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CLASS – XII, SUB – PHYSICS, , REVISION SET- 02, , TIME – 2 Hr., F.M. – 100, ,  All questions are compulsory : 1) Write relationship between drift velocity and current., 2) What is wheatstone bridge ? find condition for balanced wheatstone bridge., 3) What is potentiometer and write principle of potentiometer., 4) A wire of resistance 1Ω cut into three equal parts and than connected in, parallel. Find equivalent resistance., 5) A wire II stretch so its length become double, find new resistance and, resistivity., 6) Find current through each resistors., 7), i) find power through 10v battery., ii) find power through 6v battery., iii) find power through 2Ω (Resistance)., 8) Write properties of magnetic field lines., 9) Explain BioT-SAVART law., 10) Write Ampere circuital law and explain solenoid., 11)What is Cyclotron and Application of Cyclotron ?, 12)Write short note on Shunt and Magnetic flux., 13)Write short note on LENZ' law and Eddy current., 14) What is wattless current ?, 15) Explain following terms:- a) Rms current, b) Average current, b) Choke coil, d) Resonant frequency, 16) What is Transformer, Explain working with neat and clean diagram., 17) Write down difference between ferromagnetic, Diamagnetic and, paramagnetic materials., 18) What is Electromagnetic Induction. Explain Faraday law of electromagnetic, induction., 19) Explain elements of earth magnetism., 20) Equation of A.C Current is given as, i=60 Sin 100𝜋𝑡, then find peak current, Irms current and Average current.