(a)`" We are given V" = 220 V, R=1200 Omega`

From Eq. (12.6), we have the current I `= 220V//1200 Omega=0.18 A`.

(b) we are given, `V=220 V, R=100 Omega`.

Form Eq. (12.6), we have the current `I= 220 V // 100 Omega = 2.2 A`.

Note the difference of current drawn by an electric bulb and electric heater form the same 220 V source !