NCERT Class XII Chapter
Electromagnetic Induction
Questions With Solutions

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Question : 9
Total: 17
A pair of adjacent coils has a mutual inductance of 1.5 H. If the current in one coil changes from 0 to 20 A in 0.5 s, what is the change of flux linkage with the other coil?
Solution:  
Let the current changes from 0 to 20 A in coil 1 and we are looking for change of flux linked with coil 2.
ϕ2 = MI1
and Δϕ2 = MΔI1
Δϕ2 = 1.5 [20 - 0] or Δϕ2 = 30 Wb
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