Answer & explanation
Correct answer: option 3
$\text{Velocity of rod when it falls through distance x is } v = \sqrt{2gx}$
$\text{Potential difference across the capacitor is } V = Blv = Bl \sqrt{2gx}$
Correct answer: option 3
$\text{Velocity of rod when it falls through distance x is } v = \sqrt{2gx}$
$\text{Potential difference across the capacitor is } V = Blv = Bl \sqrt{2gx}$