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NEET
Exam
NEET
Subject
Physics
Chapter
Electromagnetic Induction

NEET · Physics · Electromagnetic Induction

The current i in a coil varies with time as shown in the figure....

The current i\mathrm{i} in a coil varies with time as shown in the figure. The variation of induced emfwith time would be The current i in a coil varies with time as shown in the figure. The variation of induced emfwith time would be

Options

  1. AWhat is Residual Volume (RV)?
  2. BWhat is Residual Volume (RV)?
  3. CWhat is Residual Volume (RV)?
  4. DWhat is Residual Volume (RV)?

Correct answer

D. What is Residual Volume (RV)?

Step-by-step solution

We know, inducedemf e=−Ldidt\mathrm{e}=-\mathrm{L} \frac{\mathrm{di}}{\mathrm{dt}}During 0 to T4,didt=\frac{\mathrm{T}}{4}, \frac{\mathrm{di}}{\mathrm{dt}}= constant So,e=−ve\mathrm{So}, \mathrm{e}=-\mathrm{ve} For T4\frac{T}{4} to T2,didt=0\frac{T}{2}, \frac{d i}{d t}=0 i.e., e=0\mathrm{e}=0 For T4\frac{T}{4} to 3 T4,didt=\frac{3 \mathrm{~T}}{4}, \frac{\mathrm{di}}{\mathrm{dt}}= constant i.e., e=+ve\mathrm{e}=+\mathrm{ve}
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