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a oimititaiit, , , , , and Mutual Induction:, , , Ai, a) Self Induction :- /, , ’, , , , , “The phenomenon of generation of induced emf in coil due to |, change in current in the same coil is called as self induction” he. 2 5, , Consider a coil which js connected to a cell along otha, key as shown in fig. When lap key is pressed then the current tl ough U coil kk, increases, Therefore, magnetic flux associated (linked) with Cot (change, emf is induced in the coil. Such emf js called as iguana ced, phenomenon self induction. ‘i a, , a, , The direction of induced emf is so as to ie e change in magnetic flyx Le, the growth of current. Hence, self induced emf is also callec —, : Let $ be the magnetic flux linked with coil current flowing through the coil., da |, Se LI Adam, , Where, L is constant called as coefficient of irfdg, According to Lenz’s law,, , , , , , , , , and, f and fig Self Hide toy,, , , , , , , , , , , , , , , , from (1), , , , , , Bic (L is constant), , , , , , , , b) Mutual Induction:“The Phenomenon, in a coil due to change in curre, , ws Mutual induction.”, Consider t, as shown in figure. A coil, connected is called as pri, , , , , generation of induced emf, veighboring coil is called as, , , , , , , , , , , nd B is kept near to each other, ich a battery and a tap key is, and a coil B is called as secondary in w, , , , , fig Mumal mduction, , , , , hich a galvanometer is |, , , , circuit is switched on by pressing the t, result of which the Magnetic flux linked w, , with secondary also changes and emf is indu, 7nf in secondary is called as mutual indu, , ction., agnetic flux kinked with secondary coil due to J current in primary,, “. Os a I,, , , , through primary bas, Hence, magnetid ‘us, , , , ith primary changes., ced in secondary. Such, , , , , , , ', i, ap key, the current |, , , , , , , , , , i, *, 5 |, a : 1 i } i |, t called as mutual inductance or coefficient of mutual induction., ceording to Lenz's Law, |, _, do |, clt |, d(MIp) : |, @ 61st Wu from (1) ., dt, ;, dlp ‘ ‘ ., =M <1 cooenaannaas (as M is constant), i, mn i