If the waves are coherent, then the resultant intensity is given by I = I1 + I2 + 2 √(I1 I2 Cos Θ), where Θ is the phase difference between two waves. For the constructive interference the value of Θ = 0°, so that the Cos Θ = 1 and for the destructive interference the value of Θ =…… Continue reading Coherent and incoherent addition of waves
Is the equation for displacement in the n th second dimensionally correct? S = u + a (n- 1/2) Answer: Yes See the explanation given by Vimal Raj If we notice the derivation of this formula let t1=x and t2=y (for my easiness) S(y)=uy + 1/2 ay^2———-(1) S(x)=ux + 1/2 ax^2———–(2) sub (2) from (1) S(y)-S(x)=uy…… Continue reading Is the equation for displacement in the n th second dimensionally correct?
jaipreet singh asked: “can you please tell me the DERIVATION OF CELLS IN SERIES AND PARALLEL?” Answer: I am posting here the simplified treatment to calculate the current in a circuit with combination of cells. In this derivation it is assumed that all cells have the same EMF and same internal resistance. CELLS IN SERIES…… Continue reading DERIVATION OF CELLS IN SERIES AND PARALLEL
Learn thoroughly the first time you learn a new concept. Suppose, the topic Kirchhoff’s laws is taught in class. Revise the topic the same day yourselves. Keep a paper and pen while you revise and jot down whatever you feel important. Please note that you cannot memorize derivations by reading. Write and practice the derivations.…… Continue reading Class XII Physics :: How to prepare well in advance?