In a $100\%$ efficient step-down transformer, the primary voltage is $V_p$ and the primary current is $I_p$. Which row shows how the secondary voltage compares with $V_p$ and how the secondary current compares with $I_p$?
- Asecondary voltage greater than $V_p$, secondary current greater than $I_p$
- Bsecondary voltage greater than $V_p$, secondary current less than $I_p$
- Csecondary voltage less than $V_p$, secondary current greater than $I_p$
- Dsecondary voltage less than $V_p$, secondary current less than $I_p$