A) - 40 V
B) 40 V
C) 140 V
D) 300 V
Correct Answer: B
Solution :
Given, magnetic flux\[(\phi )=5{{t}^{3}}-100t+300\] \[\therefore \] \[\frac{d\phi }{dt}=15{{t}^{2}}-100\] Induced emf\[e=-\frac{d\phi }{dt}\] \[=-(15{{t}^{2}}-100)\] After\[t\text{ }=2s.\] \[e=-(15\times {{2}^{2}}-100)\] \[=-(60-100)\] \[=40\,\,V\]You need to login to perform this action.
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