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6. Electromagnetic induction — Physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 SciencePhysics6. Electromagnetic induction1 Mark
MCQ
Figure $(i)$ shows a conducting loop being pulled out of a magnetic field with a speed $v$. Which of the four plots shown in figure $(ii)$ may represent the power delivered by the pulling agent as a function of the speed $v$
  • A
    $a$
  • ✓
    $b$
  • C
    $c$
  • D
    $d$
✓

Answer

Correct option: B.
$b$
b
(b)$P = Fv = Bil \times v = B\,\left( {\frac{{Bvl}}{R}} \right)\;l \times v = \frac{{{B^2}{v^2}{l^2}}}{R} \Rightarrow P \propto {v^2}$

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