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

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 ______ 

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 ______.

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?

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.

Explain with a neat circuit diagram. How you will determine the unknown resistances using a meter bridge.

In a meter bridge, the balance point is found to be at 39.5 cm from the end A when the resistor R is 12.5 Ω (right gap).

a) Determine the resistance of X (left gap).

b) Determine the balance point of the bridge if X and R are interchanged?

c) What happens if the galvanometer and cell are interchanged at the balance point of the bridge?

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.