A) 0.8 C
B) 1.0 C
C) 5.0 C
D) 4.0 C
Correct Answer: D
Solution :
From Faradays law of electromagnetic induction, the emf (e) induced is equal to rate of change of magnetic flux \[(\phi )\], i.e., \[\left| e \right|=\frac{d\phi }{dt}\] Also, \[\left| e \right|=IR\]where \[I\]is current and R is resistance. \[\therefore \] \[IR=\frac{d\phi }{dt}\] \[\Rightarrow \] \[I\,dt=\frac{d\phi }{R}\] Charge, \[q=Idt=\frac{d\phi }{R}\] Given,\[d\phi =10-2=8\,Wb,\,R=2\,\Omega \] \[\therefore \] \[q=\frac{8}{2}=4\,C\]You need to login to perform this action.
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