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Important question for class 12th physics

    ( Important question for class 12th physics )


Question (1)— Define potentiometer and explain its principal ?

Question (2)— What is lenz's law. How it can be used to determine the direction of induced current?

Question (3)— Explain Kirchhoff's law ?

Question (4)— Write principal of Wheatstone bridge ?

Question (5)— Write law of reflection ?

Question (6)— Derive Biot-Savart law ?

Question (7)— Explain the following
                        (i) Blue colour of sky
                        (ii) Red colour of sun during sunrise                                 and Sunset

Question (8)— Write the reason for twinkling of stars?

Question (9)— By drawing the energy level diagram, show the spectral lines of Lyman, Balmer and paschen series of hydrogen spectrum ?

Question (10)— Write the difference between electric and magnetic force ?

Question (11)— Differentiate between potentiometer and voltmeter ?

Question (12)— What is electromagnetic induction and Write Faraday law of electromagnetic induction ?

Question (13)— How Galvanometer is converted into Ammeter. Explain it ?

Question (14)— How Galvanometer is converted into voltmeter ?

Question (15)— Describe Rutherford's atomic model. Give reasons why did it fail.

Question (16)— State the postulates of BohrsB atomic model ?

Question (17)— What is meant by logic gates ? What are OR and AND gates ? Draw their symbol and electrical equivalent circuit ?

Question (18)— Describe wan-de-graff generator order the following points (i) principal (ii) Labbele diagram (iii) Construction (iv) working (v) uses


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