[填空题]
(a) Determine the resistanck(m-: /uq vyrflr5wm-e of, and current througd l7ghl.p o92kh, a 75-W lightbulb connected to its proper source voltage of 120 Vg.d l7ohl2p 9k.
$\Omega$
A
(b) Repeat for a 440-W bulb.
$\Omega$
$\approx$ A(retain one decimal places)