Class 12 Physics target paper 2025

                           Learn With Irza 
                                 Class XII 
                        Physics New Book
                        Target Paper 2025

                 Section "C"

What is Carnot engine? Give the operation of Carnot cycle and show that eficiency even this engine is less than 100%?

 Describe the molecular movement causes the pressure exerted by gas, drive pressure equation? 
                              OR 
Interpret mathematically that temperature is a measure of average translational K.E of molecules of a gas?

 Describe method for determining the ratio of charge to mass of an electron. Derive the relevant mathematical expression?
                              OR 
What is galvanometer? Explain its construction and working also prove that current passing through the coil of galvanometer is directly proportional to angle of deflection of the coil?

State Faraday law of electro magnetic induction and explain the phenomen of self induction or mutual Induction ?

Provide the mathematical expression of the first law of thermodynamic and explain each term:
 Describe any two:
 Isobaric process
 Isochoric process 
Isothermal process 
Adiabatic process

What is transformer? Describe its types and derive the formula for efficiency of transformer?

                                   OR 

Describe the construction and working of AC generator, also derive the formula of EMF?

 Describe the refrigerator is a heat engine operating in reverse as that of an ideal heat engine and find its efficiency?

 Define rectification and describe the use of diodes for half and full wave rectifications?

                                OR 

Explain force Einstein graph, drive relation for young's modulus and shear modulus? 

State and explain the basic postulate of Einstein's special theory of relativity, discuss mass variation length contraction and time dilation?

                                OR

 Define photoelectric effect and explain photoelectric effect on quantum theory?



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