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NEET 2011
Exam
NEET
Year
2011
Subject
Physics
Chapter
Electromagnetic Induction

NEET 2011 · Physics · Electromagnetic Induction

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

The current ii in a coil varies with time as shown in the figure. The variation of induced emf with time would be The current i in a coil varies with time as shown in the figure. The variation of induced emf with time would be

Options

  1. AWhich one of the following is the unit vector perpendicular to both ( a =- i + j + k ) and ( b = i - j + k ) ?
  2. BWhich one of the following is the unit vector perpendicular to both ( a =- i + j + k ) and ( b = i - j + k ) ?
  3. CWhich one of the following is the unit vector perpendicular to both ( a =- i + j + k ) and ( b = i - j + k ) ?
  4. DWhich one of the following is the unit vector perpendicular to both ( a =- i + j + k ) and ( b = i - j + k ) ?

Correct answer

D. Which one of the following is the unit vector perpendicular to both ( a =- i + j + k ) and ( b = i - j + k ) ?

Step-by-step solution

We know e=-L didt\frac{d i}{d t}During 0 to T4,didt=\frac{T}{4}, \frac{d i}{d t}= constant So, e=−\quad e=- ve For T4\quad \frac{T}{4} to T2,didt=0\frac{T}{2}, \frac{d i}{d t}=0 e=0 For T2\frac{T}{2} to 3T4,didt=\frac{3 T}{4}, \frac{d i}{d t}= constant e=+  ve \text{ ve }
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