kg is attached to a spring of force constant 100 N/m. Time period is:

A gas at pressure \( P \), volume \( V \), and temperature \( T \). If pressure is doubled and temperature is halved, the new volume is:

If average kinetic energy per molecule is \( 3 \times 10^{-21} \) J, pressure of gas depends on:

If pressure of a gas is doubled at constant temperature, mean free path becomes:

The RMS velocity of a gas at temperature \( T \) is \( v \). If temperature becomes \( 4T \), new RMS velocity is:

For a gas, \( C_p - C_v = R \). If \( C_v = 2R \), then \( C_p \) is:

A Carnot engine operates between 600 K and 300 K. Efficiency is:

A gas expands from volume 2 m\(^3\) to 6 m\(^3\) at constant pressure 100 Pa. Work done is:

A gas absorbs 500 J heat and does 200 J work. Change in internal energy is:

A body cools from 80°C to 60°C in 5 minutes. Surrounding temperature is 20°C. Time to cool from 60°C to 40°C is:

Heat flows through a rod of length 1 m and area 1 m$^2$. Temperature difference = 10 K. If thermal conductivity = 5 W/mK, heat flow per second is: