HSC Science (Electronics) 12th Standard Board Exam - Maharashtra State Board Question Bank Solutions for Physics

A set of tuning forks is arranged in ascending order of frequencies each tuning fork gives 8 beats/s with the preceding one. If the frequency of the first tuning fork is 120 Hz and the last fork is 200 Hz, then the number of tuning forks arranged will be, ______ 

A wave is represented by an equation y = A Sin(Bx + Ct). Given that the constants A, B, and C are positive, can you tell in which direction the wave is moving? 

Why wave motion is doubly periodic?

Find the amplitude of the resultant wave produced due to interference of two waves given as, y₁ = A₁ sin ωt, y₂ = A₂ sin (ωt + ϕ) 

When light travels from an optically rarer medium to an optically denser medium, the speed decreases because of change in ______ 

Light follows wave nature because ______ 

Young’s double-slit experiment is carried out using green, red and blue light, one colour at a time. The fringe widths recorded are W_G, W_R, and W_B respectively then ______ 

The path difference between two waves meeting at a point is (11/4)λ. The phase difference between the two waves is ______

Which of the following cannot produce two coherent sources?

What is the relation between phase difference and Optical path in terms of speed of light in a vacuum?

A Plane Wavefront of light of wavelength 5500 A.U. is incident on two slits in a screen perpendicular to the direction of light rays. If the total separation of 10 bright fringes on a screen 2 m away is 2 cm. Find the distance between the slits.

State any four conditions for obtaining well defined and steady interference patterns.

The work done in carrying a charge Q once round a circle of radius r with charge q at the centre of the circle is ______ 

The mean free path of electrons in a metal is 4 x 10^-8m. Find the electric field, in units of V/m, which can give on an average 2 eV energy to an electron in the metal.  

Obtain an expression for the electric field intensity at a point outside uniformly charged infinite plane sheet.

Obtain an expression for the capacitance of a parallel plate capacitor without a dielectric. 

A strong magnetic field is applied to a stationary electron. Then the electron ______ 

Which of the following is not a unit of magnetic induction?

What happens to the magnetic field at the centre of a circular current-carrying coil if we double the radius of the coil keeping the current unchanged? 

Explain the construction and working of the Moving coil Galvanometer.