List of practice Questions

A mass M is hung with a light inextensible string as shown in the figure. Find the tension of the horizontal string.

A mass of \(Hg\) is executing SHM which is given by \(x=6.0 cos(100t+\frac \pi4)\) cm. What is the maximum kinetic energy?

A uniform rod of mass \(m\) and length \(l_0\) is pivoted at one end and is hanging in the vertical direction. The period of small angular oscillations of the rod is

If minimum deviation is 30°, then speed of light in shown prism will be

1000 N force is required to lift a hook and 10000 N force is requires to lift a load slowly. Find power required to lift hook with load with speed v = 0.5 m/s.

Find the capacitance in shown figure

Find \(V_P-V_Q\) in the circuit shown in figure.

If a capacitor having capacitance \(2F\) and plate separation of \(0.5\ cm\) will have area:

If compressibility of material is \(4×10^{-5}\) per atm, pressure is 100 atm and volume is 100 cm³, then find △V=?

If speed of sound in air is 340 m/s and in water is 1480 m/s. If frequency of sound is 1000 kHz, then find wavelength in water.

Dimension of force is:

Find current (i) in circuit shown in figure.

Find R_net between A and B.

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.

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 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.

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

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

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

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?

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

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

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 density of ethanol