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© In A the ring, the magnetic field changes (increases).
An oppose the paut When the magnet approaches associated with the ring so emf is induced in the sing. According to Lenz's law, the magnetic field and due to the induced emf will always cause ie., the magnetic field due to bau magnet. so the two each other and it retards. Whos the bas magnet goes below field associated with ring decreases . So an emf is induced.
The magnetic field due to the induced emt opposes the motion of bau magnet clause). 30 then also it is retarded. fields oppose the magnetic 2 15 G [ Here we use lena's law and right hand thumb rule I CS Scanned with CamScanner
peth ③ in paut la , the ring is cut. 3o the induced current donot have a closed to flowe. so the magnet is unaffected B Let À be the corea of the loop resistance.
DB 0.2 -0 -0.2T dt =0 Induced emf, E = do 03 - BA at d CBA) loop & R'be the - S = at E = A A dB at Induced current, I 1 I = A dB R at 0.2 - Axor . I- 2A R 0.4 0 dB = 0'4T ; dt =0.25 I= - 02 2A/R possible I CS Scanned with CamScanner
dB = 0.31 ; dt oilS .: I = A x 0.3 - 31/2 > not possible dB = 0.31 ; dt = 0.35 :: I - A х 0.3 0:3 - AR > not possible. dB -0.17 ; dt = 0.05 S .; I A R O'OS 2A/R → possible. dB -0.5 T ; dt =0.45 ... I 0.5 А R Х -25 À → Not poesible options © ¢ are possible.
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