In a coil of self-inductance $0.5 \, H$,the current varies at a constant rate from $0 \, A$ to $10 \, A$ in $2 \, s$. The $e.m.f.$ generated in the coil is ... $V$.

  • A
    $10$
  • B
    $5$
  • C
    $2.5$
  • D
    $1.25$

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