List of top Physics Questions

Dimension of force is:

The efficiency of an ideal gas with adiabatic exponent γ for the shown cyclic process would be

Velocity is given by \(v=4t(1-2t)\), then find time at which velocity is maximum.

If point charges \(Q_1=2×10^{-7}C\) and \(Q_2=3×10^{-7}C\) are at 30 cm separation, then find electrostatic force between them

\(e^-\) revolving with speed V is producing magnetic field B at center. Find relation between radius of path, B & V?

A regular hexagon of side a. A wire of length 24a is oiled on that hexagon. If current in hexagon is I then find the magnetic moment.

The magnetic moment of an electron orbiting in a circulate orbit of radius r with a speed v is equal to

A disc of moment of inertia 2 kg m² revolving with 8 radian/sec, is placed on another disc of moment of inertia 4 kg m² revolving 4 radian/sec. What is the angular frequency of composite disc?

A runner starts from O and goes to O following path OQRO in 1 hr. What is the net displacement and average speed?

In a LC circuit angular frequency at resonance is ω. What will be the new angular frequency when inductor's inductance is made 2 times and capacitance is made 4 times?

Find density of ethanol

A organ pipe open on both ends in the nth harmonic is in resonance with a source of 1000 Hz. The length of pipe is 16.6 cm and speed of sound in air is 332 m/sec. Find the value of n.

Find ratio of radius of gyration of a disc and ring of same radii at their tangential axis in plane.

\(5sin \frac \pi 2(100t -2x)\)
what is the time period?

Which of the following is fusion?

A ball of 0.5 kg collided with wall at 30° and bounced back elastically. The speed of ball was 12 m/s. The contact remained for 1 sec. What is the force applied by wall on ball?

Kinetic energy of a particle increased 4 times. What will be the relation between initial and final momentum.

The efficiency of heat engine is \(\frac 16\), its efficiency is doubled when the temperature of sink decreases by 62°C, its efficiency doubles. Then what is the temperature of source?

A \(e^-\) when accelerated by \(V\) volts experiences a force \(F\) when it enters a uniform magnetic field. What will the force experience when it is accelerated by \(2V\) volts ?

What is the range of a projectile thrown with velocity 98 m/s with angle 30° from horizontal?

If the efficiency of the engine is 50%, and its work output is 500 J. Find input?

How much intense is 80 db sound in comparison to 40 dB?

A current is flowing through the wire of diameter \(d\) having drift velocity of electron \(v_d\) in it. What will be new drift velocity when diameter of wire is made \(\frac d4\) ?

A force of 10 N acts on a body of mass 0.5 kg for 0.25 sec starting from rest. What is its momentum now?

Find I in shown figure