MCQ
Hertz is the unit for
- ✓Frequency
- BForce
- CElectric charge
- DMagnetic flux
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$I$.Readings in $A$ and $V_2$ are always in phase
$II$.Reading in $V_1$ is ahead in phase with reading in $V_2$
$III$.Readings in $A$ and $V_1$ are always in phase which of these statements are/is correct
(if $\mu_{0}$ : permeability of free space and $B$ : magnetic field)

$(i)$ The energy stored in the capacitor when the battery is disconnected and the separation is doubled ${E_1}$
$(ii)$ The energy stored in the capacitor when the charging battery is kept connected and the separation between the capacitor plates is doubled is ${E_2}.$
Then ${E_1}/{E_2}$ value is