02: Một bình ắc quy 24V – 9AH cấp nguồn cho 4 đèn dây tóc 12V – 4W. a. Hãy vẽ sơ đồ nối 4 đèn trên với ắc quy để 4 đèn sáng bình thường?
b. Tính dòng điện chạy trên dây dẫn cấp nguồn cho 4 đèn?
c. Hãy tính thời gian ắc quy có thể cấp nguồn cho đèn. Biết rằng hệ số xả sâu cho phép của ắc
quy là 0,62.

The magnetic field inside a superconducting solenoid is 4.50 t. the solenoid has an inner diameter of 6.20 cm and a length of 26.0 cm. determine (a) the magnetic energy density in the field and (b) the energy stored in the magnetic field within the solenoid.

During the experiment if you could triple the breakaway magnetic force with all other quantities left unchanged, what is the new value for the critical velocity if it was v0 (initial velocity), initially? (b) now if you halved the radius with all other quantities left unchanged, what is the new critical velocity if it was v0 (initial velocity), initially? (c) if during the experiment, critical velocity quadrupled with all other quantities left unchanged, what is the new breakaway force if its magnitude was initially f0,?

Patricia is trying to compare the average rainfall of new york to that of arizona. a comparison between these two states for the months of july through september would best be measured in