30.Light bulb A is rated at 60 W and light bulb B is rated at 100 W. Both are designed to operate at 110 V. Which statement is correct?
(A) The 60 W bulb has a greater resistance and greater current than the 100 W bulb.
(B) The 60 W bulb has a greater resistance and smaller current than the 100 W bulb.
(C) The 60 W bulb has a smaller resistance and smaller current than the 100 W bulb
(D) The 60 W bulb has a smaller resistance and greater current than the 100 W bulb.
(E) We need to know the resistivities of the filaments to answer this question.
答案:登入後查看
統計: A(0), B(3), C(1), D(0), E(0) #3427030
統計: A(0), B(3), C(1), D(0), E(0) #3427030