HSC Science (General) 12th Standard Board Exam - Maharashtra State Board Question Bank Solutions

Light of wavelength 5000 A.U. falls on a plane reflecting surface. The frequency of reflected light is ______ 

In Young’s double-slit experiment, if there is no initial phase difference between the light from the two slits, a point on the screen corresponds to the 5th minimum. What is the path difference? 

Kirchhoff’s second law (voltage law) is based on ______ 

State Kirchhoff’s first (current) law.

State Kirchhoff’s second (voltage) law.

What is the basis of Kirchhoff’s current law and voltage law?

Are Kirchhoff’s laws applicable to both AC and DC circuits?

What is stated in terms of Bohr magneton? 

The electron in the hydrogen atom is moving with a speed of 2.5 × 10⁶ m/s in an orbit of a radius of 0.5 Å. What is the Magnetic moment of the revolving electron?    

Explain the origin of magnetism in material, hence find a magnetic moment of an electron revolving around the nucleus of an atom. 

What is the relation between average current and rms current over half cycle? 

State the average or mean value of an alternating emf? Obtain the expression for it.

State the rms value of an alternating current? Write the relation between the rms value and peak value of an alternating current that varies with time. 

The electrons are emitted in the photoelectric effect from a metal surface.

As the intensity of incident light increases ______ 

The maximum kinetic energy of the photoelectrons depends only on ______ 

Planck's constant is 6.6 × 10^-34 Js. The momentum of each photon is given radiation Is 3.3 × 10^-29 kg/s. The λ of radiation is ______.

Define photoelectric effect. 

The minimum frequency for photoelectric effect on metal is 7 × 10¹⁴ Hz, Find the work function of the metal. 

Find the kinetic energy of the emitted electron, if in photoelectric effect energy of incident Photon is 4 eV and work function is 2.4 eV.