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

Explain the phenomena of surface tension on the basis of molecular theory.

Obtain an expression for the capillary rise or fall using the forces method.  

A u-tube is made up of capillaries of bore 1 mm and 2 mm respectively. The tube is held vertically and partially filled with a liquid of surface tension 49 dyne/cm and zero angles of contact. Calculate the density of the liquid, if the difference in the levels of the meniscus is 1.25 cm. take g = 980 cm/s²  

Two systems at the same temperature are said to be in ______ 

When two objects are said to be in thermal equilibrium?

Write a note on thermodynamic equilibrium.

A particle is moving in a circle with uniform speed. Its motion is ______ 

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.