HSC Science (Computer Science) १२ वीं कक्षा - Maharashtra State Board Question Bank Solutions for Physics

Determine the pressure of nitrogen at 0°C if the density of nitrogen at N.T.P. is 1.25 kg/m³ and R.M.S. speed of the molecules at N.T.P. is 489 m/s.  

What does the phase of π/2 indicate in linear S.H.M.? 

Define linear S.H.M.

In the law of tension, the fundamental frequency of the vibrating string is, ______   

State law of tension.

State law of linear density.

What is the resonance?

How the frequency of the vibrating wire is affected if the load is fully immersed in water? 

A sonometer wire of length 1 m is stretched by a weight of 10 kg. The fundamental frequency of vibration is 100 Hz. Determine the linear density of the material of the wire.

Waves produced by two vibrators in a medium have wavelength 2 m and 2.1 m respectively. When sounded together they produce 8 beats/second. Calculate wave velocity and frequencies of the vibrators.

State and verify the laws of vibrating strings using a sonometer. 

If an electron is brought towards another electron, the electric potential energy of the system ______.

Which physical quantity has its unit as J/C? Is it a scalar or vector?

Find the electric potential at the surface of an atomic nucleus (Z = 50) of radius 9 × 10^-13 cm.  

Three-point charges +q, +2q and Q are placed at the three vertices of an equilateral triangle. Find the value of charge Q (in terms of q), so that the electric potential energy of the system is zero. 

Obtain an expression for the potential energy of a dipole in an external field.

Derive an expression for the electric potential due to an electric dipole.

Four resistances 4 Ω, 8Ω, XΩ and 12Ω are connected in a series to form Wheatstone’s network. If the network is balanced, the value of X is ______.

In a meter bridge, two unknown resistances R and S, when connected between the two gaps, give a null point is 60 cm from one end. What is the ratio of R and S? 

Four resistances 6Ω, 6Ω, 6Ω and 18Ω form a Wheatstone bridge. Find the resistance which connected across the 18Ω resistance will balance the network.