A transformer having an efficiency of \(75\%\) is working on \(220~\mathrm{V}\) and \(4.4~\mathrm{kW}\) power supply. If the current in the secondary coil is \(5~\mathrm{A}\). What will be the voltage across the secondary coil and the current in the primary coil?
1. \(
V_s=220 \mathrm{~V}, I_p=20 \mathrm{~A}
\)
2. \( V_s=660 \mathrm{~V}, I_p=15 \mathrm{~A}
\)
3. \( V_s=660 \mathrm{~V}, I_p=20 \mathrm{~A}
\)
4. \( V_s=220 \mathrm{~V}, I_p=15 \mathrm{~A}\)